Create tap-able links in the NSAttributedString of a UILabel

Question

I have been searching this for hours but I ve failed  I probably don t even know what I should be looking for   Many applications have text and in this text are web hyperlinks in rounded rect  When I click them UIWebView opens  What puzzles me is that they often have custom links  for example if words starts with   it is also clickable and the application responds by opening another view  How can I do that  Is it possible with UILabel or do I need UITextView or something else

User · Answer

Most simple and reliable approach is to use UITexView as Kedar Paranjape recommended. Based on answer of Karl Nosworthy I finally came up with a simple UITextView subclass:

class LinkTextView: UITextView, UITextViewDelegate {

typealias Links = [String: String]

typealias OnLinkTap = (URL) -> Bool

var onLinkTap: OnLinkTap?

override init(frame: CGRect, textContainer: NSTextContainer?) {
    super.init(frame: frame, textContainer: textContainer)
    isEditable = false
    isSelectable = true
    isScrollEnabled = false //to have own size and behave like a label   
    delegate = self
}

required init?(coder: NSCoder) {
    super.init(coder: coder)
}

func addLinks(_ links: Links) {
    guard attributedText.length > 0  else {
        return
    }
    let mText = NSMutableAttributedString(attributedString: attributedText)
    
    for (linkText, urlString) in links {
        if linkText.count > 0 {
            let linkRange = mText.mutableString.range(of: linkText)
            mText.addAttribute(.link, value: urlString, range: linkRange)
        }
    }
    attributedText = mText
}

func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool {
    return onLinkTap?(URL) ?? true
}

// to disable text selection
func textViewDidChangeSelection(_ textView: UITextView) {
    textView.selectedTextRange = nil
}

}

Usage is very simple:

    let linkTextView = LinkTextView()
    let tu = "Terms of Use"
    let pp = "Privacy Policy"
    linkTextView.text = "Please read the Some Company \(tu) and \(pp)"
    linkTextView.addLinks([
        tu: "https://some.com/tu",
        pp: "https://some.com/pp"
    ])
    linkTextView.onLinkTap = { url in
        print("url: \(url)")
        return true
    }

Note that isScrollEnabled is false by default, as in most cases we need small label-like view with own size and without scrolling. Just set it true if you want a scrollable text view.

Also note that UITextView unlike UILabel has default text padding. To remove it and make layout same as in UILabel just add: linkTextView.textContainerInset = .zero

Implementing onLinkTap closure is not necessary, without it URLs is automatically open by UIApplication.

As Text selection is undesirable in most cases, but it can't be turned off it is dismissed in delegate method (Thanks to Carson Vo)

User · Answer

Some answers didn t work for me as expected  This is Swift solution that supports also textAlignment and multiline  No subclassing needed  just this UITapGestureRecognizer extension  import UIKit   extension UITapGestureRecognizer            func didTapAttributedString   string  String  in label  UILabel  - gt  Bool                    guard let text   label text else                            return false                            let range    text as NSString  range of  string          return self didTapAttributedText label  label  inRange  range                 private func didTapAttributedText label  UILabel  inRange targetRange  NSRange  - gt  Bool                    guard let attributedText   label attributedText else                            assertionFailure  quot attributedText must be set quot               return false                            let textContainer   createTextContainer for  label                   let layoutManager   NSLayoutManager           layoutManager addTextContainer textContainer                   let textStorage   NSTextStorage attributedString  attributedText          if let font   label font                            textStorage addAttribute NSAttributedString Key font  value  font  range  NSMakeRange 0  attributedText length                     textStorage addLayoutManager layoutManager                   let locationOfTouchInLabel   location in  label          let textBoundingBox   layoutManager usedRect for  textContainer          let alignmentOffset   aligmentOffset for  label                   let xOffset     label bounds size width - textBoundingBox size width    alignmentOffset  - textBoundingBox origin x         let yOffset     label bounds size height - textBoundingBox size height    alignmentOffset  - textBoundingBox origin y         let locationOfTouchInTextContainer   CGPoint x  locationOfTouchInLabel x - xOffset  y  locationOfTouchInLabel y - yOffset                   let characterTapped   layoutManager characterIndex for  locationOfTouchInTextContainer  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil                   let lineTapped   Int ceil locationOfTouchInLabel y   label font lineHeight   - 1         let rightMostPointInLineTapped   CGPoint x  label bounds size width  y  label font lineHeight   CGFloat lineTapped           let charsInLineTapped   layoutManager characterIndex for  rightMostPointInLineTapped  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil                   return characterTapped  lt  charsInLineTapped   targetRange contains characterTapped    false                private func createTextContainer for label  UILabel  - gt  NSTextContainer                    let textContainer   NSTextContainer size  label bounds size          textContainer lineFragmentPadding   0 0         textContainer lineBreakMode   label lineBreakMode         textContainer maximumNumberOfLines   label numberOfLines         return textContainer                private func aligmentOffset for label  UILabel  - gt  CGFloat                    switch label textAlignment                        case  left   natural   justified                           return 0 0         case  center                           return 0 5         case  right                           return 1 0                           unknown default                           return 0 0                    Usage  class ViewController  UIViewController             IBOutlet var label   UILabel           let selectableString1    quot consectetur quot      let selectableString2    quot cupidatat quot           override func viewDidLoad             super viewDidLoad                    let text    quot Lorem ipsum dolor sit amet    selectableString1  adipiscing elit  sed do eiusmod tempor incididunt ut labore et dolore magna aliqua  Ut enim ad minim veniam  quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat  Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur  Excepteur sint occaecat   selectableString2  non proident  sunt in culpa qui officia deserunt mollit anim id est laborum  quot          label attributedText   NSMutableAttributedString attributedString  NSAttributedString string  text                    let tapGesture   UITapGestureRecognizer target  self  action   selector labelTapped           label addGestureRecognizer tapGesture          label isUserInteractionEnabled   true                 objc func labelTapped gesture  UITapGestureRecognizer                     if gesture didTapAttributedString selectableString1  in  label                             print  quot   selectableString1  tapped quot             else if gesture didTapAttributedString selectableString2  in  label                             print  quot   selectableString2  tapped quot             else                            print  quot Text tapped quot

User · Answer

I am extending  NAlexN original detailed solution  with  zekel excellent extension of UITapGestureRecognizer  and providing in Swift   Extending UITapGestureRecognizer  extension UITapGestureRecognizer        func didTapAttributedTextInLabel label  UILabel  inRange targetRange  NSRange  - gt  Bool              Create instances of NSLayoutManager  NSTextContainer and NSTextStorage         let layoutManager   NSLayoutManager           let textContainer   NSTextContainer size  CGSize zero          let textStorage   NSTextStorage attributedString  label attributedText               Configure layoutManager and textStorage         layoutManager addTextContainer textContainer          textStorage addLayoutManager layoutManager              Configure textContainer         textContainer lineFragmentPadding   0 0         textContainer lineBreakMode   label lineBreakMode         textContainer maximumNumberOfLines   label numberOfLines         let labelSize   label bounds size         textContainer size   labelSize             Find the tapped character location and compare it to the specified range         let locationOfTouchInLabel   self location in  label          let textBoundingBox   layoutManager usedRect for  textContainer          let textContainerOffset   CGPoint              x   labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x              y   labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y                   let locationOfTouchInTextContainer   CGPoint              x  locationOfTouchInLabel x - textContainerOffset x              y  locationOfTouchInLabel y - textContainerOffset y                   let indexOfCharacter   layoutManager characterIndex for  locationOfTouchInTextContainer  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil           return NSLocationInRange indexOfCharacter  targetRange             Usage  Setup UIGestureRecognizer to send actions to tapLabel   and you can detect if the target ranges is being tapped on in myLabel    IBAction func tapLabel gesture  UITapGestureRecognizer        if gesture didTapAttributedTextInLabel myLabel  inRange  targetRange1            print  Tapped targetRange1         else if gesture didTapAttributedTextInLabel myLabel  inRange  targetRange2            print  Tapped targetRange2         else           print  Tapped none             IMPORTANT  The UILabel line break mode must be set to wrap by word char  Somehow  NSTextContainer will assume that the text is single line only if the line break mode is otherwise

