Reset scroll on UICollectionView

Question

I have a horizontal UICollectionView which works fine and scrolls. When I tap an item I update my data and call reloadData. This works and the new data

Answer 1

To deal with an UINavigationController and a transparent navigation bar, I had to calculate the extra top offset to perfectly match the position of the first element.

Swift 1.1 code:

     let topOffest = CGPointMake(0, -(self.collectionView?.contentInset.top ?? O))
     self.collectionView?.setContentOffset(topOffest, animated: true)

Cheers!