Question

我希望你能帮助我。我不知道我做错了什么，我已经为代码完成了很多圈。我尝试的是，当用户通过身份验证时，它会被重定向到tabcontroller，但视图不会加载（黑屏加载）。奇怪的是它加载了黑色加载视图中的顶层菜单。故事板的附加图像和假定的加载视图。非常感谢你

func application(_ application: UIApplication, 
  didFinishLaunchingWithOptions launchOptions: 
  [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

  UIApplication.shared.statusBarStyle = .lightContent  

  let storyBoard: UIStoryboard = UIStoryboard(name:"Main", bundle: Bundle.main)

  if Session.isLoggedIn {
    print("User already logged In")
    let tabBarController = storyBoard.instantiateViewController(withIdentifier: "TabBarBuyerController")
    self.window?.makeKeyAndVisible()
    self.window?.rootViewController = tabBarController
  } else {
    print("New User")
    let loginViewController = storyBoard.instantiateViewController(withIdentifier: "LoginViewController")
    self.window?.makeKeyAndVisible()
    self.window?.rootViewController = loginViewController
}

    return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions) }

Main StoryBooard picture

Loaded view

Answer 1

问题是你没有在TabBarViewController中设置viewController。使用Below方法在AppDelegate

中显示TabBarViewController

 func showHeadlineTabBarViewController() {

    let storyboard = UIStoryboard(name: "Main", bundle: nil)

    let FirstViewController: UIViewController? = storyboard.instantiateViewController(withIdentifier: String(describing: FirstViewController.self))
    let FirstViewControllerNC = UINavigationController(rootViewController: FirstViewController!) 

    let secondViewController: UIViewController? = storyboard.instantiateViewController(withIdentifier: String(describing: SecondViewController.self))
    let secondViewControllerNC = UINavigationController(rootViewController: secondViewController!) 

    let tabBarController = storyBoard.instantiateViewController(withIdentifier: "TabBarBuyerController")
    tabBarController.viewControllers = [FirstViewControllerNC, secondViewControllerNC]

    window?.rootViewController = tabBarController
    window?.makeKeyAndVisible()
}

uiTabBarController视图中的黑屏

1 个答案: