context_menu_tableView_delegate_submenu.swift

func tableView(_ tableView: UITableView, contextMenuConfigurationForRowAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
    let task = tasks[indexPath.row]
    return UIContextMenuConfiguration(identifier: task.id as NSString, previewProvider: nil) { _ in
        let blueAction = UIAction(title: "Blue") { _ in }
        let redAction = UIAction(title: "Red") { _ in }
        let greenAction = UIAction(title: "Green") { _ in }
        let purpleAction = UIAction(title: "Purple") { _ in }
        let tagActions = UIMenu(title: "Change Tag Color...", children: [blueAction, redAction, greenAction, purpleAction])
        let shareAction = UIAction(
          title: "Share",
          image: UIImage(systemName: "square.and.arrow.up")) { _ in
            // share the task
        }
        let copyAction = UIAction(
          title: "Copy",
          image: UIImage(systemName: "doc.on.doc")) { _ in
            // copy the task content
        }
        let deleteAction = UIAction(
          title: "Delete",
          image: UIImage(systemName: "trash"),
          attributes: .destructive) { _ in
            // delete the task
        }
        return UIMenu(title: "", children: [tagActions, shareAction, copyAction, deleteAction])
    }
}