title: How do I got Multiple Selections in UICollection View using Swift 4
body: <p>I'm new to swift and building iOS Application from the scratch (using swift 4) and want to do something like below.
  1. Implement Multiple cell selections in UICollectionView,
  2. Pass selected cells data to Server.
  Please anyone can help me, how to do that? Tell me the process and supporting articles to do that.</p>
  
  <p>Below is reference Image. Thanks in Advance.</p>
  
  <p><img src="https://i.stack.imgur.com/skRqZ.jpg" alt="Reference Image/Screen"></p>