title: Simulate end of drag in UIScrollView
body: <p>When a user scrolls a certain distance horizontally beyond the contentSize of my scrollView I want to 'take over' and run some animations.  The problem is that even if I turn off user interaction as soon as this happens, the 'drag' operation is still ongoing.  Only when the user releases his touch is interaction disabled.</p>
  
  <p>Is there a way to programmatically simulate the touch up at the end of the drag? The end result should be that when my trigger fires, the user is immediately unable to manipulate the view any more.</p>