iphone - 动态更改导航 Controller 的 rootviewcontroller

Question

我正在尝试在 didFinishLaunchingWithOptions 中为 NavigationController 更改 RootViewController。
但我不知道我该怎么做。

我也浏览过这个链接:
http://starterstep.wordpress.com/2009/03/05/changing-a-uinavigationcontroller%E2%80%99s-root-view-controller/

这是我在 didFinishLaunchingWithOptions 中的代码:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    UIViewController *rootController=[[HomePageController alloc] initWithNibName:@"HomePageController" bundle:nil];
    navigationController=[[UINavigationController alloc] initWithRootViewController:rootController];

//    presentation=[[PresentationController alloc]initWithNibName:@"PresentationController" bundle:nil];
//    
//    navigationController=[[UINavigationController alloc]initWithRootViewController:presentation];
//    
//    presentationList=[[PresentationListController alloc]initWithNibName:@"PresentationListController" bundle:nil];
//    
//    UINavigationController *listnavigation = [[UINavigationController alloc] initWithRootViewController:presentationList];
//    
//    revealer=[[ZUUIRevealController alloc]initWithFrontViewController:navigationController rearViewController:listnavigation];

    [self.window addSubview:navigationController.view];

    [self.window makeKeyAndVisible];
    return YES;
}

现在我评论然后运行应用程序来更改 rootviewcontroller。然而，这不是实际的方法。

我们将不胜感激。

Answer 1

取而代之的是:

[self.window addSubview:navigationController.view];

把这个:

self.window.rootViewController = navigationController;