title: How do I make an UIScrollView to ignore single touches?
body: <p>I have an <code>UIScrollView</code> inside another <code>UIScrollView</code>. The outer scroll view handles paging, the inner scroll view handles zooming (it’s an image gallery with zooming support). I need the inner scroll view to ignore single touches so that they go to the outer scroll view instead.</p>
  
  <p>This can be done using <code>[innerScrollView setUserInteractionEnabled:NO]</code>, but that obviously also turns off the pinch and panning gestures on the inner scroll view. Is there a way to keep the pinch and pan gestures handled by the inner zoom view and forward all other events up the responder chain?</p>
  
  <p>PS. I can always come with some delegation hack to solve the issue. I’d like to know if there’s a simple way to get it working using the regular responder chain.</p>