User · Answer

My answer builds on  NAlexN s excellent answer  I won t duplicate his detailed explanation of each step here    I found it most convenient and straightforward to add support for tap-able UILabel text as a category to UITapGestureRecognizer   You don t have to use UITextView s data detectors  as some answers suggest    Add the following method to your UITapGestureRecognizer category        Returns YES if the tap gesture was within the specified range of the attributed text of the label      -  BOOL didTapAttributedTextInLabel  UILabel   label inRange  NSRange targetRange       NSParameterAssert label    nil        CGSize labelSize   label bounds size         create instances of NSLayoutManager  NSTextContainer and NSTextStorage     NSLayoutManager  layoutManager     NSLayoutManager alloc  init       NSTextContainer  textContainer     NSTextContainer alloc  initWithSize CGSizeZero       NSTextStorage  textStorage     NSTextStorage alloc  initWithAttributedString label attributedText           configure layoutManager and textStorage      layoutManager addTextContainer textContainer        textStorage addLayoutManager layoutManager           configure textContainer for the label     textContainer lineFragmentPadding   0 0      textContainer lineBreakMode   label lineBreakMode      textContainer maximumNumberOfLines   label numberOfLines      textContainer size   labelSize          find the tapped character location and compare it to the specified range     CGPoint locationOfTouchInLabel    self locationInView label       CGRect textBoundingBox    layoutManager usedRectForTextContainer textContainer       CGPoint textContainerOffset   CGPointMake  labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x                                                 labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y       CGPoint locationOfTouchInTextContainer   CGPointMake locationOfTouchInLabel x - textContainerOffset x                                                           locationOfTouchInLabel y - textContainerOffset y       NSInteger indexOfCharacter    layoutManager characterIndexForPoint locationOfTouchInTextContainer                                                             inTextContainer textContainer                                    fractionOfDistanceBetweenInsertionPoints nil       if  NSLocationInRange indexOfCharacter  targetRange             return YES        else           return NO            Example Code      in your view controller         create your label  gesture recognizer  attributed text  and get the range of the  link  in your label myLabel userInteractionEnabled   YES   myLabel addGestureRecognizer       UITapGestureRecognizer alloc  initWithTarget self                                             action  selector handleTapOnLabel           create your attributed text and keep an ivar of your  link  text range NSAttributedString  plainText  NSAttributedString  linkText  plainText     NSMutableAttributedString alloc  initWithString   Add label links with UITapGestureRecognizer                                                     attributes nil   linkText     NSMutableAttributedString alloc  initWithString    Learn more                                                       attributes                                                          NSForegroundColorAttributeName  UIColor blueColor                                                        NSMutableAttributedString  attrText     NSMutableAttributedString alloc  init    attrText appendAttributedString plainText    attrText appendAttributedString linkText       ivar -- keep track of the target range so you can compare in the callback targetRange   NSMakeRange plainText length  linkText length     Gesture Callback     handle the gesture recognizer callback and call the category method -  void handleTapOnLabel  UITapGestureRecognizer   tapGesture       BOOL didTapLink    tapGesture didTapAttributedTextInLabel myLabel                                             inRange targetRange       NSLog   didTapLink   d   didTapLink

User · Answer

-  BOOL didTapAttributedTextInLabel  UILabel   label inRange  NSRange targetRange      NSLayoutManager  layoutManager    NSLayoutManager new       NSTextContainer  textContainer     NSTextContainer alloc  initWithSize CGSizeZero       NSTextStorage  textStorage     NSTextStorage alloc  initWithAttributedString label attributedText         layoutManager addTextContainer textContainer        textStorage addLayoutManager layoutManager        textContainer lineFragmentPadding   0 0      textContainer lineBreakMode   label lineBreakMode      textContainer maximumNumberOfLines   label numberOfLines      CGSize labelSize   label bounds size      textContainer size   labelSize       CGPoint locationOfTouchInLabel    self locationInView label       CGRect textBoundingBox    layoutManager usedRectForTextContainer textContainer       CGPoint textContainerOffset   CGPointMake  labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x                                                 labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y       CGPoint locationOfTouchInTextContainer   CGPointMake locationOfTouchInLabel x - textContainerOffset x                                                           locationOfTouchInLabel y - textContainerOffset y       NSUInteger indexOfCharacter   layoutManager characterIndexForPoint locationOfTouchInTextContainer inTextContainer textContainer fractionOfDistanceBetweenInsertionPoints nil        return NSLocationInRange indexOfCharacter  targetRange

User · Answer

Drop-in solution as a category on UILabel  this assumes your UILabel uses an attributed string with some NSLinkAttributeName attributes in it     implementation UILabel  Support   -  BOOL openTappedLinkAtLocation  CGPoint location     CGSize labelSize   self bounds size     NSTextContainer  textContainer     NSTextContainer alloc  initWithSize CGSizeZero     textContainer lineFragmentPadding   0 0    textContainer lineBreakMode   self lineBreakMode    textContainer maximumNumberOfLines   self numberOfLines    textContainer size   labelSize     NSLayoutManager  layoutManager     NSLayoutManager alloc  init      layoutManager addTextContainer textContainer      NSTextStorage  textStorage     NSTextStorage alloc  initWithAttributedString self attributedText      textStorage addAttribute NSFontAttributeName value self font range NSMakeRange 0  textStorage length       textStorage addLayoutManager layoutManager      CGRect textBoundingBox    layoutManager usedRectForTextContainer textContainer     CGPoint textContainerOffset   CGPointMake  labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x                                               labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y     CGPoint locationOfTouchInTextContainer   CGPointMake location x - textContainerOffset x  location y - textContainerOffset y     NSInteger indexOfCharacter    layoutManager characterIndexForPoint locationOfTouchInTextContainer inTextContainer textContainer fractionOfDistanceBetweenInsertionPoints nullptr     if  indexOfCharacter  gt   0        NSURL  url    textStorage attribute NSLinkAttributeName atIndex indexOfCharacter effectiveRange nullptr       if  url            UIApplication sharedApplication  openURL url         return YES              return NO      end

User · Answer

For fully custom links  you ll need to use a UIWebView - you can intercept the calls out  so that you can go to some other part of your app instead when a link is pressed

User · Answer

Here is my answer based on  Luca Davanzo s answer  override the touchesBegan event instead of a tap gesture   import UIKit  public protocol TapableLabelDelegate  NSObjectProtocol      func tapableLabel   label  TapableLabel  didTapUrl url  String  atRange range  NSRange     public class TapableLabel  UILabel    private var links   String  NSRange        private set  var layoutManager   NSLayoutManager   private set  var textContainer   NSTextContainer size  CGSize zero  private set  var textStorage   NSTextStorage         didSet           textStorage addLayoutManager layoutManager           public weak var delegate  TapableLabelDelegate   public override var attributedText  NSAttributedString        didSet           if let attributedText   attributedText               textStorage   NSTextStorage attributedString  attributedText            else               textStorage   NSTextStorage               links                          public override var lineBreakMode  NSLineBreakMode       didSet           textContainer lineBreakMode   lineBreakMode          public override var numberOfLines  Int       didSet           textContainer maximumNumberOfLines   numberOfLines           public override init frame  CGRect        super init frame  frame      setup      public required init  coder aDecoder  NSCoder        super init coder  aDecoder      setup      public override func layoutSubviews         super layoutSubviews       textContainer size   bounds size         addLinks         - Parameters        - text  text of link       - url  link url string public func addLink   text  String  withURL url  String        guard let theText   attributedText  string as  NSString else           return            let range   theText range of  text       guard range location     NSNotFound else           return            links url    range    private func setup         isUserInteractionEnabled   true     layoutManager addTextContainer textContainer      textContainer lineFragmentPadding   0     textContainer lineBreakMode   lineBreakMode     textContainer maximumNumberOfLines    numberOfLines    public override func touchesBegan   touches  Set lt UITouch gt   with event  UIEvent         guard let locationOfTouch   touches first  location in  self  else           return            textContainer size   bounds size     let indexOfCharacter   layoutManager glyphIndex for  locationOfTouch  in  textContainer       for  urlString  range  in links           if NSLocationInRange indexOfCharacter  range   let url   URL string  urlString                delegate  tapableLabel self  didTapUrl  urlString  atRange  range

User · Answer

UITextView supports data-detectors in OS3 0  whereas UILabel doesn t   If you enable the data-detectors on the UITextView and your text contains URLs  phone numbers  etc  they will appear as links

