How to detect double-taps on cells in a UICollectionView

Question

I want to respond to double-taps on cells in a UICollectionView, and have a double-tap action cancel cell selection.

This is what I\'ve tried:

UITapGestu         


        

Answer 1

My solution was to not implement collectionView:didSelectItemAtIndexPath but to implement two gesture recognizers.

    self.doubleTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(processDoubleTap:)];
    [_doubleTapGesture setNumberOfTapsRequired:2];
    [_doubleTapGesture setNumberOfTouchesRequired:1];   

    [self.view addGestureRecognizer:_doubleTapGesture];

    self.singleTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(processSingleTap:)];
    [_singleTapGesture setNumberOfTapsRequired:1];
    [_singleTapGesture setNumberOfTouchesRequired:1];
    [_singleTapGesture requireGestureRecognizerToFail:_doubleTapGesture];

    [self.view addGestureRecognizer:_singleTapGesture];

This way I can handle single and double taps. The only gotcha I can see is that the cell is selected on doubleTaps but if this bothers you can you handle it in your two selectors.