title: How to reload a collectionview cell without reloading an image
body: <p>I have a collection view and when something changes I update the data source and reload the cell in which the change occurs.  The cell kind of blinks when it reloads.  It doesn't really affect the user scrolling and I made it almost unnoticeable with:</p>
  
  <pre><code>UIView.performWithoutAnimation{
       self.collectionView.reloadItemsAtIndexPaths([NSIndexPath(forItem: index, inSection: 0)])
  }
  </code></pre>
  
  <p>This was the best I could do to make the reload less noticeable.  I have a background image taking up the entire cell.  I think the flash that I'm seeing is this image reloading, yet I don't need it to reload because the image will never change.  Does anyone know how to make the cell reload but not the image?  I can put a variable in there and change it such as (initalLoad = false) but I don't know how to keep the image from reloading.</p>