滑动到在iOS 13中不工作的popViewController

下面的代码，我已经完成了对popViewController的滑动。这对ios 12或更早的版本有效，但在ios 13中运行时不起作用。Xcode的当前版本是11.1

此外，我正在使用本机NavigationController和导航栏。所以我不认为这是一个问题，因为导航控制器

import UIKit

class SwipeNavigationController: UINavigationController {

    // MARK: - Lifecycle

    override init(rootViewController: UIViewController) {
        super.init(rootViewController: rootViewController)
    }

    override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)

        self.setup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        self.setup()
    }

    private func setup() {
        delegate = self
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        // This needs to be in here, not in init
        interactivePopGestureRecognizer?.delegate = self
    }

    deinit {
        delegate = nil
        interactivePopGestureRecognizer?.delegate = nil
    }

    // MARK: - Overrides

    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
        duringPushAnimation = true

        super.pushViewController(viewController, animated: animated)
    }

    // MARK: - Private Properties

    fileprivate var duringPushAnimation = false
}

// MARK: - UINavigationControllerDelegate

extension SwipeNavigationController: UINavigationControllerDelegate {

    func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
        guard let swipeNavigationController = navigationController as? SwipeNavigationController else { return }

        swipeNavigationController.duringPushAnimation = false
    }

}

// MARK: - UIGestureRecognizerDelegate

extension SwipeNavigationController: UIGestureRecognizerDelegate {

    func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
        guard gestureRecognizer == interactivePopGestureRecognizer else {
            return true // default value
        }
        // Disable pop gesture in two situations:
        // 1) when the pop animation is in progress
        // 2) when user swipes quickly a couple of times and animations don't have time to be performed
      if (self.visibleViewController?.isKind(of: CheckOTPViewController.self))! {
        return false
      }
      if (self.visibleViewController?.isKind(of: ForgotPasswordViewController.self))! {
        return false
      }

        return viewControllers.count > 1 && duringPushAnimation == false
    }
}

---

您可以尝试使用以下检查iOS 13的条件来检查pop视图控制器：

 if #available(iOS 13.0, *) {
                   self.navigationController?.popToViewController(vc as! YourVC, animated: true)
                } else {
                    // Fallback on earlier versions

                }

您必须查看iOS 13附带的UINavigationController更改：

---

经过多次尝试，我终于解决了这个问题。 问题是调用deinit方法，而没有在viewDidLoad方法上设置正确的委托

下面是工作代码

import UIKit

class SwipeNavigationController: UINavigationController {

    // MARK: - Lifecycle

    override init(rootViewController: UIViewController) {
        super.init(rootViewController: rootViewController)
    }

    override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)

        self.setup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        self.setup()
    }

    private func setup() {
        delegate = self
        interactivePopGestureRecognizer?.delegate = self
        navigationItem.backBarButtonItem?.isEnabled = true
        interactivePopGestureRecognizer?.isEnabled = true
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        // This needs to be in here, not in init
        setup()
    }

    // MARK: - Overrides

    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
        duringPushAnimation = true

        super.pushViewController(viewController, animated: animated)
    }

    // MARK: - Private Properties

    fileprivate var duringPushAnimation = false
}

// MARK: - UINavigationControllerDelegate

extension SwipeNavigationController: UINavigationControllerDelegate {

    func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
        guard let swipeNavigationController = navigationController as? SwipeNavigationController else { return }

        swipeNavigationController.duringPushAnimation = false
    }

}

// MARK: - UIGestureRecognizerDelegate

extension SwipeNavigationController: UIGestureRecognizerDelegate {

    func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
        guard gestureRecognizer == interactivePopGestureRecognizer else {
            return true // default value
        }
        // Disable pop gesture in two situations:
        // 1) when the pop animation is in progress
        // 2) when user swipes quickly a couple of times and animations don't have time to be performed
      if (self.visibleViewController?.isKind(of: CheckOTPViewController.self))! {
        return false
      }
      if (self.visibleViewController?.isKind(of: ForgotPasswordViewController.self))! {
        return false
      }

        return viewControllers.count > 1 && duringPushAnimation == false
    }
}

---

试试这个男人：请阅读——总结是，这不是一个理想的方式来解决志愿者，可能是反作用获得答案。请不要将此添加到您的问题中。谢谢，它很有效。但是您可以将deinit保留在适当的位置，它不会影响逻辑。