User · Answer

In general  if we want to have a clickable link in text displayed by UILabel  we would need to resolve two independent tasks    Changing the appearance of a portion of the text to look like a link Detecting and handling touches on the link  opening an URL is a particular case    The first one is easy  Starting from iOS 6 UILabel supports display of attributed strings  All you need to do is to create and configure an instance of NSMutableAttributedString   NSMutableAttributedString  attributedString     NSMutableAttributedString alloc  initWithString   String with a link  attributes nil   NSRange linkRange   NSMakeRange 14  4      for the word  link  in the string above  NSDictionary  linkAttributes      NSForegroundColorAttributeName    UIColor colorWithRed 0 05 green 0 4 blue 0 65 alpha 1 0                                     NSUnderlineStyleAttributeName     NSUnderlineStyleSingle      attributedString setAttributes linkAttributes range linkRange       Assign attributedText to UILabel label attributedText   attributedString    That s it  The code above makes UILabel to display String with a link  Now we should detect touches on this link  The idea is to catch all taps within UILabel and figure out whether the location of the tap was close enough to the link  To catch touches we can add tap gesture recognizer to the label  Make sure to enable userInteraction for the label  it s turned off by default   label userInteractionEnabled   YES   label addGestureRecognizer   UITapGestureRecognizer alloc  initWithTarget self action  selector handleTapOnLabel         Now the most sophisticated stuff  finding out whether the tap was on where the link is displayed and not on any other portion of the label  If we had single-lined UILabel  this task could be solved relatively easy by hardcoding the area bounds where the link is displayed  but let s solve this problem more elegantly and for general case - multiline UILabel without preliminary knowledge about the link layout   One of the approaches is to use capabilities of Text Kit API introduced in iOS 7      Create instances of NSLayoutManager  NSTextContainer and NSTextStorage NSLayoutManager  layoutManager     NSLayoutManager alloc  init   NSTextContainer  textContainer     NSTextContainer alloc  initWithSize CGSizeZero   NSTextStorage  textStorage     NSTextStorage alloc  initWithAttributedString attributedString       Configure layoutManager and textStorage  layoutManager addTextContainer textContainer    textStorage addLayoutManager layoutManager       Configure textContainer textContainer lineFragmentPadding   0 0  textContainer lineBreakMode   label lineBreakMode  textContainer maximumNumberOfLines   label numberOfLines    Save created and configured instances of NSLayoutManager  NSTextContainer and NSTextStorage in properties in your class  most likely UIViewController s descendant  - we ll need them in other methods   Now  each time the label changes its frame  update textContainer s size   -  void viewDidLayoutSubviews        super viewDidLayoutSubviews       self textContainer size   self label bounds size      And finally  detect whether the tap was exactly on the link   -  void handleTapOnLabel  UITapGestureRecognizer   tapGesture       CGPoint locationOfTouchInLabel    tapGesture locationInView tapGesture view       CGSize labelSize   tapGesture view bounds size      CGRect textBoundingBox    self layoutManager usedRectForTextContainer self textContainer       CGPoint textContainerOffset   CGPointMake  labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x                                                 labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y       CGPoint locationOfTouchInTextContainer   CGPointMake locationOfTouchInLabel x - textContainerOffset x                                                           locationOfTouchInLabel y - textContainerOffset y       NSInteger indexOfCharacter    self layoutManager characterIndexForPoint locationOfTouchInTextContainer                                                             inTextContainer self textContainer                                    fractionOfDistanceBetweenInsertionPoints nil       NSRange linkRange   NSMakeRange 14  4      it s better to save the range somewhere when it was originally used for marking link in attributed string     if  NSLocationInRange indexOfCharacter  linkRange                Open an URL  or handle the tap on the link in any other way           UIApplication sharedApplication  openURL  NSURL URLWithString   https   stackoverflow com

User · Answer

TAGS  Swift2 0  I take inspiration on - excellent -  NAlexN s answer and I decide to write by myself a wrapper of UILabel  I also tried TTTAttributedLabel but I can t make it works    Hope you can appreciate this code  any suggestions are welcome    import Foundation   objc protocol TappableLabelDelegate       optional func tappableLabel tabbableLabel  TappableLabel  didTapUrl  NSURL  atRange  NSRange         Represent a label with attributed text inside      We can add a correspondence between a range of the attributed string an a link  URL      By default  link will be open on the external browser  see  openLinkOnExternalBrowser   class TappableLabel  UILabel           MARK  - Public properties -      var links  NSMutableDictionary           var openLinkOnExternalBrowser   true     var delegate  TappableLabelDelegate          MARK  - Constructors -      override func awakeFromNib             super awakeFromNib           self enableInteraction              override init frame  CGRect            super init frame  frame          self enableInteraction              required init  coder aDecoder  NSCoder            super init coder  aDecoder             private func enableInteraction             self userInteractionEnabled   true         self addGestureRecognizer UITapGestureRecognizer target  self  action  Selector  didTapOnLabel                    MARK  - Public methods -              Add correspondence between a range and a link       - parameter url    url      - parameter range  range on which couple url             func addLink url url  String  atRange range  NSRange            self links url    range               MARK  - Public properties -              Action rised on user interaction on label       - parameter tapGesture  gesture             func didTapOnLabel tapGesture  UITapGestureRecognizer            let labelSize   self bounds size           let layoutManager   NSLayoutManager           let textContainer   NSTextContainer size  CGSizeZero          let textStorage   NSTextStorage attributedString  self attributedText               configure textContainer for the label         textContainer lineFragmentPadding   0         textContainer lineBreakMode   self lineBreakMode         textContainer maximumNumberOfLines   self numberOfLines         textContainer size   labelSize              configure layoutManager and textStorage         layoutManager addTextContainer textContainer          textStorage addLayoutManager layoutManager              find the tapped character location and compare it to the specified range         let locationOfTouchInLabel   tapGesture locationInView self           let textBoundingBox   layoutManager usedRectForTextContainer textContainer          let textContainerOffset   CGPointMake  labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x               labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y          let locationOfTouchInTextContainer   CGPointMake locationOfTouchInLabel x - textContainerOffset x              locationOfTouchInLabel y - textContainerOffset y          let indexOfCharacter   layoutManager characterIndexForPoint locationOfTouchInTextContainer              inTextContainer textContainer              fractionOfDistanceBetweenInsertionPoints  nil           for  url  value  in self links               if let range   value as  NSRange                   if NSLocationInRange indexOfCharacter  range                        let url   NSURL string  url as  String                       if self openLinkOnExternalBrowser                           UIApplication sharedApplication   openURL url                                            self delegate  tappableLabel  self  didTapUrl  url  atRange  range

User · Answer

The UIButtonTypeCustom is a clickable label if you don t set any images for it

User · Answer

Here is a swift version of NAlexN s answer   class TapabbleLabel  UILabel    let layoutManager   NSLayoutManager   let textContainer   NSTextContainer size  CGSize zero  var textStorage   NSTextStorage         didSet           textStorage addLayoutManager layoutManager           var onCharacterTapped    label  UILabel  characterIndex  Int  - gt  Void    let tapGesture   UITapGestureRecognizer    override var attributedText  NSAttributedString        didSet           if let attributedText   attributedText               textStorage   NSTextStorage attributedString  attributedText            else               textStorage   NSTextStorage                      override var lineBreakMode  NSLineBreakMode       didSet           textContainer lineBreakMode   lineBreakMode          override var numberOfLines  Int       didSet           textContainer maximumNumberOfLines   numberOfLines               Creates a new view with the passed coder     param  aDecoder The a decoder    returns  the created new view      required init  coder aDecoder  NSCoder        super init coder  aDecoder      setUp           Creates a new view with the passed frame     param  frame The frame    returns  the created new view      override init frame  CGRect        super init frame  frame      setUp           Sets up the view      func setUp         userInteractionEnabled   true     layoutManager addTextContainer textContainer      textContainer lineFragmentPadding   0     textContainer lineBreakMode   lineBreakMode     textContainer maximumNumberOfLines   numberOfLines     tapGesture addTarget self  action   selector TapabbleLabel labelTapped           addGestureRecognizer tapGesture     override func layoutSubviews         super layoutSubviews       textContainer size   bounds size    func labelTapped gesture  UITapGestureRecognizer        guard gesture state     Ended else           return            let locationOfTouch   gesture locationInView gesture view      let textBoundingBox   layoutManager usedRectForTextContainer textContainer      let textContainerOffset   CGPoint x   bounds width - textBoundingBox width    2 - textBoundingBox minX                                        y   bounds height - textBoundingBox height    2 - textBoundingBox minY              let locationOfTouchInTextContainer   CGPoint x  locationOfTouch x - textContainerOffset x                                                   y  locationOfTouch y - textContainerOffset y      let indexOfCharacter   layoutManager characterIndexForPoint locationOfTouchInTextContainer                                                                  inTextContainer  textContainer                                                                  fractionOfDistanceBetweenInsertionPoints  nil       onCharacterTapped  label  self  characterIndex  indexOfCharacter        You can then create an instance of that class inside your viewDidLoad method like this   let label   TapabbleLabel   label translatesAutoresizingMaskIntoConstraints   false view addSubview label  view addConstraints NSLayoutConstraint constraintsWithVisualFormat  V  - view -                                                   options      metrics  nil  views    view    label    view addConstraints NSLayoutConstraint constraintsWithVisualFormat  H  - view -                                                   options      metrics  nil  views    view    label     let attributedString   NSMutableAttributedString string   String with a link   attributes  nil  let linkRange   NSMakeRange 14  4      for the word  link  in the string above  let linkAttributes   String   AnyObject          NSForegroundColorAttributeName   UIColor blueColor    NSUnderlineStyleAttributeName   NSUnderlineStyle StyleSingle rawValue      NSLinkAttributeName   http   www apple com   attributedString setAttributes linkAttributes  range linkRange   label attributedText   attributedString  label onCharacterTapped     label  characterIndex in     if let attribute   label attributedText  attribute NSLinkAttributeName  atIndex  characterIndex  effectiveRange  nil  as  String          let url   NSURL string  attribute            UIApplication sharedApplication   openURL url            It s better to have a custom attribute to use when a character is tapped  Now  it s the NSLinkAttributeName  but could be anything and you can use that value to do other things other than opening a url  you can do any custom action

User · Answer

I d strongly recommend using a library that automatically detects URLs in text and converts them to links   Try    TTTAttributedLabel  pod   ZSWTappableLabel  pod      Both are under MIT license

