iOS UIScrollView cancel UIButton touch on scroll

 

I have some UIButtons within a UIScrollView, but I do not want to delay the button touches. However, as soon as the scroll view detects a drag/scroll, I want to cancel the UIButton touch and proceed with the scrolling of the UIScrollView.

I have included the following... 

_scrollView.delaysContentTouches = NO;

...but (obviously) the button touch does not cancel when dragged. Does anyone have any suggestions as to how I can implement this functionality?

You can override this method of UIScrollView . 

-(BOOL)touchesShouldCancelInContentView:(UIView *)view
{   
    return YES;
}

And in your UIButton, you should add different method for different control events.

  • show highlight effect for UIControlEventTouchDown .
  • trigger button for UIControlEventTouchUpInside | UIControlEventTouchUpOutside UIControlEventTouchUpInside | UIControlEventTouchUpOutside ;
  • clear highlight effect for UIControlEventTouchCancel .

    • You could use scrollViewWillBeginDragging to fire off a notification and handle the button canceling by listening for it in your buttons' code. I think this is what you are trying to do, but I'm not sure if I have understood your question correctly.

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