limiting the touchable area in a UIButton in IPhone?

Question

I have three custom buttons with non-rectangular images close to each other in my view. Then I have a problem with touchable area's of each button overlap with other buttons. So how can I limit the touchable area of each buttons to get the corresponding actions?

Answer 1

You can overwrite -pointInside:withEvent:, that internally will be used for hit testing.

A nice project using this technique is OBShapedButton, where transparent pixel will not trigger a hit.

Answer 2

Use two components. A UIImageView with a smaller UIButton on top.