User · Answer

based on Charles Gamble answer  this what I used  I removed some lines that confused me and gave me wrong indexed     -  BOOL didTapAttributedTextInLabel  UILabel   label inRange  NSRange targetRange TapGesture  UIGestureRecognizer   gesture      NSParameterAssert label    nil           create instances of NSLayoutManager  NSTextContainer and NSTextStorage     NSLayoutManager  layoutManager     NSLayoutManager alloc  init       NSTextStorage  textStorage     NSTextStorage alloc  initWithAttributedString label attributedText           configure layoutManager and textStorage      textStorage addLayoutManager layoutManager           configure textContainer for the label     NSTextContainer  textContainer     NSTextContainer alloc  initWithSize CGSizeMake label frame size width  label frame size height         textContainer lineFragmentPadding   0 0      textContainer lineBreakMode   label lineBreakMode      textContainer maximumNumberOfLines   label numberOfLines          find the tapped character location and compare it to the specified range     CGPoint locationOfTouchInLabel    gesture locationInView label        layoutManager addTextContainer textContainer      move here  not sure it that matter that calling this line after textContainer is set      NSInteger indexOfCharacter    layoutManager characterIndexForPoint locationOfTouchInLabel                                                            inTextContainer textContainer                                   fractionOfDistanceBetweenInsertionPoints nil       if  NSLocationInRange indexOfCharacter  targetRange             return YES        else           return NO

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Here is example code to hyperlink UILabel  Source http   sickprogrammersarea blogspot in 2014 03 adding-links-to-uilabel html   import  ViewController h   import  TTTAttributedLabel h    interface ViewController     end   implementation ViewController       UITextField  loc      TTTAttributedLabel  data     -  void viewDidLoad        super viewDidLoad       UILabel  lbl     UILabel alloc  initWithFrame CGRectMake 5  20  80  25          lbl setText   Text          lbl setFont  UIFont fontWithName   Verdana  size 16         lbl setTextColor  UIColor grayColor        loc   UITextField alloc  initWithFrame CGRectMake 4  20  300  30          loc backgroundColor    UIColor grayColor       loc borderStyle UITextBorderStyleRoundedRect      loc clearButtonMode UITextFieldViewModeWhileEditing         loc setText   Enter Location        loc clearsOnInsertion   YES      loc leftView lbl      loc leftViewMode UITextFieldViewModeAlways       loc setDelegate self        self view addSubview loc        loc setRightViewMode UITextFieldViewModeAlways       CGRect frameimg   CGRectMake 110  70  70 30       UIButton  srchButton    UIButton buttonWithType UIButtonTypeRoundedRect       srchButton frame frameimg       srchButton setTitle   Go  forState UIControlStateNormal        srchButton setTitleColor  UIColor blackColor  forState UIControlStateNormal       srchButton backgroundColor  UIColor clearColor        srchButton addTarget self action  selector go   forControlEvents UIControlEventTouchDown        self view addSubview srchButton       data     TTTAttributedLabel alloc  initWithFrame CGRectMake 5  120 self view frame size width 200          data setFont  UIFont fontWithName   Verdana  size 16         data setTextColor  UIColor blackColor        data numberOfLines 0      data delegate   self      data enabledTextCheckingTypes NSTextCheckingTypeLink NSTextCheckingTypePhoneNumber       self view addSubview data     -  void attributedLabel  TTTAttributedLabel   label didSelectLinkWithURL  NSURL   url       NSString  val   NSString alloc initWithFormat       url       if    url scheme  hasPrefix   mailto                    NSLog    mail URL Selected       url           MFMailComposeViewController  comp   MFMailComposeViewController alloc init            comp setMailComposeDelegate self           if  MFMailComposeViewController canSendMail                         NSString  recp   val substringToIndex  val length   substringFromIndex 7               NSLog   Recept       recp                comp setToRecipients  NSArray arrayWithObjects recp  nil                 comp setSubject   From my app                 comp setMessageBody   Hello bro  isHTML NO                comp setModalTransitionStyle UIModalTransitionStyleCrossDissolve                self presentViewController comp animated YES completion nil                       else            UIApplication sharedApplication  openURL  NSURL URLWithString val            - void mailComposeController  MFMailComposeViewController   controller didFinishWithResult  MFMailComposeResult result error  NSError   error      if error                UIAlertView  alrt   UIAlertView alloc initWithTitle   Erorr  message   Some error occureed  delegate nil cancelButtonTitle     otherButtonTitles nil  nil            alrt show            self dismissViewControllerAnimated YES completion nil             else           self dismissViewControllerAnimated YES completion nil            -  void attributedLabel  TTTAttributedLabel   label didSelectLinkWithPhoneNumber  NSString   phoneNumber       NSLog   Phone Number Selected       phoneNumber       UIDevice  device    UIDevice currentDevice       if    device model  isEqualToString   iPhone                 UIApplication sharedApplication  openURL  NSURL URLWithString  NSString stringWithFormat   tel     phoneNumber           else           UIAlertView  Notpermitted   UIAlertView alloc  initWithTitle   Alert  message   Your device doesn t support this feature   delegate nil cancelButtonTitle   OK  otherButtonTitles nil            Notpermitted show           - void go  id sender        data setText loc text      - void touchesBegan  NSSet   touches withEvent  UIEvent   event       NSLog   Reached         loc resignFirstResponder

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Like there is reported in earlier answer the UITextView is able to handle touches on links  This can easily be extended by making other parts of the text work as links  The AttributedTextView library is a UITextView subclass that makes it very easy to handle these  For more info see  https   github com evermeer AttributedTextView  You can make any part of the text interact like this  where textView1 is a UITextView IBOutlet    textView1 attributer        1    red      append  This is the first test     green      append  Click on    black      append  evict nl   makeInteract     in         UIApplication shared open URL string   http   evict nl     options       completionHandler    completed in          underline      append   for testing links     black      append  Next test   underline makeInteract     in         print  NEXT              all font UIFont name   SourceSansPro-Regular   size  16        setLinkColor UIColor purple     And for handling hashtags and mentions you can use code like this   textView1 attributer     test  What  hashtags do we have in  evermeer  AtributedTextView library       matchHashtags underline      matchMentions      makeInteract   link in         UIApplication shared open URL string   https   twitter com  link replacingOccurrences of       with           options       completionHandler    completed in

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Worked in Swift 3  pasting the entire code here            Make sure the textview  Selectable    checked  and  Editable   Unchecked   import UIKit  class ViewController  UIViewController  UITextViewDelegate         IBOutlet var theNewTextView  UITextView      override func viewDidLoad             super viewDidLoad                  textview   Selectable   checked  and Editable   Unchecked          theNewTextView delegate   self          let theString   NSMutableAttributedString string   Agree to Terms           let theRange   theString mutableString range of   Terms            theString addAttribute NSLinkAttributeName  value   ContactUs      range  theRange           let theAttribute    NSForegroundColorAttributeName  UIColor blue  NSUnderlineStyleAttributeName  NSUnderlineStyle styleSingle rawValue  as  String   Any           theNewTextView linkTextAttributes   theAttribute       theNewTextView attributedText   theString               theString setAttributes theAttribute  range  theRange              func textView   textView  UITextView  shouldInteractWith URL  URL  in characterRange  NSRange  interaction  UITextItemInteraction  - gt  Bool            if  URL scheme  hasPrefix  ContactUs                       return false   interaction not allowed                          Set storyboard id same as VC name         self navigationController  pushViewController  self storyboard  instantiateViewController withIdentifier   TheLastViewController     as UIViewController  animated  true           return true

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I follow this version   Swift 4   import Foundation  class AELinkedClickableUILabel  UILabel        typealias YourCompletion      - gt  Void      var linkedRange  NSRange      var completion  YourCompletion        objc func linkClicked sender  UITapGestureRecognizer            if let completionBlock   completion                let textView   UITextView frame  self frame              textView text   self text             textView attributedText   self attributedText             let index   textView layoutManager characterIndex for  sender location in  self                                                                 in  textView textContainer                                                                fractionOfDistanceBetweenInsertionPoints  nil               if linkedRange lowerBound  lt   index  amp  amp  linkedRange upperBound  gt   index                    completionBlock                                          This method will be used to set an attributed text specifying the linked text with a     handler when the link is clicked         public func setLinkedTextWithHandler text String  link  String  handler   escaping   - gt     - gt  Bool            let attributextText   NSMutableAttributedString string  text          let foundRange   attributextText mutableString range of  link           if foundRange location    NSNotFound               self linkedRange   foundRange             self completion   handler             attributextText addAttribute NSAttributedStringKey link  value  text  range  foundRange              self isUserInteractionEnabled   true             self addGestureRecognizer UITapGestureRecognizer target  self  action   selector linkClicked sender                  return true                   return false           Call Example   button setLinkedTextWithHandler text   This website  stackoverflow com  is awesome   link   stackoverflow com             show popup or open to link

