title: UITapGestureRecognizer on a UIButton
body: <p>I have a UIButton which has an IBAction as well as a UITapGestureRecognizer to detect double taps. </p>
  
  <p>At the moment it looks like the IBAction is blocking the recognizer. Is there a way to stop this or do  UITapGestureRecognizer even work on buttons? If so wouldn't it be better to just add the recognizers and remove the IBActions?</p>
  
  <p>EDIT</p>
  
  <pre><code>UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget : self action : @selector (handleDoubleTap:)];
  [doubleTap setNumberOfTapsRequired:2];
  [A1 addGestureRecognizer:doubleTap];
  [A2 addGestureRecognizer:doubleTap];
  [B1 addGestureRecognizer:doubleTap];
  </code></pre>