title: implementing UIScrollViewDelegate in a UICollectionView subclass
body: <p>I have a <code>UICollectionView</code> subclass.</p>
  
  <p>I want to add a default implementation for <code>scrollViewDidScroll</code> from <code>UIScrollViewDelegate</code></p>
  
  <p>Is there a way to access the scrollView delegate methods from the <code>UICollectionView</code> subclass?</p>
  
  <p>Thanks </p>