Pull-to-refresh in UICollectionViewController

Question

I want to implement pull-down-to-refresh in a UICollectionViewController under iOS 6. This was easy to achieve with a UITableViewController, like so:

Answer 1

The refreshControl property has now been added to UIScrollView as of iOS 10 so you can set the refresh control directly on collection views.

https://developer.apple.com/reference/uikit/uiscrollview/2127691-refreshcontrol

UIRefreshControl *refreshControl = [UIRefreshControl new];
[refreshControl addTarget:self action:@selector(refreshControlAction:) forControlEvents:UIControlEventValueChanged];
self.collectionView.refreshControl = refreshControl;