A walkthrough on how to implement reordering with UICollectionView.
http://nshint.io/blog/2015/07/16/uicollectionviews-now-have-easy-reordering/
A walkthrough on how to implement reordering with UICollectionView.
http://nshint.io/blog/2015/07/16/uicollectionviews-now-have-easy-reordering/