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I created UILabel subclass named ResponsiveLabel which is based on textkit API introduced in iOS 7  It uses the same approach suggested by NAlexN  It provides flexibility to specify a pattern to search in the text  One can specify styles to be applied to those patterns as well as action to be performed on tapping the patterns     Detects email in text   NSString  emailRegexString      A-Z0-9    -    A-Z0-9 -      A-Z  2 4     NSError  error   NSRegularExpression  regex     NSRegularExpression alloc initWithPattern emailRegexString options 0 error  amp error    PatternDescriptor  descriptor     PatternDescriptor alloc initWithRegex regex withSearchType PatternSearchTypeAll withPatternAttributes   NSForegroundColorAttributeName  UIColor redColor       self customLabel enablePatternDetection descriptor     If you want to make a string clickable  you can do this way  This code applies attributes to each occurrence of the string  text     PatternTapResponder tapResponder     NSString  string        NSLog   tapped       string        self customLabel enableStringDetection   text  withAttributes   NSForegroundColorAttributeName  UIColor redColor                                                                    RLTapResponderAttributeName  tapResponder

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I m extending  samwize s answer to handle multi-line UILabel and give an example on using for a UIButton  extension UITapGestureRecognizer        func didTapAttributedTextInButton button  UIButton  inRange targetRange  NSRange  - gt  Bool           guard let label   button titleLabel else   return false           return didTapAttributedTextInLabel label  inRange  targetRange             func didTapAttributedTextInLabel label  UILabel  inRange targetRange  NSRange  - gt  Bool              Create instances of NSLayoutManager  NSTextContainer and NSTextStorage         let layoutManager   NSLayoutManager           let textContainer   NSTextContainer size  CGSize zero          let textStorage   NSTextStorage attributedString  label attributedText               Configure layoutManager and textStorage         layoutManager addTextContainer textContainer          textStorage addLayoutManager layoutManager              Configure textContainer         textContainer lineFragmentPadding   0 0         textContainer lineBreakMode   label lineBreakMode         textContainer maximumNumberOfLines   label numberOfLines         let labelSize   label bounds size         textContainer size   labelSize             Find the tapped character location and compare it to the specified range         let locationOfTouchInLabel   self locationInView label          let textBoundingBox   layoutManager usedRectForTextContainer textContainer          let textContainerOffset   CGPointMake  labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x                                                 labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y           let locationOfTouchInTextContainer   CGPointMake  locationOfTouchInLabel x - textContainerOffset x                                                            0               Adjust for multiple lines of text         let lineModifier   Int ceil locationOfTouchInLabel y   label font lineHeight   - 1         let rightMostFirstLinePoint   CGPointMake labelSize width  0          let charsPerLine   layoutManager characterIndexForPoint rightMostFirstLinePoint  inTextContainer  textContainer  fractionOfDistanceBetweenInsertionPoints  nil           let indexOfCharacter   layoutManager characterIndexForPoint locationOfTouchInTextContainer  inTextContainer  textContainer  fractionOfDistanceBetweenInsertionPoints  nil          let adjustedRange   indexOfCharacter    lineModifier   charsPerLine           return NSLocationInRange adjustedRange  targetRange

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I found a other solution   I find a way to detect the link in a html text that you find from the internet you transform it into nsattributeString with     func htmlAttributedString fontSize  CGFloat   17 0  - gt  NSAttributedString                let fontName   UIFont systemFont ofSize  fontSize  fontName             let string   self appending String format    lt style gt body font-family        font-size  fpx   lt  style gt    fontName  fontSize               guard let data   string data using  String Encoding utf16  allowLossyConversion  false  else   return nil                guard let html   try  NSMutableAttributedString                   data  data                  options   NSAttributedString DocumentReadingOptionKey documentType  NSAttributedString DocumentType html                   documentAttributes  nil  else   return nil               return html             My method allows you to detect the hyperlink without having to specify them    first you create an extension of the tapgesturerecognizer     extension UITapGestureRecognizer   func didTapAttributedTextInLabel label  UILabel  inRange targetRange  NSRange  - gt  Bool       guard let attrString   label attributedText else           return false            let layoutManager   NSLayoutManager       let textContainer   NSTextContainer size   zero      let textStorage   NSTextStorage attributedString  attrString       layoutManager addTextContainer textContainer      textStorage addLayoutManager layoutManager       textContainer lineFragmentPadding   0     textContainer lineBreakMode   label lineBreakMode     textContainer maximumNumberOfLines   label numberOfLines     let labelSize   label bounds size     textContainer size   labelSize      let locationOfTouchInLabel   self location in  label      let textBoundingBox   layoutManager usedRect for  textContainer      let textContainerOffset   CGPoint x   labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x  y   labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y      let locationOfTouchInTextContainer   CGPoint x  locationOfTouchInLabel x - textContainerOffset x  y  locationOfTouchInLabel y - textContainerOffset y      let indexOfCharacter   layoutManager characterIndex for  locationOfTouchInTextContainer  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil      return NSLocationInRange indexOfCharacter  targetRange          then in you view controller you created a list of url and ranges to store all the links and the range that the attribute text contain   var listurl    String           var listURLRange    NSRange         to find the URL and the URLRange you can use         fun findLinksAndRange attributeString   NSAttributeString           notification enumerateAttribute NSAttributedStringKey link   in  NSMakeRange 0  notification length   options    longestEffectiveRangeNotRequired     value  range  isStop in                     if let value   value                           print    value  found at   range location                            let stringValue      value                           listurl append stringValue                          listURLRange append range                                                       westlandNotifcationLabel addGestureRecognizer UITapGestureRecognizer target   self  action   selector handleTapOnLabel                 then you implementing the handle tap      objc func handleTapOnLabel   recognizer  UITapGestureRecognizer            for index in 0   lt listURLRange count              if recognizer didTapAttributedTextInLabel label  westlandNotifcationLabel  inRange  listURLRange index                     goToWebsite url   listurl index                                      func goToWebsite url   String           if let websiteUrl   URL string  url               if  available iOS 10                       UIApplication shared open websiteUrl  options                                                 completionHandler                                                 success  in                                             print  Open   websiteUrl     success                                     else                   let success   UIApplication shared openURL websiteUrl                  print  Open   websiteUrl     success                                    and here we go   I hope this solution help you like it help me

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I had a hard time dealing with this    UILabel with links on it on attributed text    it is just a headache so I ended up using ZSWTappableLabel

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Translating  samwize s Extension to Swift 4   extension UITapGestureRecognizer       func didTapAttributedTextInLabel label  UILabel  inRange targetRange  NSRange  - gt  Bool           guard let attrString   label attributedText else               return false                    let layoutManager   NSLayoutManager           let textContainer   NSTextContainer size   zero          let textStorage   NSTextStorage attributedString  attrString           layoutManager addTextContainer textContainer          textStorage addLayoutManager layoutManager           textContainer lineFragmentPadding   0         textContainer lineBreakMode   label lineBreakMode         textContainer maximumNumberOfLines   label numberOfLines         let labelSize   label bounds size         textContainer size   labelSize          let locationOfTouchInLabel   self location in  label          let textBoundingBox   layoutManager usedRect for  textContainer          let textContainerOffset   CGPoint x   labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x  y   labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y          let locationOfTouchInTextContainer   CGPoint x  locationOfTouchInLabel x - textContainerOffset x  y  locationOfTouchInLabel y - textContainerOffset y          let indexOfCharacter   layoutManager characterIndex for  locationOfTouchInTextContainer  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil          return NSLocationInRange indexOfCharacter  targetRange            To set up the recognizer  once you colored the text and stuff    lblTermsOfUse isUserInteractionEnabled   true lblTermsOfUse addGestureRecognizer UITapGestureRecognizer target  self  action   selector handleTapOnLabel             then the gesture recognizer    objc func handleTapOnLabel   recognizer  UITapGestureRecognizer        guard let text   lblAgreeToTerms attributedText  string else           return            if let range   text range of  NSLocalizedString   onboarding terms   comment   terms             recognizer didTapAttributedTextInLabel label  lblAgreeToTerms  inRange  NSRange range  in  text             goToTermsAndConditions         else if let range   text range of  NSLocalizedString   onboarding privacy   comment   privacy             recognizer didTapAttributedTextInLabel label  lblAgreeToTerms  inRange  NSRange range  in  text             goToPrivacyPolicy

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As I mentioned in this post   here is a light-weighted library I created specially for links in UILabel FRHyperLabel   To achieve an effect like this     Lorem ipsum dolor sit amet  consectetur adipiscing elit  Pellentesque quis blandit eros  sit amet vehicula justo  Nam at urna neque  Maecenas ac sem eu sem porta dictum nec vel tellus   use code     Step 1  Define a normal attributed string for non-link texts NSString  string     Lorem ipsum dolor sit amet  consectetur adipiscing elit  Pellentesque quis blandit eros  sit amet vehicula justo  Nam at urna neque  Maecenas ac sem eu sem porta dictum nec vel tellus    NSDictionary  attributes     NSFontAttributeName   UIFont preferredFontForTextStyle UIFontTextStyleHeadline     label attributedText     NSAttributedString alloc initWithString string attributes attributes       Step 2  Define a selection handler block void  handler  FRHyperLabel  label  NSString  substring      FRHyperLabel  label  NSString  substring       NSLog   Selected       substring          Step 3  Add link substrings  label setLinksForSubstrings     Lorem     Pellentesque     blandit     Maecenas   withLinkHandler handler

