Custom drag preview for UIView

func dragInteraction(_ interaction:UIDragInteraction, previewForLifting item:UIDragItem, session:UIDragSession) -> UITargetedDragPreview? {
  let imageView = UIImageView(image: UIImage(named: "MyDragImage"))
  let dragView = interaction.view!
  let dragPoint = session.location(in: dragView)
  let target = UIDragPreviewTarget(container: dragView, center: dragPoint)
  return UITargetedDragPreview(view: imageView, parameters:UIDragPreviewParameters())
}