How to call gesture tap on UIView programmatically in swift

Question

I have a UIView and and I have added tap gesture to it    let tap   UITapGestureRecognizer target  self  action  Selector  handleTap     tap delegate   self myView addGesture tap    I am trying to call it programmatically in the testfile   sendActionForEvent   I am using this function  but it is not working   myView sendActionForEvent UIEvents touchUpDown    It shows unrecognised selector sent to instance   How can I solve this problem

User · Answer

For Swift 4   let tap   UITapGestureRecognizer target  self  action   selector self handleTap        view addGestureRecognizer tap   view isUserInteractionEnabled   true  self view addSubview view      function which is triggered when handleTap is called  objc func handleTap   sender  UITapGestureRecognizer        print  Hello World       In Swift 4  you need to explicitly indicate that the triggered function is callable from Objective-C  so you need to add  objc too your handleTap function   See  Ali Beadle  s answer here  Swift 4 add gesture  override vs  objc

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Swift 5 1 Example for three view  Step 1 -  Add storyboard view and add outlet viewController UIView   IBOutlet var firstView  UIView   IBOutlet var secondView  UIView   IBOutlet var thirdView  UIView    Step 2 -  Add storyBoard view Tag      Step 3 -  Add gesture  override func viewDidLoad             super viewDidLoad            firstView addGestureRecognizer UITapGestureRecognizer target  self  action   selector self tap                firstView isUserInteractionEnabled   true         secondView addGestureRecognizer UITapGestureRecognizer target  self  action   selector self tap                secondView isUserInteractionEnabled   true         thirdView addGestureRecognizer UITapGestureRecognizer target  self  action   selector self tap                thirdView isUserInteractionEnabled   true         Step 4 -  select view   objc func tap   gestureRecognizer  UITapGestureRecognizer            let tag   gestureRecognizer view  tag         switch tag            case 1               print  select first view           case 2               print  select second view           case 3               print  select third view           default              print  default

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Here is the simplest way to add Gestures on View in Swift 5  import UIKit  class ViewController  UIViewController        override func viewDidLoad             super viewDidLoad           addGestures                 MARK  Add Gestures to target view     func addGestures                    1  Single Tap or Touch         let tapGesture   UITapGestureRecognizer target  self  action   selector self tapGetstureDetected           tapGesture numberOfTapsRequired   1         view addGestureRecognizer tapGesture             2  Double Tap         let doubleTapGesture   UITapGestureRecognizer target  self  action   selector self doubleTapGestureDetected           doubleTapGesture numberOfTapsRequired   2         view addGestureRecognizer doubleTapGesture             3  Swipe         let swipeGesture   UISwipeGestureRecognizer target  self  action   selector self swipeGetstureDetected           view addGestureRecognizer swipeGesture             4  Pinch         let pinchGesture   UIPinchGestureRecognizer target  self  action   selector self pinchGetstureDetected           view addGestureRecognizer pinchGesture             5  Long Press         let longPressGesture   UILongPressGestureRecognizer target  self  action   selector self longPressGetstureDetected           view addGestureRecognizer longPressGesture             6  Pan         let panGesture   UILongPressGestureRecognizer target  self  action   selector self panGestureDetected           view addGestureRecognizer panGesture                 MARK  Handle Gesture detection      objc func swipeGetstureDetected             print  Swipe Gesture detected                 objc func tapGetstureDetected             print  Touch Tap Gesture detected                 objc func pinchGetstureDetected             print  Pinch Gesture detected                 objc func longPressGetstureDetected             print  Long Press Gesture detected                 objc func doubleTapGestureDetected             print  Double Tap Gesture detected                 objc func panGestureDetected                 print  Pan Gesture detected                   MARK  Shake Gesture     override func becomeFirstResponder   - gt  Bool           return true           override func motionEnded   motion  UIEvent EventSubtype  with event  UIEvent            if motion     motionShake                       print  Shake Gesture Detected

