title: How do I make a UICollectionView fill it's superview with autosizing?
body: <p>I have a UICollectionView with a dynamic size (variable amounts of data get added after it is added to the view) within a container view and I can't figure out how to get it to fill it's superview using autoresizing.</p>
  
  <p>I have tried every combination of autoresizing masks (via xib and code for sanity) and nothing has worked.  I have also verified that it's superview has autosize subviews.</p>
  
  <p>Edit: It's not sizing to it's content either, the current behavior is that it is just staying at the size specified in the xib.  </p>