title: IOS UICollectionView and UIScrollView recycling issue
body: <p>I am having an "recycling like" issue on the iOs project I am working on. (I am saying a recycling like issue because it makes me think about recycling issue I had on Android projects).</p>
  
  <p>I have a UICollectionView, with UICollectionViewCell. Each UICollectionViewCell contains a UIScrollView and a UIImageView inside it, in order to be able to zoom / pan the UIImageView.</p>
  
  <p>The issue I am having is that when I zoom a UIImageView (let's call this UIImageView Bob) and then scroll the UICollectionView in a way that Bob is not visible on the screen, and then scroll back the UICollectionView so Bob is visible, sometimes the zoom is applied to another UICollectionCellView of the UICollectionView and Bob is not zoomed anymore, and sometimes Bob is correctly zoomed.</p>
  
  <p>Any idea on what the issue could be ?</p>
  
  <p>Thanks</p>