title: UICollectionView with custom layout - unable to add supplementary view in storyboard
body: <p>From the <a href="http://developer.apple.com/library/ios/#documentation/WindowsViews/Conceptual/CollectionViewPGforIOS/CreatingCellsandViews/CreatingCellsandViews.html" rel="noreferrer">Collection View Programming Guide for IOS</a>:</p>
  <hr />
  <h2>Registering Your Cells and Supplementary Views</h2>
  <p>You can configure the cells and views of your collection view programmatically or in your app’s storyboard file.</p>
  <ul>
  <li><p><strong>To configure cells and views in your storyboard:</strong></p>
  <p>When configuring cells and supplementary views in a storyboard, you do so by dragging the item onto your collection view and configuring it there. This creates a relationship between the collection view and the corresponding cell or view.</p>
  <ul>
  <li>For cells, drag a Collection View Cell from the object library and drop it on to your collection view. Set the custom class and the collection reusable view identifier of your cell to appropriate values.</li>
  <li>For supplementary views, drag a Collection Reusable View from the object library and drop it on to your collection view. Set the custom class and the collection reusable view identifier of your view to appropriate values.</li>
  </ul>
  </li>
  </ul>
  <hr />
  <p>There is no way that I manage to drop a Collection Reusable View unto a collection view in my storyboard as long as layout is set to Custom instead of Flow. If I drop one when layout is set to flow, it's gone as soon as I set Layout back to custom.</p>
  <p>If I drop it outside of the collection view, as a top level object, it's not used at runtime, even though both the class and identifier is set right. Instead I get an error telling me that I have to register the supplementary view. If I register it manually, it want use my visual design from the storyboard.</p>
  <p>Any suggestions on how this is ment to work?</p>