collectionview-contextmenu-preview-click.swift

func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
        
        let id = configuration.identifier as! String
        
        animator.addCompletion {
            self.show(SecondViewController(index: Int(id)), sender: self)
        }
}