Проведите пальцем по popViewController не работает в iOS 13

Question

Ниже кода я сделал для пролистывания до popViewController. и это работает для ios 12 или более старой версии, но когда он работает в iOS 13, он не работает. текущая версия Xcode - 11.1

Также я использую встроенный NavigationController и панель навигации. Так что я не думаю, что это проблема из-за контроллера навигации.

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
    }
}

Answer 1

Я наконец исправил эту проблему после большого количества попыток поймать. Проблема заключается в вызове метода deinit и отсутствии установки правильного делегата в методе viewDidLoad.

Ниже приведен рабочий код.

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
    }
}

Answer 2

Вы можете попробовать проверить контроллер pop view, используя следующее условие, которое проверяет iOS 13:

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

                }

Вы должны посмотреть на изменения UINavigationController, появившиеся в iOS 13:

https://medium.com/@hacknicity/view-controller-presentation-changes-in-ios-13-ac8c901ebc4e