title: How do I use UILongPressGestureRecognizer with a UICollectionViewCell in Swift?
body: <p>I would like to figure out how to println the indexPath of a UICollectionViewCell when I long press on a cell.</p>
  
  <p>How can I do that in Swift?</p>
  
  <p>I have looked all over for an example of how to do this; can't find one in Swift.</p>