User · Answer

Swift 4  First  create an object of UITapGestureRecognizer  var tapGesture   UITapGestureRecognizer     The second step is to initialise UITapGestureReconizer  Enable the user    interaction  then add it   override func viewDidLoad             super viewDidLoad       tapGesture   UITapGestureRecognizer target  self  action   selector YourViewController myviewTapped                   infosView isUserInteractionEnabled   true             infosView addGestureRecognizer tapGesture  view addSubview infosView      Third  create a method   objc func myviewTapped   recognizer  UIGestureRecognizer                    print  button is tapped

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This is how it works in Swift 3     IBOutlet var myView  UIView  override func viewDidLoad         super viewDidLoad        let tap   UITapGestureRecognizer target  self  action  selector handleTap        myView addGestureRecognizer tap     func handleTap         print  tapped

User · Answer

Swift 4  let tap   UITapGestureRecognizer target  self  action   selector self touchTapped           self view addGestureRecognizer tap    objc func touchTapped   sender  UITapGestureRecognizer

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Inside ViewDidLoad  let tapGestureRecognizer   UITapGestureRecognizer target  self  action   selector imageTapped tapGestureRecognizer         self imgMainAdView isUserInteractionEnabled   true     self imgMainAdView addGestureRecognizer tapGestureRecognizer            MARK  - Image Tap Method -  objc func imageTapped tapGestureRecognizer  UITapGestureRecognizer        print  Tapped       if let url   URL string  self strMAinAdvLink                UIApplication shared open url  options                    Calling Purpose    IBAction func btnCall1Action   sender  Any        let text   self strPhoneNumber1      let test   String text filter      -    contains  0         UIApplication shared openURL NSURL string   tel     test     as URL         Mail Purpose   MFMailComposeViewControllerDelegate    IBAction func btnMailAction   sender  Any        let strEmail   SAFESTRING str    self dictEventDetails  value forKeyPath   Email value text email   as  String        if  MFMailComposeViewController canSendMail                 AppDelegate sharedInstance   showAlertAction strTitle   OK   strMessage   Mail services are not available      success  in                   return           let composeVC   MFMailComposeViewController       composeVC mailComposeDelegate   self     composeVC setToRecipients  strEmail       composeVC setSubject         composeVC setMessageBody     isHTML  false      self present composeVC  animated  true  completion  nil    func mailComposeController   controller  MFMailComposeViewController  didFinishWith result  MFMailComposeResult  error  Error         controller dismiss animated  true  completion  nil

User · Answer

Try the following swift code  tested in Xcode 6 3 1        import UIKit      class KEUITapGesture150427   UIViewController         var  myTap  UITapGestureRecognizer        var  myView  UIView         override func viewDidLoad             super viewDidLoad           view backgroundColor   UIColor whiteColor              myTap   UITapGestureRecognizer target  self   action  Selector   myHandleTap              myTap  numberOfTapsRequired   1           myView   UIView frame  CGRectMake 100  200  100  100            myView  backgroundColor UIColor blueColor            myView  layer cornerRadius   20          myView  layer borderWidth   1          myView  addGestureRecognizer  myTap           view addSubview  myView                  func  myHandleTap sender  UITapGestureRecognizer            if sender state     Ended             println   myHandleTap sender state     Ended              sender view  backgroundColor             UIColor red  CGFloat drand48     green  CGFloat drand48     blue  CGFloat drand48     alpha  1 0                             Note that your target could be any subclass of UIResponder  see  tested in Xcode 6 3 1         import UIKit      class MyTapTarget    UIResponder         func  myHandleTap2 sender  UITapGestureRecognizer            if sender state     Ended             println   myHandleTap2 sender state     Ended              sender view  backgroundColor               UIColor red  CGFloat drand48     green  CGFloat drand48     blue  CGFloat drand48     alpha  1 0                                class KEUITapGesture150427b   UIViewController         var  myTap  UITapGestureRecognizer        var  myView  UIView        var  myTapTarget  MyTapTarget         override func viewDidLoad             super viewDidLoad           view backgroundColor   UIColor whiteColor              myTapTarget   MyTapTarget            myTap   UITapGestureRecognizer target   myTapTarget    action  Selector   myHandleTap2              myTap  numberOfTapsRequired   1           myView   UIView frame  CGRectMake 100  200  100  100            myView  backgroundColor UIColor blueColor            myView  layer cornerRadius   20          myView  layer borderWidth   1          myView  addGestureRecognizer  myTap           view addSubview  myView

