title: Setting minimum line spacing in collectionView
body: <p>I'm trying to set the minimum line spacing using swift in my collectionViewController, but i can't seem too find the method i need to use. I need this to be programmatically since i need to change this dynamically depending on the selectedSegmentedIndex. How can i change the minimum line spacing programmatically?</p>
  
  <p>i've tried to add the UICollectionViewFlowLayout, but cant since it's a UICollectionViewController.</p>
  
  <p>i guess i need to use something like.</p>
  
  <pre><code>collectionView:layout:minimumLineSpacingForSectionAtIndex:
  </code></pre>