将 viewController 解除到 rootViewController 的问题

Question

我试图在注销时将 viewController 关闭到 rootViewController。但问题是 viewController 没有被解雇，它仍然保留在同一页面本身。下面我提到了我使用过的代码。

    let AppDel = UIApplication.shared.delegate as! AppDelegate
    let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let login = mainStoryboard.instantiateViewController(withIdentifier: "login")
    let nav = UINavigationController(rootViewController: login)
    AppDel.window!.rootViewController = nav
    AppDel.window?.rootViewController?.dismiss(animated: true, completion: nil)
    (AppDel.window?.rootViewController as? UINavigationController)?.popToRootViewController(animated: true)
    login.navigationController?.setNavigationBarHidden(true, animated: false)

提前致谢。

Answer 1

为什么在调用 popToRootViewController 之前关闭导航控制器？

AppDel.window?.rootViewController?.dismiss(animated: true, completion: nil)

检查您是否从主线程调用它。在此块中添加您的代码：
```
DispatchQueue.main.async {
    // TODO: Your code
}
```

Answer 2

在 App delegate 中键入一个接受新视图控制器并将其设置为根的函数。而不是解雇旧的。

func updateRootViewController(with viewController: UIViewController) {
        guard let oldViewController = self.window?.rootViewController else { return }
        UIView.transition(from: oldViewController.view, to: viewController.view, duration: 0.3, options: [.transitionCrossDissolve, .allowAnimatedContent]) { _ in
            self.window!.rootViewController = viewController
            self.window!.makeKeyAndVisible()
            oldViewController.dismiss(animated: false) {
                oldViewController.view.removeFromSuperview()
            }
        }
    }

Answer 3

早些时候，我遇到过同样的问题。我在成功关闭控制器后通过执行所有其他操作解决了问题。

请参考下面的示例代码。我相信它对你有用。

    AppDel.window?.rootViewController?.dismiss(animated: true, completion: {
        (AppDel.window?.rootViewController as? UINavigationController)?.popToRootViewController(animated: true)
        login.navigationController?.setNavigationBarHidden(true, animated: false)    
    })

将 viewController 解除到 rootViewController 的问题

Issue on dismissing a viewController to rootViewController

ios

swift

rootviewcontroller

dismissviewcontroller