title: How to detect touch end event for UIButton?
body: <p>I want to handle an event occurs when <strong>UIButton</strong> touch is ended. I know that UIControl has some events implementing touches (UIControlEventTouchDown, UIControlEventTouchCancel, etc.). But I can't catch any of them except <strong>UIControlEventTouchDown</strong> and <strong>UIControlEventTouchUpInside</strong>. </p>
  
  <p>My button is a subview of some UIView. That UIView has <strong>userInteractionEnabled</strong> property set to <strong>YES</strong>.</p>
  
  <p>What's wrong?</p>