呈现 UIAlertController 时无法关闭 UIViewController

Question

我正在尝试关闭当前正在呈现 UIAlertController 的 UIViewController，如下所示，

class SampleViewController: UIViewController {

    private var alertController: UIAlertController?

    override func viewDidLoad() {
        super.viewDidLoad()
        presentAlert()
    }

    fucn presentAlert() {
        let alertController = UIAlertController(title: "alert", message: nil, preferredStyle: .alert)

        alertController.addAction(UIAlertAction(title: "Dismiss", style: .destructive, handler: {
            dismiss(animated: true)
        }))
        alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

        present(alertController, animated: true, completion: {
            self.alertController = alertController
        })
    }

    override func dismiss(animated flag: Bool, completion: (() -> Void)? = nil) {

        // alertController?.dismiss(animated: true)
        /*This dismisses SampleViewController when user taps Cancel
         but I want user to stay on this screen when they tap Cancel*/

        super.dismiss(animated: flag, completion: completion)
    }
}

class currentViewController: UIViewController {
    private let sampleViewController = SampleViewController()

    func presentSampleViewController() {
        present(sampleViewController, animated: true)
    }

    func dismissSampleViewController() {
        sampleViewController.dismiss(animated: true)
    }
}

但只有警报被解除，而不是整个 SampleViewController 我也找不到 override func dismiss(animated flag: Bool, completion: (() -> Void)? = nil) 是从 CurrentViewController 还是 UIAlertController 操作中调用的。

我想同时关闭 alert 和 SampleViewController，并将用户带回 CurrentViewController。任何帮助将不胜感激，提前致谢。

Answer 1

在 dismissSampleViewController() 中调用 dismiss(animated: flag, completion: completion) 而不是 sampleViewController.dismiss(animated: true)

关闭 CurrentViewController 您将关闭所有子视图控制器

呈现 UIAlertController 时无法关闭 UIViewController

Unable to dismiss UIViewController when it is presenting UIAlertController

xcode

uiviewcontroller

ios

swift