How can I make a button have a rounded border in Swift

Question

I m building an app using swift in the latest version of Xcode 6  and would like to know how I can modify my button so that it can have a rounded border that I could adjust myself if needed  Once that s done  how can I change the color of the border itself without adding a background to it  In other words I want a slightly rounded button with no background  only a 1pt border of a certain color

User · Answer

import UIKit   IBDesignable class RoundedButton  UIButton             IBInspectable var cornerRadius  CGFloat   8      IBInspectable var borderColor  UIColor     lightGray          override func draw   rect  CGRect            layer cornerRadius   cornerRadius         layer masksToBounds   true         layer borderWidth   1         layer borderColor   borderColor  cgColor

User · Answer

I think the easiest and the cleanest way  is to use protocol to avoid inherit and code repetition  You can change this properties directly from storyboard   protocol Traceable       var cornerRadius  CGFloat   get set       var borderColor  UIColor    get set       var borderWidth  CGFloat   get set      extension UIView  Traceable         IBInspectable var cornerRadius  CGFloat           get   return layer cornerRadius           set               layer masksToBounds   true             layer cornerRadius   newValue                       IBInspectable var borderColor  UIColor            get               guard let cgColor   layer borderColor else   return nil               return  UIColor cgColor  cgColor                    set   layer borderColor   newValue  cgColor               IBInspectable var borderWidth  CGFloat           get   return layer borderWidth           set   layer borderWidth   newValue             Update   In this link you can find an example with the utility of Traceable protocol

User · Answer

This class is based from all the comments and suggestions in answers  and also can be designable directly from xcode  Copy to your project and insert any UIButton and change to use custom class  now just select border or background color from xcode for normal and or highlighted states           RoundedButton swift     import UIKit   IBDesignable class RoundedButton UIButton         IBInspectable var borderWidth  CGFloat   0           didSet               layer borderWidth   borderWidth                       Normal state bg and border      IBInspectable var normalBorderColor  UIColor            didSet               layer borderColor   normalBorderColor  CGColor                       IBInspectable var normalBackgroundColor  UIColor            didSet               setBgColorForState normalBackgroundColor  forState   Normal                          Highlighted state bg and border      IBInspectable var highlightedBorderColor  UIColor        IBInspectable var highlightedBackgroundColor  UIColor            didSet               setBgColorForState highlightedBackgroundColor  forState   Highlighted                        private func setBgColorForState color  UIColor   forState  UIControlState           if color    nil               setBackgroundImage UIImage imageWithColor color    forState  forState             else               setBackgroundImage nil  forState  forState                       override func layoutSubviews             super layoutSubviews            layer cornerRadius   layer frame height   2         clipsToBounds   true          if borderWidth  gt  0               if state     Normal  amp  amp   CGColorEqualToColor layer borderColor  normalBorderColor  CGColor                    layer borderColor   normalBorderColor  CGColor               else if state     Highlighted  amp  amp  highlightedBorderColor    nil                  layer borderColor   highlightedBorderColor  CGColor                                     Extension Required by RoundedButton to create UIImage from UIColor extension UIImage       class func imageWithColor color  UIColor  - gt  UIImage           let rect  CGRect   CGRectMake 0  0  1  1          UIGraphicsBeginImageContextWithOptions CGSizeMake 1  1   false  1 0          color setFill           UIRectFill rect          let image  UIImage   UIGraphicsGetImageFromCurrentImageContext           UIGraphicsEndImageContext           return image

User · Answer

Use button layer cornerRadius  button layer borderColor and button layer borderWidth  Note that borderColor requires a CGColor  so you could say  Swift 3 4    button backgroundColor    clear button layer cornerRadius   5 button layer borderWidth   1 button layer borderColor   UIColor black cgColor

User · Answer

To do this job in storyboard  Interface Builder Inspector   With help of IBDesignable  we can add more options to Interface Builder Inspector for UIButton and tweak them on storyboard  First  add the following code to your project    IBDesignable extension UIButton         IBInspectable var borderWidth  CGFloat           set               layer borderWidth   newValue                   get               return layer borderWidth                       IBInspectable var cornerRadius  CGFloat           set               layer cornerRadius   newValue                   get               return layer cornerRadius                       IBInspectable var borderColor  UIColor            set               guard let uiColor   newValue else   return               layer borderColor   uiColor cgColor                   get               guard let color   layer borderColor else   return nil               return UIColor cgColor  color                      Then simply set the attributes for buttons on storyboard