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This generic method works too    func didTapAttributedTextInLabel gesture  UITapGestureRecognizer  inRange targetRange  NSRange  - gt  Bool            let layoutManager   NSLayoutManager           let textContainer   NSTextContainer size  CGSize zero          guard let strAttributedText   self attributedText else               return false                    let textStorage   NSTextStorage attributedString  strAttributedText              Configure layoutManager and textStorage         layoutManager addTextContainer textContainer          textStorage addLayoutManager layoutManager              Configure textContainer         textContainer lineFragmentPadding   Constants lineFragmentPadding         textContainer lineBreakMode   self lineBreakMode         textContainer maximumNumberOfLines   self numberOfLines         let labelSize   self bounds size         textContainer size   CGSize width  labelSize width  height  CGFloat greatestFiniteMagnitude              Find the tapped character location and compare it to the specified range         let locationOfTouchInLabel   gesture location in  self           let xCordLocationOfTouchInTextContainer   locationOfTouchInLabel x         let yCordLocationOfTouchInTextContainer   locationOfTouchInLabel y         let locOfTouch   CGPoint x  xCordLocationOfTouchInTextContainer                                    y  yCordLocationOfTouchInTextContainer           let indexOfCharacter   layoutManager characterIndex for  locOfTouch  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil           guard let strLabel   text else               return false                    let charCountOfLabel   strLabel count          if indexOfCharacter  lt   charCountOfLabel - 1                return NSLocationInRange indexOfCharacter  targetRange            else               return false                   And you can call the method with  let text   yourLabel text let termsRange    text as NSString  range of  fullString  if yourLabel didTapAttributedTextInLabel gesture  UITapGestureRecognizer  inRange  termsRange                showCorrespondingViewController

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Create the class with the following  h and  m files  In the  m file there is the following function   -  void linkAtPoint  CGPoint location   Inside this function we will check the ranges of substrings for which we need to give actions  Use your own logic to put your ranges   And following is the usage of the subclass  TaggedLabel  label     TaggedLabel alloc  initWithFrame CGRectMake 100  100  100  100     self view addSubview label   label numberOfLines   0  NSMutableAttributedString  attributtedString     NSMutableAttributedString alloc  initWithString     My name is  jjpp  attributes      NSFontAttributeName    UIFont systemFontOfSize 10                                                                                                                                                                                      Do not forget to add the font attribute   else it wont work   it is very important  attributtedString addAttribute NSForegroundColorAttributeName                         value  UIColor redColor                          range NSMakeRange 11  5     you can give this range inside the  m function mentioned above   following is the  h file   import  lt UIKit UIKit h gt    interface TaggedLabel   UILabel lt NSLayoutManagerDelegate gt    property nonatomic  strong NSLayoutManager  layoutManager   property nonatomic  strong NSTextContainer  textContainer   property nonatomic  strong NSTextStorage  textStorage   property nonatomic  strong NSArray  tagsArray   property readwrite  copy  tagTapped nameTagTapped    end      following is the  m file   import  TaggedLabel h   implementation TaggedLabel  -  id initWithFrame  CGRect frame    self    super initWithFrame frame    if  self       self userInteractionEnabled   YES     return self     -  id initWithCoder  NSCoder   aDecoder    self    super initWithCoder aDecoder   if  self     self userInteractionEnabled   YES    return self     -  void setupTextSystem     layoutManager     NSLayoutManager alloc  init     textContainer     NSTextContainer alloc  initWithSize CGSizeZero     textStorage     NSTextStorage alloc  initWithAttributedString self attributedText       Configure layoutManager and textStorage    layoutManager addTextContainer  textContainer      textStorage addLayoutManager  layoutManager       Configure textContainer   textContainer lineFragmentPadding   0 0    textContainer lineBreakMode   NSLineBreakByWordWrapping    textContainer maximumNumberOfLines   0   self userInteractionEnabled   YES   self textContainer size   self bounds size     -  void touchesBegan  NSSet   touches withEvent  UIEvent   event    if    layoutManager        self setupTextSystem          Get the info for the touched link if there is one  CGPoint touchLocation     touches anyObject  locationInView self     self linkAtPoint touchLocation      -  void linkAtPoint  CGPoint location       Do nothing if we have no text  if   textStorage string length    0       return         Work out the offset of the text in the view  CGPoint textOffset    self calcGlyphsPositionInView       Get the touch location and use text offset to convert to text cotainer coords  location x -  textOffset x   location y -  textOffset y   NSUInteger touchedChar     layoutManager glyphIndexForPoint location inTextContainer  textContainer       If the touch is in white space after the last glyph on the line we don t     count it as a hit on the text  NSRange lineRange   CGRect lineRect     layoutManager lineFragmentUsedRectForGlyphAtIndex touchedChar effectiveRange  amp lineRange    if  CGRectContainsPoint lineRect  location     NO       return         Find the word that was touched and call the detection block     NSRange range   NSMakeRange 11  5    for this example i m hardcoding the range here  In a real scenario it should be iterated through an array for checking all the ranges     if   touchedChar  gt   range location   amp  amp  touchedChar  lt   range location   range length              NSLog   range-- gt  gt     self tagsArray i    range              -  CGPoint calcGlyphsPositionInView    CGPoint textOffset   CGPointZero   CGRect textBounds     layoutManager usedRectForTextContainer  textContainer    textBounds size width   ceil textBounds size width    textBounds size height   ceil textBounds size height     if  textBounds size height  lt  self bounds size height       CGFloat paddingHeight    self bounds size height - textBounds size height    2 0    textOffset y   paddingHeight       if  textBounds size width  lt  self bounds size width       CGFloat paddingHeight    self bounds size width - textBounds size width    2 0    textOffset x   paddingHeight      return textOffset       end

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NSString  string   name      NSError  error   NULL      NSDataDetector  detector        NSDataDetector dataDetectorWithTypes  NSTextCheckingTypes NSTextCheckingTypeLink   NSTextCheckingTypePhoneNumber                                     error  amp error       NSArray  matches    detector matchesInString string                                          options 0                                            range NSMakeRange 0   string length         for  NSTextCheckingResult  match in matches                if    match resultType     NSTextCheckingTypePhoneNumber                         NSString  phoneNumber    match phoneNumber               NSLog    Phone Number is      phoneNumber               label enabledTextCheckingTypes   NSTextCheckingTypePhoneNumber                     if   match resultType     NSTextCheckingTypeLink                         NSURL  email    match URL               NSLog   Email is       email               label enabledTextCheckingTypes   NSTextCheckingTypeLink                     if    match resultType     NSTextCheckingTypeLink                         NSURL  url    match URL               NSLog   URL is       url               label enabledTextCheckingTypes   NSTextCheckingTypeLink                       label text  name

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Modified  timbroder code to handle multiple line correctly for swift4 2  extension UITapGestureRecognizer        func didTapAttributedTextInLabel label  UILabel  inRange targetRange  NSRange  - gt  Bool              Create instances of NSLayoutManager  NSTextContainer and NSTextStorage         let layoutManager   NSLayoutManager           let textContainer   NSTextContainer size  CGSize zero          let textStorage   NSTextStorage attributedString  label attributedText               Configure layoutManager and textStorage         layoutManager addTextContainer textContainer          textStorage addLayoutManager layoutManager              Configure textContainer         textContainer lineFragmentPadding   0 0         textContainer lineBreakMode   label lineBreakMode         textContainer maximumNumberOfLines   label numberOfLines         let labelSize   label bounds size         textContainer size   labelSize             Find the tapped character location and compare it to the specified range         let locationOfTouchInLabel   self location in  label          let textBoundingBox   layoutManager usedRect for  textContainer          let textContainerOffset   CGPoint x   labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x                                            y   labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y           let locationOfTouchInTextContainer   CGPoint x   locationOfTouchInLabel x - textContainerOffset x                                                        y  0               Adjust for multiple lines of text         let lineModifier   Int ceil locationOfTouchInLabel y   label font lineHeight   - 1         let rightMostFirstLinePoint   CGPoint x  labelSize width  y  0          let charsPerLine   layoutManager characterIndex for  rightMostFirstLinePoint  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil           let indexOfCharacter   layoutManager characterIndex for  locationOfTouchInTextContainer  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil          let adjustedRange   indexOfCharacter    lineModifier   charsPerLine          var newTargetRange   targetRange         if lineModifier  gt  0               newTargetRange location   targetRange location  lineModifier Int ceil locationOfTouchInLabel y                      return NSLocationInRange adjustedRange  newTargetRange            UILabel Code  let tapAction   UITapGestureRecognizer target  self  action   selector self tapLabel gesture      let quote    For full details please see our privacy policy and cookie policy   let attributedString   NSMutableAttributedString string  quote   let string1  String    privacy policy   string2  String    cookie policy      privacy policy let rangeString1   quote range of  string1   let indexString1  Int   quote distance from  quote startIndex  to  rangeString1 lowerBound  attributedString addAttributes                font   lt UIfont gt                 foregroundColor   lt UI Color gt                 underlineStyle  0   underlineColor UIColor clear            range  NSRange location  indexString1  length  string1 count        cookie policy let rangeString2   quote range of  string2   let indexString2  Int   quote distance from  quote startIndex  to  rangeString2 lowerBound    attributedString addAttributes                font   lt UIfont gt                 foregroundColor   lt UI Color gt                 underlineStyle  0   underlineColor UIColor clear            range  NSRange location  indexString2  length  string2 count     let label   UILabel   label frame   CGRect x  20  y  200  width  375  height  100  label isUserInteractionEnabled   true label addGestureRecognizer tapAction  label attributedText   attributedString    Code to recognise the Tap    objc   func tapLabel gesture  UITapGestureRecognizer         if gesture didTapAttributedTextInLabel label   lt UILabel gt   inRange  termsLabelRange               print  Terms of service          else if gesture didTapAttributedTextInLabel label  lt UILabel gt  inRange  privacyPolicyLabelRange                print  Privacy policy          else               print  Tapped none

