title: Limiting the scrollable area in UIScrollView
body: <p>I have a UIScrollView that is scrolling a fairly large UIView. </p>
  
  <p>At certain times I want to limit the area the user can scroll around in. For example, I may only want to allow them to view the bottom quarter of the view.</p>
  
  <p>I am able to limit the area by overriding scrollViewDidScroll and then calling setContentOffset if the view has scrolled too far. But this way I can't get it bounce back as smoothly as the UIScrollView can naturally do when scrolling beyond the bounds of the UIView.</p>
  
  <p>Is there a better way to limit the scrollable area in a UIScrollView?</p>