User · Answer

TRY THIS Button Border With Rounded Corners  anyButton backgroundColor    clear  anyButton layer cornerRadius   anyButton frame height   2  anyButton layer borderWidth   1  anyButton layer borderColor   UIColor black cgColor

User · Answer

I think this is the simple form Button1 layer cornerRadius   10 Half of the length and width  Button1 layer borderWidth   2

User · Answer

Based on  returntrue answer I managed to implement it in Interface Builder   To get round corners button using Interface Builder add a Key Path    layer cornerRadius  with Type    Number  and Value    10   or other value as required  in the  User Defined RunTime Attribute  of the Identity Inspector of the button

User · Answer

as aside tip make sure your button is not subclass of any custom class in story board   in such a case your code best place should be in custom class it self cause code works only out of the custom class if your button is subclass of the default UIButton class and outlet of it   hope this may help anyone wonders why corner radios doesn t apply on my button from code

User · Answer

It is globally method for rounded border of UIButton class func setRoundedBorderButton btn UIButton       btn layer cornerRadius   btn frame size height 2    btn layer borderWidth   0 5    btn layer borderColor   UIColor darkGray cgColor

User · Answer

I have created a simple UIButton sublcass that uses the tintColor for its text and border colours and when highlighted changes its background to the tintColor   class BorderedButton  UIButton    required init  coder aDecoder  NSCoder        super init coder  aDecoder      layer borderWidth   1 0     layer borderColor   tintColor CGColor     layer cornerRadius   5 0     clipsToBounds   true     contentEdgeInsets   UIEdgeInsets top  8  left  8  bottom  8  right  8      setTitleColor tintColor  forState   Normal      setTitleColor UIColor whiteColor    forState   Highlighted      setBackgroundImage UIImage color  tintColor   forState   Highlighted        This makes use of a UIImage extension that creates an image from a colour  I found that code here  https   stackoverflow com a 33675160  It works best when set to type Custom in interface builder as the default System type slightly modifies the colours when the button is highlighted

User · Answer

IBOutlet weak var yourButton  UIButton        didSet          yourButton backgroundColor    clear         yourButton layer cornerRadius   10         yourButton layer borderWidth   2         yourButton layer borderColor   UIColor white cgColor

User · Answer

You can use this subclass of UIButton to customize UIButton as per your needs   visit this github repo for reference  class RoundedRectButton  UIButton        var selectedState  Bool   false      override func awakeFromNib             super awakeFromNib           layer borderWidth   2   UIScreen main nativeScale         layer borderColor   UIColor white cgColor         contentEdgeInsets   UIEdgeInsets top  0  left  5  bottom  0  right  5              override func layoutSubviews            super layoutSubviews           layer cornerRadius   frame height   2         backgroundColor   selectedState   UIColor white   UIColor clear         self titleLabel  textColor   selectedState   UIColor green   UIColor white            override func touchesBegan   touches  Set lt UITouch gt   with event  UIEvent             selectedState    selectedState         self layoutSubviews

User · Answer

IBOutlet weak var button  UIButton         I think for radius just enough this parameter   button layer cornerRadius   5

User · Answer

You can subclass UIButton and add  IBInspectable variables to it so you can configure the custom button parameters via the StoryBoard  Attribute Inspector   Below I write down that code    IBDesignable class BHButton  UIButton                  Only override draw   if you perform custom drawing         An empty implementation adversely affects performance during animation      override func draw   rect  CGRect               Drawing code                    IBInspectable lazy var isRoundRectButton   Bool   false       IBInspectable public var cornerRadius   CGFloat   0 0           didSet              setUpView                         IBInspectable public var borderColor   UIColor   UIColor clear           didSet               self layer borderColor   borderColor cgColor                       IBInspectable public var borderWidth   CGFloat   0 0           didSet               self layer borderWidth   borderWidth                          MARK    Awake From Nib      override func awakeFromNib             super awakeFromNib           setUpView              override func prepareForInterfaceBuilder             super prepareForInterfaceBuilder           setUpView              func setUpView             if isRoundRectButton               self layer cornerRadius   self bounds height 2              self clipsToBounds   true                   else              self layer cornerRadius   self cornerRadius              self clipsToBounds   true

[swift] How can I make a button have a rounded border in Swift?

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