UITapGestureRecognizer - single tap and double tap

Question

I am trying to add 2 UITapGestureRecognizers to a view  one for single tap and one for double tap events   The single tap recognizer is working as expected  on its own    But I don t seem to be able to get the double tap recognizer working   Have tried to experiment with properties like   cancelsTouchesInView  delaysTouchesBegan and delaysTouchesEnded but still doesn t work   When I double tap  the single tap recognizer would always be activated and the double tap event would also be sent to the super view   But the custom double tap recognizer does not seem to be notified at all   Documentations seem to suggest that the 3 properties mentioned above could be used for the purpose   But I am just not sure what values should be set and on which recognizer s   single  double or both    Hope somebody familiar with this could help   The following is the latest updated code block              gesture recognizers         -  void addSingleAndDoubleTapGestureRecognizersToView  UIView   view          single tap         UITapGestureRecognizer  singleTapRecognizer     UITapGestureRecognizer alloc  initWithTarget  tableViewController action   selector handleSingleTapOnView                                           singleTapRecognizer setNumberOfTouchesRequired 1        view addGestureRecognizer  singleTapRecognizer           double tap      UITapGestureRecognizer  doubleTapRecognizer     UITapGestureRecognizer alloc  initWithTarget  tableViewController action   selector  handleDoubleTapOnView                  doubleTapRecognizer setNumberOfTouchesRequired 2                 singleTapRecognizer requireGestureRecognizerToFail  doubleTapRecognizer        view addGestureRecognizer  doubleTapRecognizer               -  void handleSingleTapOnView  id sender       -  void handleDoubleTapOnView  id sender

User · Answer

Swift 3 solution   let singleTap   UITapGestureRecognizer target  self  action  selector self singleTapAction       singleTap numberOfTapsRequired   1 view addGestureRecognizer singleTap   let doubleTap   UITapGestureRecognizer target  self  action  selector self doubleTapAction       doubleTap numberOfTapsRequired   2 view addGestureRecognizer doubleTap   singleTap require toFail  doubleTap    In the code line singleTap require toFail  doubleTap  we are forcing the single tap to wait and ensure that the tap event is not a double tap

User · Answer

Solution for Swift 2   let singleTapGesture   UITapGestureRecognizer target  self  action   selector handleSingleTap   singleTapGesture numberOfTapsRequired   1    Optional for single tap view addGestureRecognizer singleTapGesture   let doubleTapGesture   UITapGestureRecognizer target  self  action   selector handleDoubleTap   doubleTapGesture numberOfTapsRequired   2 view addGestureRecognizer doubleTapGesture   singleTapGesture requireGestureRecognizerToFail doubleTapGesture

User · Answer

----firstly you have to alloc the double and single tap gesture-------    UITapGestureRecognizer  doubleTap     UITapGestureRecognizer alloc  initWithTarget   self action    selector  handleDoubleTap      UITapGestureRecognizer  singleTap     UITapGestureRecognizer alloc  initWithTarget   self action    selector  handleSingleTap       singleTap requireGestureRecognizerToFail   doubleTap    doubleTap setDelaysTouchesBegan   YES    singleTap setDelaysTouchesBegan   YES       -----------------------number of tap----------------       doubleTap setNumberOfTapsRequired   2    singleTap setNumberOfTapsRequired   1       ------- add double tap and single tap gesture on the view or button--------     self view addGestureRecognizer   doubleTap    self view addGestureRecognizer   singleTap

User · Answer

Not sure if that s exactly what are you looking for  but I did single double taps without gesture recognizers  I m using it in a UITableView  so I used that code in the didSelectRowAtIndexPath method      tapCount        switch  tapCount                case 1    single tap              self performSelector  selector singleTap   withObject  indexPath afterDelay  0 2               break          case 2    double tap              NSObject cancelPreviousPerformRequestsWithTarget self selector  selector singleTap   object indexPath                self performSelector  selector doubleTap   withObject  indexPath               break          default              break            if  tapCount gt 2  tapCount 0    Methods singleTap and doubleTap are just void with NSIndexPath as a parameter   -  void singleTap  NSIndexPath   indexPath       do your stuff for a single tap    -  void doubleTap  NSIndexPath   indexPath       do your stuff for a double tap     Hope it helps

User · Answer

Some view have there own double tap recognizers built in  MKMapView being an example    To get around this you will need to implement UIGestureRecognizerDelegate method shouldRecognizeSimultaneouslyWithGestureRecognizer and return YES   First implement your double and single recognizers      setup gesture recognizers UITapGestureRecognizer  singleTapRecognizer     UITapGestureRecognizer alloc  initWithTarget self                                                                                 action  selector mapViewTapped     singleTapRecognizer delegate   self  singleTapRecognizer numberOfTapsRequired   1    UITapGestureRecognizer  doubleTapRecognizer     UITapGestureRecognizer alloc  initWithTarget self                                                                                       action  selector mapViewDoubleTapped     doubleTapRecognizer delegate   self        this allows doubleTapRecognizer numberOfTapsRequired   2   singleTapRecognizer requireGestureRecognizerToFail doubleTapRecognizer     And then implement    pragma mark UIGestureRecognizerDelegate -  BOOL gestureRecognizer  UIGestureRecognizer   gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer  UIGestureRecognizer   otherGestureRecognizer    return YES

User · Answer

I implemented UIGestureRecognizerDelegate methods to detect both singleTap and doubleTap   Just do this     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        singleTap requireGestureRecognizerToFail doubleTap        self headerView addGestureRecognizer singleTap     Then implement these delegate methods   -  BOOL gestureRecognizer  UIGestureRecognizer   gestureRecognizer shouldReceiveTouch  UITouch   touch      return  YES     -  BOOL gestureRecognizer  UIGestureRecognizer   gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer  UIGestureRecognizer   otherGestureRecognizer      return YES

User · Answer

In reference to  stanley s comment -   Don t try and use tap gestures to row selections to work in UITableView as it already has full tap handling       But you must set  Cancels Touches in View  to  NO  on your single tap gesture recognizers or it will never get the tap events

User · Answer

You need to use the requireGestureRecognizerToFail  method  Something like this    singleTapRecognizer requireGestureRecognizerToFail doubleTapRecognizer

User · Answer

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

[ios] UITapGestureRecognizer - single tap and double tap

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