Question

+-----------------------+  +--------------------+
| A                     |  | A                  |
| +-------------------+ |  | +----------------+ |
| |B                  | |  | | C              | |
| |                   | |  | |                | |
| +-------------------+ |  | +----------------+ |
+-----------------------+  +--------------------+

I have a view hierarchy as above.
(Each of B and C takes up whole space of A, Each of them are screen size. B is added first and C is added next)

For a reason, C is getting a touch event for scroll effect
(B is cocos2d-x layer and C(scroll view) sets the B’s position when scrollViewDidScroll
http://getsetgames.com/2009/08/21/cocos2d-and-uiscrollview/
)

And I want to pass touch event to B or it’s subviews when it’s not scrolling.

How can I pass the touch event to B here?

Answer 1

This same problem is covered in the WWDC 2012 scroll view session.

Steps are..

1. You hide your scrollview.
2. place dummy view where scrollview would be and attach scrollview's panGestureRecognizer to this view.

lo and behold touch goes to the view behind the dummy view when it’s not scrolling.