title: Prevent UIScrollView to scroll unless it was touched near edges
body: <p>I have the following situation: A UIScrollView contains a UIWebView. I want the content inside the web view to be touchable, but the scroll view should not scroll unless it was touched near the left or right edge. I have subclassed both UIScrollView and UIWebView to try to override methods like <code>hitTest</code> and <code>pointInside</code> but no go so far.</p>
  
  <p>The only partial success I've had was to override <code>pointInside</code> in my UIScrollView and return NO if the point was not near the edges. Then the UIScrollView stops scrolling, but no touches are sent to the UIWebView.</p>