UITapGestureRecognizer on UIScrollView

Question

I setup a UITapGestureRecognizer on a UIScrollView in the storyboard. The Scroll View contains other contents (two UIView, one UIWebView).

The Gesture Recognizer properties are as follows:

• Action: dismissPopover
• delegate: postViewController
• gestureRecognizers: Scroll View
• state: enabled
• numberOfTapsRequired: 1
• numberOfTouchesRequired: 1
• cancelTouchesInView: YES
• delayTouchesBegan: NO
• delayTouchesEnded: YES

The Scroll View (relevant) properties are as follows:

• userInteractionEnabled: YES
• canCancelContentTouches: YES

However, when I tap anywhere on the Scroll View, the gesture does not work.

Answer 1

The scroll view has it's own gesture recognizer.

You'll need to override that gesture recognizer or disable that first.

Then and then only, your gesture recognizer will work.

The better way to do this is to use the tap gesture inside the scroll view rather than adding your gesture recognizer.

Answer 2

The delegate class (conforming to UIGestureRecognizerDelegate) must implement

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

This way, the tap gesture will work.