Double touch on UIButton

Question

How to recognize double touch on UIButton ?

Double touching is not a standard, nor an obvious UIButton behavior. You should reconsider why you're needing this action. — Gavin Miller, Nov 05 '10 at 20:05

score 48 · Accepted Answer · edited Aug 01 '17 at 12:20

48

Add an target-action for the control event UIControlEventTouchDownRepeat, and do action only when the touch's tapCount is 2.

Objective-C:

[button addTarget:self action:@selector(multipleTap:withEvent:) 
             forControlEvents:UIControlEventTouchDownRepeat];

...

-(IBAction)multipleTap:(id)sender withEvent:(UIEvent*)event {
   UITouch* touch = [[event allTouches] anyObject];
   if (touch.tapCount == 2) {
     // do action.
   }
}

As @Gavin commented, double-tap on a button is an unusual gesture. On the iPhone OS double-tap is mostly used for zoomable views to zoom into/out of a region of focus. It may be unintuitive for the users if you make the gesture to perform other actions.

Swift 3:

button.addTarget(self, action: #selector(multipleTap(_:event:)), for: UIControlEvents.touchDownRepeat)

And then:

func multipleTap(_ sender: UIButton, event: UIEvent) {
    let touch: UITouch = event.allTouches!.first!
    if (touch.tapCount == 2) {
        // do action.
    }
}

edited Aug 01 '17 at 12:20

Anh Pham

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answered Nov 05 '10 at 20:07

kennytm

510,854
105
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1

Thanks, this is a clean solution – Aitul Oct 15 '12 at 15:06
This could be useful for preventing unwanted double taps. For example if you're making a request to a server. – johnnymire May 08 '14 at 18:15
@johnnymire: You could as well immediately disable the button after the first click. – kennytm May 08 '14 at 19:11
Thanks for the solution. I tried it in swift, but I get error: Value of type 'Set?' has no member ‘anyObject’, and I don’t know how to fix this, any suggestions? Many Thanks! This is what I tried: var button: UIButton = button.addTarget(self, action: "multipleTap:withEvent:", forControlEvents: .TouchDownRepeat) ... @IBAction func multipleTap(sender: AnyObject, withEvent event: UIEvent) { var touch: UITouch = event.allTouches().anyObject() if touch.tapCount == 2 { // do action. } } – theMouse Nov 26 '15 at 23:44
@theMouse: See http://stackoverflow.com/questions/29584365/setnsobject-does-not-have-a-member-named-anyobject-xcode-6-3. – kennytm Nov 27 '15 at 02:39
@kennytm. I took the liberty of typing in the latest swift syntax. as always feel free to edit, unwind etc, cheers – Fattie Feb 24 '17 at 20:42
@kennytm, nice solution.. still working on iOS13.7... +1 for you. – Vatsal Shukla Feb 24 '22 at 13:35

Wimukthi Rajapaksha · Answer 2 · 2020-10-19T06:02:40.880

If you are working with swift 5, @kennytm's solution won't work. So you can write an objective-c/swift function and add it as gesture with number of desired taps.

let tap = UITapGestureRecognizer(target: self, action: #selector(doubleTapped))
tap.numberOfTapsRequired = 2
btn.addGestureRecognizer(tap)

and then

@objc func doubleTapped() {
    // your desired behaviour.
}

Here button can be tapped any number of times and it will show as tapped. But the above function won't execute until button tapped for required number of times.

score 1 · Answer 3 · answered Jun 04 '19 at 20:44

[button addTarget:self action:@selector(button_TouchDown:) forControlEvents:UIControlEventTouchDown];
[button addTarget:self action:@selector(button_TouchDownRepeat:withEvent:) forControlEvents:UIControlEventTouchDownRepeat];

-(void)button_one_tap:(UIButton*) button
{
    NSLog(@"button_one_tap");
}
-(void)button_double_tap:(UIButton*) button
{
    NSLog(@"button_double_tap");

}

-(void)button_TouchDown:(UIButton*) button
{
    NSLog(@"button_TouchDown");
    [self performSelector:@selector(button_one_tap:) withObject:button afterDelay:0.3 /*NSEvent.doubleClickInterval maybe too long*/];
}
-(void)button_TouchDownRepeat:(UIButton*) button withEvent:(UIEvent*)event {
    NSLog(@"button_TouchDownRepeat");

    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(button_one_tap:) object:button];

    UITouch* touch = [[event allTouches] anyObject];
    //NSLog(@"touch.tapCount = %ld", touch.tapCount);
    if (touch.tapCount == 2) {
        // do action.
        [self button_double_tap:button];
    }
}

score 0 · Answer 4 · edited Mar 31 '16 at 08:36

0

try to use this for the button event

UIControlEventTouchDownRepeat

edited Mar 31 '16 at 08:36

itsji10dra

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answered Oct 30 '12 at 11:16

mohammad alabid

444
7
21

score -1 · Answer 5 · answered Jan 26 '16 at 06:44

@IBOutlet weak var button: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()

    button.addTarget(self, action: "didTap:", forControlEvents: .TouchUpInside)
    button.addTarget(self, action: "didDoubleTap:", forControlEvents: .TouchDownRepeat)

}

var ignoreTap = false
func didTap(sender: UIButton) {
    if ignoreTap {
        ignoreTap = false
        print("ignoretap", sender)
        return
    }
    print("didTap", sender)
}

func didDoubleTap(sender: UIButton) {
    ignoreTap = true
    print("didDoubleTap", sender)
}

Double touch on UIButton

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