title: UIView handle only double tap
body: <p>I want my view to handle only double tap gestures. The rest of the gestures should be forwarded to its superview. How could this be achieved?
  I tried the <code>pointsInside</code> override trick but it forwards all the touches.</p>
  
  <p><strong>Edit:</strong></p>
  
  <p>Also the superview may or may not decide to handle the touches (it might decide to forward them to other views).
  Actually what I am trying to achieve is to have a <code>UIWindow</code> over the initial one that reacts only to double tap, the rest of the touches should pass through.</p>