title: UICollectionView - Drag Cells outside the UICollectionView to specific UIViews
body: <p>I have a <code>UICollectionView</code> with alot of <code>UICollectionViewCell</code>s inside it. </p>
  
  <p>Searched alot, but couldn't find anything near this issue.</p>
  
  <p>My goal is to drag one of the Pink squares (<code>UICollectionViewCell</code>) to the Gray view (<code>UIView</code>).
  You can think of it like dragging a folder on your desktop to your trash can except that I dont want the Pink square to be deleted. Or dragging a icon from your dock (it snaps back).</p>
  
  <p>When the pink area hits the gray area it should just go back to its original position and the same when dropping out anywhere else using some kind of easy statement.</p>
  
  <p>Can anyone help me out or redirect me to some references or samples?
  Much appreciated, if you would like more info. Let me know.</p>
  
  <p><img src="https://i.stack.imgur.com/oU0T7.png" alt="enter image description here"> </p>