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Complete answer for Swift 4  Step 1  create an outlet for the view    IBOutlet weak var rightViewOutlet  UIView    Step 2  define a tap gesture  var tapGesture   UITapGestureRecognizer     Step 3  create ObjC function  called when view tapped    objc func rightViewTapped   recognizer  UIGestureRecognizer        print  Right button is tapped       Step 4  add the following within viewDidLoad    let rightTap   UITapGestureRecognizer target  self  action   selector ViewController rightViewTapped           rightViewOutlet addGestureRecognizer rightTap

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For anyone looking to activate a views tap gesture recognizer without having direct access to the gesture recognizer    when returning to a page I had to fill bubbles that were previously filled by tapping  I kept track of those bubbles tags  bubs      func fillBubs bubs   Int         for bub in bubs           let bubble   view viewWithTag bub          if bubble    nil  continue          for g in bubble  gestureRecognizers                let tap   g as  UITapGestureRecognizer             handleBub tap                      objc func handleBub   sender  UITapGestureRecognizer    nil        let bubble   sender  view      bubble  layer backgroundColor    colorLiteral red  0  green  0  blue  0  alpha  1

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Just a note - Don t forget to enabled interaction on the view   let tap   UITapGestureRecognizer target  self  action   selector handleTap    view addGestureRecognizer tap      view userInteractionEnabled   true  self view addSubview view

User · Answer

try the following extension      extension UIView        func  addTapGesture action    escaping   - gt Void            let tap   MyTapGestureRecognizer target  self   action   selector self handleTap               tap action   action         tap numberOfTapsRequired   1          self addGestureRecognizer tap          self isUserInteractionEnabled   true             objc func handleTap   sender  MyTapGestureRecognizer            sender action             class MyTapGestureRecognizer  UITapGestureRecognizer       var action      - gt Void     nil     and then use it    submitBtn addTapGesture          your code     you can even use it for cell   cell addTapGesture          your code

User · Answer

You need to initialize UITapGestureRecognizer with a target and action  like so   let tap   UITapGestureRecognizer target  self  action   selector self handleTap       myView addGestureRecognizer tap    Then  you should implement the handler  which will be called each time when a tap event occurs    objc func handleTap   sender  UITapGestureRecognizer    nil           handling code     So now calling your tap gesture recognizer event handler is as easy as calling a method   handleTap

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let tap   UITapGestureRecognizer target  self  action  Selector  handleFrontTap         frontView addGestureRecognizer tap      Make sure this is not private func handleFrontTap gestureRecognizer  UITapGestureRecognizer        print  tap working

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If you want Objective C code is given below   UITapGestureRecognizer  gesRecognizer     UITapGestureRecognizer alloc  initWithTarget self action  selector handleTap        Declare the Gesture  gesRecognizer delegate   self   yourView addGestureRecognizer gesRecognizer      Add Gesture to your view      Declare the Gesture Recognizer handler method   -  void handleTap  UITapGestureRecognizer   gestureRecognizer     NSLog   Tapped        or you want swift code is given below   import UIKit class ViewController  UIViewController         IBOutlet weak var myView  UIView       override func viewDidLoad             super viewDidLoad               Add tap gesture recognizer to view         let tapGesture   UITapGestureRecognizer target  self  action  Selector  handleTap             myView addGestureRecognizer tapGesture                this method is called when a tap is recognized     func handleTap sender  UITapGestureRecognizer             print  tap

