Asks the delegate for the targeted drag item preview to show during the drop animation.
- iOS 11.0+
The interaction that called this method.
The drag item represented by the preview.
A targeted drag preview provided by the system.
The default preview, which is the same behavior as not implementing this method.
A targeted drag item preview that you create.
The preview returned after moving to a new preview target (using the
nilto fade the preview that is currently displayed to the user.
The system calls this method multiple times, once for each visible drag item. It shows the preview during the drop animation in order to visually “drop” the drag item into place.