title: How to change color of selected UICollectionViewCell
body: <p>I am having <code>UICollectionView</code> with 10 cells. When the view loads all the cells will be loaded with transparent images.</p>
  
  <p>Now when the user chooses a specific <code>UICollectionViewCell</code>, how to change that cell color, and remaining cells will have the default background color.</p>