Beginning Collection Views

Notes: 10. Cleaning up the UI

There's a bug in this project where not all cells are deselected if you leave editing mode with cells selected. The final project for this part of the course has been updated with a fix. To implement it yourself, add the following to the 'setEditing' method, just after setting allowsMultipleSelection:

    collectionView.indexPathsForSelectedItems?.forEach {
      collectionView.deselectItem(at: $0, animated: false)
    }