How to detect tap and double tap at same time using UITapGestureRecognizer?

Question

For example I have a view where I want two different gestures:

tap to do action A. double tap to do action B.

The problem is with UITapGestureRecognizer I can only set minimum required tap count. The single tap gesture recognizer recognizes a tap before the double tap gesture recognizer recognizes the double tap.

Example:

_tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureRecognized:)];
_tapGestureRecognizer.numberOfTouchesRequired = 1;
_tapGestureRecognizer.numberOfTapsRequired = 1;
[self addGestureRecognizer:_tapGestureRecognizer];

_doubleTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTapGestureRecognized:)];
_doubleTapGestureRecognizer.numberOfTouchesRequired = 1;
_doubleTapGestureRecognizer.numberOfTapsRequired = 2;
[self addGestureRecognizer:_doubleTapGestureRecognizer];

It always recognizes the single tap even if I do double tap very fast. How can I set it up so the tap gesture recognizer waits and sees if the double tap gesture recognizer recognizes?

Possible solution and duplicated: http://stackoverflow.com/questions/7175086/iphone-single-tap-gesture-conflicts-with-double-one — xarly, Oct 01 '13 at 23:15
Try this to remove the delay or adjust it to which you want. http://stackoverflow.com/a/25368653/3060790 — Pagly, Aug 18 '14 at 17:30

score 49 · Accepted Answer · answered Oct 01 '13 at 23:13

49

Here is what I have used in one of my old projects, I hope it helps you out man.

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];

answered Oct 01 '13 at 23:13

Adrian P

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10

this Works but, for Single Tap it Makes Delay on Call of Single tap – Mrug Mar 07 '14 at 08:01
1

^^ Has anyone figured out a solution to this delay? – barfoon Aug 11 '14 at 18:04
For those like @barfoon who still have the delay to cancel the double tap, please refer to this solution by eladleb : http://stackoverflow.com/a/23415324/1158074 and use the subclass for the double tap gesture so it sends "state failed" faster. – Michael Pirotte Dec 04 '15 at 13:47

pableiros · Answer 2 · 2017-10-31T15:14:15.653

7

On swift 3 and swift 4:

let singleTap = UITapGestureRecognizer(target: self, action: #selector(doSingleTap))
singleTap.numberOfTapsRequired = 1

self.view.addGestureRecognizer(singleTap)

let doubleTap = UITapGestureRecognizer(target: self, action: #selector(doDoubleTap))
doubleTap.numberOfTapsRequired = 2

self.view.addGestureRecognizer(doubleTap)

singleTap.require(toFail: doubleTap)

edited Oct 31 '17 at 15:14

answered Nov 02 '16 at 04:41

pableiros

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I use singleTap.requireGestureRecognizerToFail(doubleTap) instead of singleTap.require(toFail: doubleTap) – Marcos Jan 10 '17 at 12:58
The answer is for Swift 3 @Marcos – Logan Apr 03 '17 at 22:20

iPhoneDeveloper · Answer 3 · 2017-05-11T05:21:18.273

   {  UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleDoubleTapGesture:)];
        [doubleTap setDelegate:self];
        doubleTap.numberOfTapsRequired = 2;
        [self.headerView addGestureRecognizer:doubleTap];

        UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleSingleTapGesture:)];
        singleTap.numberOfTapsRequired = 1;
        [singleTap setDelegate:self];
        [doubleTap setDelaysTouchesBegan:YES];
        [singleTap setDelaysTouchesBegan:YES];
        [self.headerView addGestureRecognizer:singleTap];
  }  
        - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
            return  YES;
        }

    - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
        return YES;
    }

Create the gesture recognizers inside any method you want. For example if you want tap gestures for your headerView in tableView create those tap gestures inside

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section

And your class should implement UIGestureRecognizerDelegate. Above mentioned are the 2 methods of that delegate class.

Some explanations would significantly improve the quality of your answer. — mrun, May 10 '17 at 14:06

score 0 · Answer 4 · answered Jan 04 '23 at 16:05

Another option is to use UIGestureRecognizerDelegate, especially if you do not have easy access to the other recognizer.

let singleTap = UITapGestureRecognizer(target: self, action: #selector(doSingleTap))
singleTap.numberOfTapsRequired = 1
singleTap.delegate = self
self.view.addGestureRecognizer(singleTap)

Implement the delegate:

extension ViewController: UIGestureRecognizerDelegate {
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRequireFailureOf otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        if let tapGesture = gestureRecognizer as? UITapGestureRecognizer, let otherTapGesture = otherGestureRecognizer as? UITapGestureRecognizer {
            return tapGesture.numberOfTapsRequired == 1 && otherTapGesture.numberOfTapsRequired == 2
        }
        return false
    }
}

score -1 · Answer 5 · answered Jun 15 '15 at 18:42

I found a solution to the delay of the single tap using XCode Monkey's answer. Using this approach, you can configure in mili-seconds the threshold between a single and a double tap. This technique uses a simple UIButton and a NSTimer to differentiate between single and double tap.

@property NSTimer       *tapTimer;
@property BOOL           isDoubleTap;

  UIButton *yourButton = [UIButton new];
  yourButton.frame = // set your frame
  [yourButton addTarget:self action:@selector(handleTap:) forControlEvents:UIControlEventTouchUpInside];
  [self.view yourButton];


-(void)handleTap:(UIButton*)button
{
  [self.tapTimer invalidate];

  if (self.isDoubleTap)
  {
    [self doDoubleTap];
    return;
  }
  self.isDoubleTap = YES;
  // CHANGE THE 0.3 SECOND THRESHOLD BETWEEN SINGLE/DOUBLE TAP TO YOUR HEART'S CONTENT
  self.tapTimer = [NSTimer scheduledTimerWithTimeInterval:0.3 target:self selector:@selector(doSingleTap) userInfo:nil repeats:NO];
}

-(void)doSingleTap
{
  self.isDoubleTap = NO;
}

-(void)doDoubleTap
{
  self.isDoubleTap = NO;
}

No improvement in delay AND creates potential problems with users clicking multiple cells in less than .3 seconds — ChuckKelly, Oct 08 '15 at 06:21
You either have to keep a significant (0.2) delay or else double tap detection fails to register before single tap timer expires. — Jeet, May 19 '16 at 07:22

How to detect tap and double tap at same time using UITapGestureRecognizer?

5 Answers5