title: How to get data from a selected UICollectionView cell?
body: <p>My <code>ViewController</code> consists of a <code>UIButton</code> and a <code>UICollectionView</code> which has 4 cells. I will select any cell and when I tap the button I want to get the data from only the selected <code>UICollectionViewCell</code>.
  The <code>UIButton</code> is outside the <code>UICollectionView</code> and <code>UICollectionViewCell</code>.</p>