title: iOS: Can I override pinch in/out behavior of UIScrollView?
body: <p>I'm drawing a graph on a <code>UIView</code>, which is contained by a <code>UIScrollView</code> so that the user can scroll horizontally to look around the entire graph.</p>
  
  <p>Now I want to zoom the graph when a user pinches in with two fingers, but instead of zooming in a view with the same rate for X and Y direction, I want to zoom only in the X direction by changing the X scale, without changing the Y scale.</p>
  
  <p>I think I have to catch the pinch in/out gesture and redraw the graph, overriding the default zooming behavior.</p>
  
  <p>But is there a way to do this?</p>
  
  <p>I've been having a very difficult time to catch the pinch gesture on the <code>UIScrollView</code>, as it  cancels the touches when it starts to scroll. I want the zooming to work even after the <code>UIScrollView</code> cancels the touches. :(</p>
  
  <p>Thanks,
  Kura</p>