title: touches methods not getting called on UIView placed inside a UIScrollView
body: <p>I have a Custom Scroll View, subclassing <code>UIScrollView</code>. I have added a scroll view in my viewcontroller nib file and changed its class to CustomScrollView. Now, this custom scroll view (made from xib) is added as a subview on self.view.</p>
  
  <p>In this scroll view, I have 3 text fields and 1 <code>UIImageView</code>(named signImageView) added from xib. On clicking <code>UIImageView</code> (added a <code>TapGestureRecogniser</code>), a UIView named signView is added on the custom scroll view. I want to allow User to sign on this view, So I have created a class Signature.m and .h, subclassing <code>UIView</code> and implemented the touches methods (touchesBegan, touchesMoved and touchesEnded) and initialised the signView as follows:</p>
  
  <pre><code>signView = [[Signature alloc]initWithFrame:signImageView.frame];
      [customScrollView addSubview:signView];
  </code></pre>
  
  <p>But when I start signing on the signView, the view gets scrolled and hence the touches methods don't get called.</p>
  
  <p>I have tried adding signView on self.view instead of custom scroll view, but in that case the view remains glued to a fixed position when I start scrolling. (Its frame remains fixed in this case)</p>