title: UICollectionView's cell registerClass in Swift
body: <p>Right now I'm using <code>NSClassFromString</code>, but is there a better way to get an <code>AnyClass</code>! from a class in Swift? I am trying to pass the reference to my collection view's <code>-registerClass:forCellWithReuseIdentifier:</code> method.</p>
  
  <pre><code>collectionView.registerClass(NSClassFromString("MyCoolViewCell"), forCellWithReuseIdentifier: "MyCoolViewCell")
  </code></pre>