ios - 如何从 didSelectRowAt 执行 segue

Question

我被这个从选定单元格执行 segue 的简单任务困住了。

我创建了一个从一个 ViewController 到另一个具有标识符“showDetails”的 segue。比我尝试这段代码:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    performSegue(withIdentifier: "showDetails", sender: self)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "showDetails",
    let destination = segue.destination as? DetailsViewController {
        let indexPath = tableView.indexPathForSelectedRow!
        destination.rideIndex = indexPath.row
    }
}

显然它不起作用。我做错了什么？

Answer 1

检查 UITableView 委托(delegate)并确保将 segue 设置为“Present Modally or show”并且:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "showDetails" {
        let destination = segue.destination as! DetailsViewController 
        let indexPath = tableView.indexPathForSelectedRow!
        destination.rideIndex = indexPath.row
    }
}

但我个人更喜欢下面的代码来打开 UIViewController:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let mainStoryboard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let destination = mainStoryboard.instantiateViewController(withIdentifier: "DetailsViewController") as! DetailsViewController
        let indexPath = tableView.indexPathForSelectedRow!
        destination.rideIndex = indexPath.row
        self.present(destination, animated: true, completion: nil)
}

并确保您的 DetailsViewController 具有标识符“DetailsViewController”