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Here   s a Swift implementation that is about as minimal as possible that also includes touch feedback  Caveats    You must set fonts in your NSAttributedStrings You can only use NSAttributedStrings  You must ensure your links cannot wrap  use non breaking spaces    u a0    You cannot change the lineBreakMode or numberOfLines after setting the text You create links by adding attributes with  link keys      public class LinkLabel  UILabel       private var storage  NSTextStorage      private let textContainer   NSTextContainer       private let layoutManager   NSLayoutManager       private var selectedBackgroundView   UIView        override init frame  CGRect            super init frame  frame          textContainer lineFragmentPadding   0         layoutManager addTextContainer textContainer          textContainer layoutManager   layoutManager         isUserInteractionEnabled   true         selectedBackgroundView isHidden   true         selectedBackgroundView backgroundColor   UIColor white  0  alpha  0 3333          selectedBackgroundView layer cornerRadius   4         addSubview selectedBackgroundView             public required convenience init coder  NSCoder            self init frame   zero             public override func layoutSubviews             super layoutSubviews           textContainer size   frame size            public override func touchesBegan   touches  Set lt UITouch gt   with event  UIEvent             super touchesBegan touches  with  event          setLink for  touches             public override func touchesMoved   touches  Set lt UITouch gt   with event  UIEvent             super touchesMoved touches  with  event          setLink for  touches             private func setLink for touches  Set lt UITouch gt             if let pt   touches first  location in  self   let  characterRange       link at  pt                let glyphRange   layoutManager glyphRange forCharacterRange  characterRange  actualCharacterRange  nil              selectedBackgroundView frame   layoutManager boundingRect forGlyphRange  glyphRange  in  textContainer  insetBy dx  -3  dy  -3              selectedBackgroundView isHidden   false           else               selectedBackgroundView isHidden   true                      public override func touchesCancelled   touches  Set lt UITouch gt   with event  UIEvent             super touchesCancelled touches  with  event          selectedBackgroundView isHidden   true            public override func touchesEnded   touches  Set lt UITouch gt   with event  UIEvent             super touchesEnded touches  with  event          selectedBackgroundView isHidden   true          if let pt   touches first  location in  self   let     url    link at  pt                UIApplication shared open url                       private func link at point  CGPoint  - gt   NSRange  URL             let touchedGlyph   layoutManager glyphIndex for  point  in  textContainer          let touchedChar   layoutManager characterIndexForGlyph at  touchedGlyph          var range   NSRange           let attrs   attributedText  attributes at  touchedChar  effectiveRange   amp range          if let urlstr   attrs  link  as  String               return  range  URL string  urlstr              else               return nil                      public override var attributedText  NSAttributedString            didSet               textContainer maximumNumberOfLines   numberOfLines             textContainer lineBreakMode   lineBreakMode             if let txt   attributedText                   storage   NSTextStorage attributedString  txt                  storage  addLayoutManager layoutManager                  layoutManager textStorage   storage                 textContainer size   frame size

User · Answer

Yes this is possible albeit very confusing to figure out at first  I will go a step further and show you how you can even click on any area in the text as well   With this method you can have UI Label tha is    Multiline Friendly  Autoshrink Friendly Clickable Friendly  yes  even individual characters  Swift 5   Step 1   Make the UILabel have the properties for Line Break of  Truncate Tail  and set a minimum font scale   If you are unfamiliar with font scale just remember this rule    minimumFontSize defaultFontSize   fontscale  In my case I wanted 7 2 to be the minimum font size and my starting font size was 36  Therefore  7 2   36   0 2    Step 2   If you do not care about the labels being clickable and just wanted a working multiline label you are done   HOWEVER  if you want the labels to be clickable read on     Add this following extension I created  extension UILabel        func setOptimalFontSize maxFontSize CGFloat text String           let width   self bounds size width          var font size CGFloat   maxFontSize   Set the maximum font size          var stringSize   NSString string  text  size withAttributes    font   self font withSize font size            while stringSize width  gt  width               font size   font size - 1             stringSize   NSString string  text  size withAttributes    font   self font withSize font size                       self font   self font withSize font size   Forcefully change font to match what it would be graphically            It s used like this  just replace  lt Label gt  with your actual label name     lt Label gt  setOptimalFontSize maxFontSize  36 0  text  formula    This extension is needed because auto shrink does NOT change the  font  property of the label after it auto-shrinks so you have to deduce it by calculating it the same way it does by using  size withAttributes  function which simulates what it s size would be with that particular font   This is necessary because the solution for detecting where to click on the label requires the exact font size to be known   Step 3   Add the following extension   extension UITapGestureRecognizer        func didTapAttributedTextInLabel label  UILabel  inRange targetRange  NSRange  - gt  Bool              Create instances of NSLayoutManager  NSTextContainer and NSTextStorage         let layoutManager   NSLayoutManager           let textContainer   NSTextContainer size  CGSize zero           let mutableAttribString   NSMutableAttributedString attributedString  label attributedText           mutableAttribString addAttributes  NSAttributedString Key font  label font    range  NSRange location  0  length  label attributedText  length            let paragraphStyle   NSMutableParagraphStyle           paragraphStyle lineSpacing   6         paragraphStyle lineBreakMode    byTruncatingTail         paragraphStyle alignment    center         mutableAttribString addAttributes   paragraphStyle  paragraphStyle   range  NSMakeRange 0  mutableAttribString string count            let textStorage   NSTextStorage attributedString  mutableAttribString              Configure textContainer         textContainer lineFragmentPadding   0 0         textContainer lineBreakMode   label lineBreakMode         textContainer maximumNumberOfLines   label numberOfLines             Configure layoutManager and textStorage         layoutManager addTextContainer textContainer           textStorage addLayoutManager layoutManager           let labelSize   label bounds size          textContainer size   labelSize             Find the tapped character location and compare it to the specified range         let locationOfTouchInLabel   self location in  label           let textBoundingBox   layoutManager usedRect for  textContainer            let textContainerOffset   CGPointMake  labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x                                                   labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y           let textContainerOffset   CGPoint x   labelSize width - textBoundingBox size width    0 5 - textBoundingBox origin x  y   labelSize height - textBoundingBox size height    0 5 - textBoundingBox origin y             let locationOfTouchInTextContainer   CGPointMake locationOfTouchInLabel x - textContainerOffset x                                                             locationOfTouchInLabel y - textContainerOffset y           let locationOfTouchInTextContainer   CGPoint x  locationOfTouchInLabel x - textContainerOffset x  y  locationOfTouchInLabel y - textContainerOffset y           let indexOfCharacter   layoutManager characterIndex for  locationOfTouchInTextContainer  in  textContainer  fractionOfDistanceBetweenInsertionPoints  nil          print  IndexOfCharacter   indexOfCharacter           print  TargetRange   targetRange          return NSLocationInRange indexOfCharacter  targetRange             You will need to modify this extension for your particular multiline situation   In my case you will notice that I use a paragraph style   let paragraphStyle   NSMutableParagraphStyle           paragraphStyle lineSpacing   6         paragraphStyle lineBreakMode    byTruncatingTail         paragraphStyle alignment    center         mutableAttribString addAttributes   paragraphStyle  paragraphStyle   range  NSMakeRange 0  mutableAttribString string count     Make sure to change this in the extension to what you are actually using for your line spacing so that everything calculates correctly   Step 4   Add the gestureRecognizer to the label in viewDidLoad or where you think is appropriate like so  just replace  lt Label gt  with your label name again    lt Label gt  addGestureRecognizer UITapGestureRecognizer target self  action   selector tapLabel gesture        Here is a simplified example of my tapLabel function  just replace  lt Label gt  with your UILabel name     IBAction func tapLabel gesture  UITapGestureRecognizer            guard let text    lt Label gt  attributedText  string else               return                    let click range   text range of    a                if gesture didTapAttributedTextInLabel label   lt Label gt   inRange  NSRange click range   in  text                print  Tapped a b            else              print  Tapped none                     Just a note in my example  my string is BED   N   d     RBE     d    a          so I was just getting the range of the a    in this case   You could add   n  to the string to add a newline and whatever text you wanted after and test this to find a string on the next line and it will still find it and detect the click correctly   That s it  You are done   Enjoy a multiline clickable label

