test

tableview.swift

    func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        let task: Task = tasks[indexPath.row]

        let action: UIContextualAction = UIContextualAction(style: .destructive, title: "Finish", handler: {
            (action, view, completionHandler) in
            self.tasks.remove(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with: .fade)
            completionHandler(true)
        })

        action.backgroundColor = .red
        let config = UISwipeActionsConfiguration(actions: [action])
        return config
    }