How child view will identifie set property of parent view (iPhone)?

Question

The scenario is like,

I have one UIButton in one UIView. So UIView is parent view and UIButton is child view.
Now,

1. If I set user interaction false for parent view then can I click UIButton ?
2. If I am not able to touch UIButton then why UIButton is not touchable?

Can you explain how UIButton will know it's parent view's user interaction is false?

Thanks,

Answer 1

Similar question, check here

1. No, you can't. userInteractionEnabled set to NO on a parent view will prevent to all subviews.

2. Here is the documentation from Appel about "Event Delivery", check the link

3. Check the property self.superView.userInteractionEnabled in hitTest:withEvent: method or pointInside:withEvent: method.