回到swift中的root视图控制器

Question

有没有办法解雇所有视图控制器（其中一些控制器通过导航推送）并返回到根视图控制器。我看到很多例子，但它们在我的应用程序中不起作用。我正在使用swift 4

这是appdelegate中的代码

func setNavigationToRootViews(){

    storyBoard = UIStoryboard(name: "Main", bundle: nil)
    nav = storyBoard?.instantiateViewController(withIdentifier: "mainNavigation") as! UINavigationController?
    let accessToken: String? = KeychainWrapper.standard.string(forKey: "token")
    print(accessToken as Any)

   if accessToken != nil {

        let homeVc = storyBoard?.instantiateViewController(withIdentifier: "Home-VC") as! HomeViewController
        nav?.pushViewController(homeVc, animated: false)
    }else{

        let welcomVc = storyBoard?.instantiateViewController(withIdentifier: "login-VC") as! LoginViewController
        nav?.pushViewController(welcomVc, animated: false)
    }

    let leftMenuVC = storyBoard?.instantiateViewController(withIdentifier: "menu-VC") as! MenuViewController
    container = MFSideMenuContainerViewController.container(withCenter: nav, leftMenuViewController: leftMenuVC, rightMenuViewController: nil)
    container?.panMode = MFSideMenuPanModeNone
    window?.rootViewController = container
    window?.makeKeyAndVisible()

}

这在我上一个View控制器中

@IBAction func okayBtnTapped(_ sender: Any) {


        _ = self.navigationController?.popToRootViewController(animated: 
          true)
        dismiss(animated: true, completion: nil)

    }

Answer 1

您可以像这样设置一个新的RootController：

let storyboard = UIStoryboard(name: "sName", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier: "<YOUR ROOT CONTROLLER>")
self.window?.rootViewController = viewController

如果你在self.window没有窗口，你需要根据你的AppDelegate实例化一个窗口。

如果你在NavigationController内，你也可以使用@Anshul Bhatheja的答案

Answer 2

试试这个：

self.navigationController?.popToRootViewController(animated: true)

Answer 3

检查导航控制器，并查看该导航控制器内的控制器。看来调试问题。

这个方法popToRootViewController（动画:)是该方法应该工作

Answer 4

如果您正在使用简单的推送导航控制器，并且想要返回到根视图控制器，那么您只需编写

_ = self.navigationController?.popToRootViewController(animated: true)