DragDrop5.swift

func collectionView(_ collectionView: UICollectionView, performDropWith coordinator: UICollectionViewDropCoordinator)
{
    let destinationIndexPath: IndexPath
    if let indexPath = coordinator.destinationIndexPath
    {
        destinationIndexPath = indexPath
    }
    else
    {
        // Get last index path of collection view.
        let section = collectionView.numberOfSections - 1
        let row = collectionView.numberOfItems(inSection: section)
        destinationIndexPath = IndexPath(row: row, section: section)
    }
    
    switch coordinator.proposal.operation
    {
    case .move:
        //Add the code to reorder items
        break
        
    case .copy:
        //Add the code to copy items
        break
        
    default:
        return
    }
}