title: UICollectionView - Scrolling to first cell
body: <p>I'm making use of UICollectionView and I need to scroll to first cell after click in a button.</p>
  
  <p>The button is located in a (big) header section in my collection view... when clicking int it, I need scroll to my first cell located bellow of this button.</p>
  
  <p>I created a action of this button, but I don't know how to scroll to first UICollectionViewCell.</p>
  
  <p>Can someone help me? </p>