swift - 标签栏和导航栏的问题

选项卡栏中有两个视图控制器。我设置为如果用户已登录，则直接显示选项卡栏，否则显示loginviewcontroller。查看AppDelegate中的代码

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        UserDefaults.standard.register(defaults: ["NSApplicationCrashOnExceptions": true])

        let status = UserDefaults.standard.bool(forKey: "status")

        //StoryBoard Decide
        if (status == false){
            let storyBoard : UIStoryboard = UIStoryboard(name: "Tools", bundle:nil)
            let nextViewController = storyBoard.instantiateViewController(withIdentifier: "LoginViewController") as! LoginViewController
            let navigationController = UINavigationController(rootViewController: nextViewController)
            let appdelegate = UIApplication.shared.delegate as! AppDelegate
            appdelegate.window!.rootViewController = navigationController
        }else {
            let storyBoard : UIStoryboard = UIStoryboard(name: "Tools", bundle:nil)
            let nextViewController = storyBoard.instantiateViewController(withIdentifier: "tabbar") as! UITabBarController
            let navigationController = UINavigationController(rootViewController: nextViewController)
            let appdelegate = UIApplication.shared.delegate as! AppDelegate
            appdelegate.window!.rootViewController = navigationController
        }}

但是当我通过login-viewcontroller时工作正常，但当用户已经登录时，它会在homeviewcontroller中显示导航栏。

这是我的故事板设置。

以及如何使用tabbar管理导航。

最佳答案

因为您正在创建新的导航控制器，所以添加选项卡栏作为其根视图。
您可以这样做，而不是制作uinavigationcontroller：
替换

let nextViewController = storyBoard.instantiateViewController(withIdentifier: "tabbar") as! UITabBarController
let navigationController = UINavigationController(rootViewController: nextViewController)
let appdelegate = UIApplication.shared.delegate as! AppDelegate
appdelegate.window!.rootViewController = navigationController

使用：

let nextViewController = storyBoard.instantiateViewController(withIdentifier: "tabbar") as! UITabBarController
self.window?.rootViewController = nextViewController
self.window?.makeKeyAndVisible()

关于swift - 标签栏和导航栏的问题，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/55204439/