How to Add a Double Tap Gesture Recognizer in Swift

How to add a double tap Gesture Recognizer in Swift

I solved this with an extension:

override func viewDidLoad() {
    super.viewDidLoad()
            
    let tapGR = UITapGestureRecognizer(target: self, action: #selector(PostlistViewController.handleTap(_:)))
    tapGR.delegate = self
    tapGR.numberOfTapsRequired = 2
    view.addGestureRecognizer(tapGR)
}

---

extension MainBoardController: UIGestureRecognizerDelegate {
    func handleTap(_ gesture: UITapGestureRecognizer){
        print("doubletapped")
    }
}

Swift Double Tap Recognizer Responding To A Single Tap Recognizer

This may be because of some mismanagement the tap gesture is not able to add for that recognizer. You may not need to send the gesture to the selector function.

Change this

let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(labelClicked(gesture:)))

To

let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(labelClicked))

in addDoubleTabGestureRecognizerToWordLabel()

and remove the receiving parameter in labelClicked().

Hope this helps!

Adding double tap gesture recognizer to UIImageView in an UITableViewCell Swift 4+

You may need

userImage.translatesAutoresizingMaskIntoConstraints = false

as you create constraints programmatically

lazy var userImage: UIImageView = {
      let newView = UIIMageView()
      userImage.translatesAutoresizingMaskIntoConstraints = false
      newView.layer.cornerRadius = 24
      newView.layer.masksToBounds = true
      newView.image = UIImage(named: "samplePic")
      newView.contentMode = .scaleAspectFill
      newView.isUserInteractionEnabled = true 
      let doubleTap = UITapGestureRecognizer(target: self, action: #selector(myFunc))
      doubleTap.numberOfTouchesRequired = 1
      doubleTap.numberOfTapsRequired = 2
      newView.addGestureRecognizer(doubleTap)
      return newView 
}()

also make it a lazy var not a computed property for being 1 instance every access , add the imageView to

self.contentView.addSubView(userImage)  

and set the constraints with it

Is there a way to have a two tap gesture recognizers with different number of taps

you need to make sure that double tap gesture is failed in order to initialize tapToWatch

try this

tapToWatch.require(toFail: doubleLike)

Add single, double and triple tap gestures to all buttons in custom keyboard in swift

create and add the gesture recognizers:

for button in view.subviews {
    // create the gesture recognizer
    let doubleTapRecognizer = UITapGestureRecognizer(target: self, action: "doubleTapCharacter:")
    doubleTapRecognizer.numberOfTapsRequired = 2

    // add gesture recognizer to button
    button.addGestureRecognizer(doubleTapRecognizer)
}

then implement the target method:

func doubleTapCharacter(doubleTapRecognizer: UITapGestureRecognizer) {
    let tappedButton = doubleTapRecognizer.view as! UIButton
    print(tappedButton.titleForState(UIControlState.Normal))
}

Is there any property need to set-up to allow the double-tap (Swift)

Try this:

let tapRec = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap(_:)))
tapRec.delegate = self
tapRec.numberOfTapsRequired = 2
view.userInteractionEnabled = true
view.addGestureRecognizer(tapRec)

And then your function:

extension YourViewController: UIGestureRecognizerDelegate {
    func handleDoubleTap(_ gesture: UITapGestureRecognizer){
        print("doubletapped")
    }
}

Hope this helps!

Allow both single tap gesture recognizer and double tap in UIScrollView

try this code,

Objective - C

 UITapGestureRecognizer *singletap = [[UITapGestureRecognizer alloc]
                                                     initWithTarget:self
                                                     action:@selector(singleTap:)];
    singletap.numberOfTapsRequired = 1;
    singletap.numberOfTouchesRequired = 1;

[scrollView addGestureRecognizer:singletap];


UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]
                                                 initWithTarget:self
                                                 action:@selector(doubleTap:)];
doubleTap.numberOfTapsRequired =2 ;
doubleTap.numberOfTouchesRequired = 1;

[scrollView addGestureRecognizer:doubleTap];



[singleTap requireGestureRecognizerToFail:doubleTap];

Swift 3.0

var singletap = UITapGestureRecognizer(target: self, action: #selector(self.singleTap))
singletap.numberOfTapsRequired = 1
singletap.numberOfTouchesRequired = 1
scrollView.addGestureRecognizer(singletap)
var doubleTap = UITapGestureRecognizer(target: self, action: #selector(self.doubleTap))
doubleTap.numberOfTapsRequired = 2
doubleTap.numberOfTouchesRequired = 1
scrollView.addGestureRecognizer(doubleTap)
singleTap.require(toFail: doubleTap)

Double tap in UIGestureRecognizer

To make a single and double tap gesture work together, the system, upon seeing a single, needs to know if it's really a single or the first half of a double. It must either have knowledge of the future (which would be a very valuable feature) or it must wait and see what comes next. To tell it to wait and see...

singleTap.requireGestureRecognizerToFail(doubleTap)

UITapGestureRecognizer - single tap and double tap

UITapGestureRecognizer *singleTap = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doSingleTap)] autorelease];
singleTap.numberOfTapsRequired = 1; 
[self.view addGestureRecognizer:singleTap];

UITapGestureRecognizer *doubleTap = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doDoubleTap)] autorelease];
doubleTap.numberOfTapsRequired = 2; 
[self.view addGestureRecognizer:doubleTap];

[singleTap requireGestureRecognizerToFail:doubleTap];

Note: If you are using numberOfTouchesRequired it has to be .numberOfTouchesRequired = 1;

For Swift

let singleTapGesture = UITapGestureRecognizer(target: self, action: #selector(didPressPartButton))
singleTapGesture.numberOfTapsRequired = 1
view.addGestureRecognizer(singleTapGesture)

let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(didDoubleTap))
doubleTapGesture.numberOfTapsRequired = 2
view.addGestureRecognizer(doubleTapGesture)

singleTapGesture.require(toFail: doubleTapGesture)

How to accelerate the identification of a single tap over a double tap?

I found the answer on this link

The swift version:

class UIShortTapGestureRecognizer: UITapGestureRecognizer {
    let tapMaxDelay: Double = 0.3

    override func touchesBegan(touches: NSSet!, withEvent event: UIEvent!) {
        super.touchesBegan(touches, withEvent: event)
        delay(tapMaxDelay) {
            // Enough time has passed and the gesture was not recognized -> It has failed.
            if  self.state != UIGestureRecognizerState.Ended {
                self.state = UIGestureRecognizerState.Failed
            }
        }
    }
}

With delay(delay: Double, closure:()->()):

class func delay(delay:Double, closure:()->()) {
        dispatch_after(dispatch_time( DISPATCH_TIME_NOW, Int64(delay * Double(NSEC_PER_SEC))), dispatch_get_main_queue(), closure)
    }

---

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