Hi all, In my application, I added UITapGestureRecognizer in a view (my app's root view). Once tap it, another new view will be added to this superview. In this new view, it consists a button. But what happened is this button cannot work properly, it cannot call its corresponding selector once I click (Touch up inside) it. Anyone know why this happened? So, is it need to remove the UITapGestureRecognizer I added once I tap the superview and add another new view? Anyone has any suggestions? Any comments and suggestions are welcome. Thanks a lot.