Background Decoration Views

One of the things you'd get for free with UITableView in the grouped style is a nice rounded rect background around your sections. With UICollectionView, you can implement these with background decoration views. We'll see how to set these up in our compositional layout to give the series section a different feel.

This is a companion discussion topic for the original entry at https://nsscreencast.com/episodes/457-modern-collectionviews-08-background-decoration-views