title: UIScrollView zooming with Auto Layout
body: <p>I'm trying to implement a <code>UIScrollView</code> the <a href="http://developer.apple.com/library/ios/#releasenotes/General/RN-iOSSDK-6_0/">New Way</a>, using Auto Layout. I've set up constraints from the inner view to the scroll view so that it can compute its own <code>contentSize</code> automatically, and that works like a charm— except that all hell breaks loose when I try to zoom in or out. I can't even properly describe what happens, other than to say that the inner view gets "messed up".</p>
  
  <p>You can see an example of this behavior <a href="https://github.com/mattneub/Programming-iOS-Book-Examples/tree/master/ch20p573scrollViewAutoLayout2">here</a> (not my project; you have to set the scroll view's <code>maximumZoomScale</code> and implement <code>-viewForZoomingInScrollView:</code> before zooming will work).</p>
  
  <p>Has anyone else run into this behavior? Is there currently any way to get zooming in a <code>UIScrollView</code> to work with Auto Layout without essentially re-implementing the zooming behavior yourself?</p>