UICollectionView drag and drop in iOS11
This code covers the latest drag and drop feature in iOS 11. Code sample includes dragging and dropping the images form UICollectionView to / from other applications that can accept images (like Photos app..)
Code implements following delegates.
dragDelegate - This delegate manages the dragging of items from collection view.
dropDelegate - This delegate manages the dropping of items to collection view
Detailed explanation of the code is available at https://machinethinks.com/drag-and-drop-in-uicollectionview-in-ios-11/