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Here s a drop-in Objective-C category that enables clickable links in existing UILabel attributedText strings  exploiting the existing NSLinkAttributeName attribute    interface UILabel  GSBClickableLinks   lt UIGestureRecognizerDelegate gt   property BOOL enableLinks   end   import  lt objc runtime h gt  static const void  INDEX  static const void  TAP    implementation UILabel  GSBClickableLinks   -  void setEnableLinks  BOOL enableLinks       UITapGestureRecognizer  tap   objc getAssociatedObject self   amp TAP      retreive tap     if  enableLinks  amp  amp   tap       add a gestureRegonzier to the UILabel to detect taps         tap    UITapGestureRecognizer alloc initWithTarget self action  selector openLink            tap delegate   self           self addGestureRecognizer tap           objc setAssociatedObject self   amp TAP  tap  OBJC ASSOCIATION RETAIN NONATOMIC      save tap           self userInteractionEnabled   enableLinks     note - when false UILAbel wont receive taps  hence disable links    -  BOOL enableLinks       return  BOOL objc getAssociatedObject self   amp TAP      ie tap    nil       First check whether user tapped on a link within the attributedText of the label     If so  then the our label s gestureRecogizer will subsequently fire  and open the corresponding NSLinkAttributeName     If not  then the tap will get passed along  eg to the enclosing UITableViewCell       Note  save which character in the attributedText was clicked so that we dont have to redo everything again in openLink  -  BOOL gestureRecognizerShouldBegin  UIGestureRecognizer   gestureRecognizer       if  gestureRecognizer    objc getAssociatedObject self   amp TAP   return YES     dont block other gestures  eg swipe          Re-layout the attributedText to find out what was tapped     NSTextContainer  textContainer    NSTextContainer alloc initWithSize self frame size       textContainer lineFragmentPadding   0      textContainer maximumNumberOfLines   self numberOfLines      textContainer lineBreakMode   self lineBreakMode      NSLayoutManager  layoutManager   NSLayoutManager new       layoutManager addTextContainer textContainer       NSTextStorage  textStorage    NSTextStorage alloc initWithAttributedString self attributedText        textStorage addLayoutManager layoutManager        NSUInteger index    layoutManager characterIndexForPoint  gestureRecognizer locationInView self                                               inTextContainer textContainer                     fractionOfDistanceBetweenInsertionPoints NULL       objc setAssociatedObject self   amp INDEX    index   OBJC ASSOCIATION RETAIN NONATOMIC      save index      return  BOOL  self attributedText attribute NSLinkAttributeName atIndex index effectiveRange NULL      tapped on part of a link     -  void openLink       NSUInteger index    objc getAssociatedObject self   amp INDEX  unsignedIntegerValue      retrieve index     NSURL  url    self attributedText attribute NSLinkAttributeName atIndex index effectiveRange NULL       if  url  amp  amp   UIApplication sharedApplication canOpenURL url    UIApplication sharedApplication openURL url       end    This would be a bit cleaner done via a UILabel subclass  ie none of the objc getAssociatedObject mess   but if you are like me you prefer to avoid having to make unnecessary  3rd party  subclasses just to add some extra function to existing UIKit classes  Also  this has the beauty that it adds clickable-links to any existing UILabel  eg existing UITableViewCells   I ve tried to make it as minimally invasive as possible by using the existing NSLinkAttributeName attribute stuff already available in NSAttributedString  So its a simple as   NSURL  myURL    NSURL URLWithString   http   www google com    NSMutableAttributedString  myString    NSMutableAttributedString alloc initWithString   This string has a clickable link       myString appendAttributedString  NSAttributedString alloc initWithString   click here  attributes   NSLinkAttributeName myURL         myLabel attributedText   myString  myLabel enableLinks   YES     yes  that s all   -    Basically  it works by adding a UIGestureRecognizer to your UILabel  The hard work is done in gestureRecognizerShouldBegin   which re-layouts the attributedText string to find out which character was tapped on  If this character was part of a NSLinkAttributeName then the gestureRecognizer will subsequently fire  retrieve the corresponding URL  from the NSLinkAttributeName value   and open the link per the usual  UIApplication sharedApplication openURL url  process   Note - by doing all this in gestureRecognizerShouldBegin   if you dont happen to tap on a link in the label  the event is passed along  So  for example  your UITableViewCell will capture taps on links  but otherwise behave normally  select cell  unselect  scroll         I ve put this in a GitHub repository here  Adapted from Kai Burghardt s SO posting here

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This is a Xamarin iOS c  implementation based on Kedar s answer   MyClickableTextViewWithCustomUrlScheme implementation with ShouldInteractWithUrl override      Inspired from https   stackoverflow com a 44112932 15186 internal class MyClickableTextViewWithCustomUrlScheme   UITextView  IUITextViewDelegate       public MyClickableTextViewWithCustomUrlScheme                 Initialize               public MyClickableTextViewWithCustomUrlScheme Foundation NSCoder coder    base coder                Initialize               public MyClickableTextViewWithCustomUrlScheme Foundation NSObjectFlag t    base t                Initialize               public MyClickableTextViewWithCustomUrlScheme IntPtr handle    base handle                Initialize               public MyClickableTextViewWithCustomUrlScheme CoreGraphics CGRect frame    base frame                Initialize               public MyClickableTextViewWithCustomUrlScheme CoreGraphics CGRect frame  NSTextContainer textContainer    base frame  textContainer                Initialize               void Initialize                 Delegate   this              Export  textView shouldInteractWithURL inRange         public new bool ShouldInteractWithUrl UITextView textView  NSUrl URL  NSRange characterRange                if  URL Scheme CompareTo   username      0                           Launch the Activity             return false                       The system will handle the URL         return base ShouldInteractWithUrl textView  URL  characterRange             Converted objective-C code in c  becomes   MyClickableTextViewWithCustomUrlScheme uiHabitTile   new MyClickableTextViewWithCustomUrlScheme    uiHabitTile Selectable   true  uiHabitTile ScrollEnabled   false  uiHabitTile Editable   false      https   stackoverflow com a 34014655 15186 string wholeTitle     This is an example by marcelofabri    NSMutableAttributedString attributedString   new NSMutableAttributedString wholeTitle   attributedString AddAttribute UIStringAttributeKey Link     new NSString  username   marcelofabri       attributedString Value RangeOfString   marcelofabri      NSMutableDictionary lt NSString  NSObject gt  linkAttributes   new NSMutableDictionary lt NSString  NSObject gt     linkAttributes UIStringAttributeKey ForegroundColor    UIColor Green  linkAttributes UIStringAttributeKey UnderlineColor    UIColor LightGray  linkAttributes UIStringAttributeKey UnderlineStyle    new NSNumber  short NSUnderlineStyle PatternSolid    uiHabitTile AttributedText   attributedString    Make sure to set Editable   false and Selectable   true to be able to click the link   Also ScrollEnabled   true allows the textview to size its height correctly

User · Answer

Old question but if anyone can use a UITextView instead of a UILabel  then it is easy  Standard URLs  phone numbers etc will be automatically detected  and be clickable     However  if you need custom detection  that is  if you want to be able to call any custom method after a user clicks on a particular word  you need to use NSAttributedStrings with an NSLinkAttributeName attribute that will point to a custom URL scheme as opposed to having the http url scheme by default   Ray Wenderlich has it covered here  Quoting the code from the aforementioned link   NSMutableAttributedString  attributedString     NSMutableAttributedString alloc  initWithString   This is an example by  marcelofabri      attributedString addAttribute NSLinkAttributeName                      value   username   marcelofabri                        range   attributedString string  rangeOfString    marcelofabri       NSDictionary  linkAttributes     NSForegroundColorAttributeName   UIColor greenColor                                NSUnderlineColorAttributeName   UIColor lightGrayColor                                NSUnderlineStyleAttributeName    NSUnderlinePatternSolid        assume that textView is a UITextView previously created  either by code or Interface Builder  textView linkTextAttributes   linkAttributes     customizes the appearance of links textView attributedText   attributedString  textView delegate   self    To detect those link clicks  implement this   -  BOOL textView  UITextView   textView shouldInteractWithURL  NSURL   URL inRange  NSRange characterRange       if    URL scheme  isEqualToString   username              NSString  username    URL host               do something with this username                        return NO            return YES     let the system open this URL     PS  Make sure your UITextView is selectable

[ios] Create tap-able "links" in the NSAttributedString of a UILabel?

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