title: How to expand collectionview cell to full screen
body: <p>I'm trying to print the image on fullscreen
  I used UICollectionViewDelegateFlowLayout
  here my code is</p>
  <pre><code>func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -&gt; CGSize {
          let itemWidth = collectionView.bounds.width
          let itemHeight = collectionView.bounds.height
          return CGSize(width: itemWidth, height: itemHeight)
      }
  </code></pre>
  <p>but it doesn't show the content on full screen it makes space from top and bottom</p>