以编程方式在 Appdelegate 的 Storyboard 中为 UINavigationcontroller 设置 rootViewcontroller

我有一个价值NSUserdefaults。我在用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
        }
}

我可以使用打开该应用程序URL also

- (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;
}

我怎样才能设置rootViewController为了UINavigationController基于检索到的值。有人可以帮我吗？

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;