title: Get number of column in a CollectionView IOS
body: <p>I use an <code>UICollectionView</code> in my first app. My problem is I can't get the number of column (or line) calculated in the <code>UICollectionView</code>. </p>
  
  <p>The <code>UICollectionView</code> is inside an <code>UIScrollView</code>, and I want to set the height of the <code>UICollectionView</code> because I don't want to scroll in the <code>UICollectionView</code> but I want to see all the items.</p>
  
  <p>Is this possible?</p>
  
  <p>Thanks,
  F.G</p>