A Swift extension for UICollectionViewController to allow setting and getting a UIRefresh control in the same manor as UITableViewController.

UICollectionViewControllerExtensions

///
/// Extention functions for UICollectionViewController
///
extension UICollectionViewController {
    /// Allows easy access to a collection view controller's refrsh control the same way as in a table view controller.
    var refreshControl: UIRefreshControl? {
        get {
            return collectionView?.viewWithTag(140412014669856) as? UIRefreshControl
        }
        set {
            if let oldRefreshControl = collectionView?.viewWithTag(140412014669856) as? UIRefreshControl {
                oldRefreshControl.removeFromSuperview()
                collectionView?.alwaysBounceVertical = false
            }
            
            if let refreshControl = newValue {
                refreshControl.tag = 140412014669856
                collectionView?.addSubview(refreshControl)
                collectionView?.alwaysBounceVertical = true
            }
        }
    }
}