setNeedsDropPreviewUpdate()
Notifies the operating system that an updated drop preview is available for the item.
Declaration
func setNeedsDropPreviewUpdate()Discussion
Call this method to provide an updated drop preview after UIKit has started the drop animation. If the drop animation is still ongoing, UIKit calls the drop interaction delegate’s dropInteraction(_:previewForDropping:withDefault:) method, passing the previous drop preview as the defaultPreview.