如何在swift中编写if/else语句，以便当单击iOS表视图中的特定单元格时，它会转到特定的viewController

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if indexPath.row == 0 {
        let viewController = FirstViewController()
        navigationController?.pushViewController(viewController, animated: true)
    } else if indexPath.row == 1 {
        let viewController = SecondViewController()
        navigationController?.pushViewController(viewController, animated: true)
    } else if indexPath.row == 2 {
        let viewController = ThirdViewController()
        navigationController?.pushViewController(viewController, animated: true)
    } else {
        let viewController = DefaultViewController()
        navigationController?.pushViewController(viewController, animated: true)
    }
}