在Appdelegate的Storyboard中以编程方式为UINavigationcontroller设置rootViewcontroller

Question

我有价值NSUserdefaults.我正在使用storyboard,它嵌入在UINavigationController.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
     if([[NSUserDefaults standardUserDefaults]objectForKey:@"isLoggedIn"]){
         //show home page here
        }else{
           // show login view
        }
}

我可以使用打开应用程序URL还

- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
         NSString *text = [[url host] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

         if(text.length > 0){
           // show home page 

         }else {
          // show settings page
        }

        return YES;
}

如何根据检索到的值设置rootViewControllerfor UINavigationController.任何人都可以帮帮我吗？

Answer 1

您可以根据if/else条件使用ViewController创建UINavigationController对象,并将导航控制器设置为AppDelegate中窗口的rootViewController属性,如下所示:

LoginViewController *loginController = [[UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil] instantiateViewControllerWithIdentifier:@"loginController"]; //or the homeController
UINavigationController *navController = [[UINavigationController alloc]initWithRootViewController:loginController];
self.window.rootViewController = navController;