在Appdelegate的Storyboard中以编程方式为UINavigationcontroller设置rootViewcontroller [英] Programmatically set rootViewcontroller for UINavigationcontroller in Storyboard in Appdelegate

问题描述

我在NSUserdefaults中有一个值.我正在使用storyboard，它嵌入在UINavigationController中.

I have a value in NSUserdefaults. I am using storyboard, it is embedded in UINavigationController.

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

我也可以使用URL打开应用

- (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为UINavigationController设置rootViewController.有人可以帮帮我吗?

How can I set the rootViewController for the UINavigationController based on the value that is retrieved .Can anyone please help me out?

推荐答案

您可以按照if/else条件使用ViewController创建UINavigationController的对象，并将导航控制器设置为AppDelegate中window的rootViewController属性，如下所示:

You can create an object of UINavigationController with your ViewController as per if/else condition and set the navigation controller as rootViewController property of window in AppDelegate as follows:

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

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