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For anyone who is looking for Swift 3 solution  let tap   UITapGestureRecognizer target  self  action   selector self handleTap        view addGestureRecognizer tap   view isUserInteractionEnabled   true  self view addSubview view      function which is triggered when handleTap is called  func handleTap   sender  UITapGestureRecognizer         print  Hello World

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Instead of invoking myView s UITapGestureRecognizer  you can directly call the handleTap function

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I worked out on Xcode 7 3 1 on Swift 2 2  See below   func addTapGesture         let tap   UITapGestureRecognizer target  self  action   selector MyViewController handleTap       tap numberOfTapsRequired   1     self myView addGestureRecognizer tap     func handleTap            Your code here

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STEP   1   IBOutlet var viewTap  UIView    STEP   2  var tapGesture   UITapGestureRecognizer     STEP   3   override func viewDidLoad         super viewDidLoad          TAP Gesture     tapGesture   UITapGestureRecognizer target  self  action   selector ViewController myviewTapped           tapGesture numberOfTapsRequired   1     tapGesture numberOfTouchesRequired   1     viewTap addGestureRecognizer tapGesture      viewTap isUserInteractionEnabled   true     STEP   4  func myviewTapped   sender  UITapGestureRecognizer         if self viewTap backgroundColor    UIColor yellow           self viewTap backgroundColor   UIColor green      else          self viewTap backgroundColor   UIColor yellow           OUTPUT

User · Answer

Implementing tap gesture let tap  UITapGestureRecognizer   UITapGestureRecognizer target  self  action   quot touchHappen quot    view userInteractionEnabled   true view addGestureRecognizer tap   Calls this function when the tap is recognized  func touchHappen           Causes the view  or one of its embedded text fields  to resign the first responder status      self view endEditing true     Update for For Swift 3   let tap   UITapGestureRecognizer target  self  action   selector self touchHappen       yourView addGestureRecognizer tap  yourView userInteractionEnabled   true  func touchHappen   sender  UITapGestureRecognizer        print  quot Hello Dear you are here quot

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I worked out on Xcode 6 4 on swift   See below   var view1  UIView   func assignTapToView1                 let tap   UITapGestureRecognizer target  self  action  Selector  handleTap          tap delegate   self   view1 addGestureRecognizer tap    self view  addSubview view1          func handleTap      print  tap working    view1 removeFromSuperview       view1 alpha   0 1

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I wanted to specify two points which kept causing me problems     I was creating the Gesture Recognizer on init and storing it in a let property  Apparently  adding this gesture recog to the view does not work  May be self object passed to the gesture recognizer during init  is not properly configured   The gesture recognizer should not be added to views with zero frames  I create all my views with zero frame and then resize them using autolayout  The gesture recognizers have to be added AFTER the views have been resized by the autolayout engine  So I add the gesture recognizer in viewDidAppear and they work

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xCode 9 3  Swift 4 0  class BaseVC  UIViewController  UIGestureRecognizerDelegate            IBOutlet weak var iView  UIView         override func viewDidLoad               super viewDidLoad             let clickUITapGestureRecognizer   UITapGestureRecognizer target  self  action   selector self onSelect                 clickUITapGestureRecognizer delegate   self           iView  addGestureRecognizer tap                 func gestureRecognizer   gestureRecognizer  UIGestureRecognizer  shouldReceive touch  UITouch  - gt  Bool             return true                 IBAction func onSelect   sender  Any

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You need to initialize UITapGestureRecognizer with a target and action  like so   let tap   UITapGestureRecognizer target  self  action   handleTap    tap delegate   self myView addGestureRecognizer tap    Then  you should implement the handler  which will be called each time when a tap event occurs   func handleTap sender  UITapGestureRecognizer         handling code

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