title: How to trick UIScrollView into starting scrolling in the middle of panning?
body: <p>Example:</p>
  
  <p>You have a UIScrollView with scrollEnabled = NO.
  After user pans a certain distance, you want the scroll view to start scrolling.</p>
  
  <p>When finger goes down on screen and I disable scrolling, the scroll view is dead until the finger is lifted. Enabling scrolling in middle of a pan doesn't cause it to start.</p>
  
  <p>I suspect it is because UIScrollView will decide to ignore the touch sequence if it was scrollEnabled=NO during its internal touchesBegan:withEvent: (or its private pan gesture recognizer).</p>
  
  <p>How would you trick it into starting to scroll natively (with bounce effect) in the middle of a touch sequence?</p>
  
  <p>Reason: For a simple UIKit based game that requires this mechanic.</p>