变化RootViewController的到导航控制器

Question

我新的iPhone，

我想改变我的Rootviewcontroller我的新类，并使其导航控制器。

这里是我的代码片段，

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  


    UINavigationController *navigationController=[[UINavigationController alloc] initWithRootViewController:detailViewController]; 
    [self.window addSubview:navigationController.view]; 

    [self.window makeKeyAndVisible]; 


    return YES; 
} 

我得到SIGABRT说：'adding a root view controller <NewClass: 0x6a8dd50> as a child of view controller:

Answer 1

每当ü要设置：

DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil]; 
UINavigationController *navigationController=[[UINavigationController alloc] initWithRootViewController:detailViewController]; 
self.window.rootViewController =nil; 
self.window.rootViewController = navigationController; 
[self.window makeKeyAndVisible]; 

编辑：直接使用AppDelegateinstance设置rootViewController为UIWindow如我上面显示。

Answer 2

相反的：

[self.window addSubview:navigationController.view]; 

使navigationController的rootViewControllerwindow的：

self.window.rootViewController = navigationController; 

另外，是detailViewController类型UINavigationController？您不能将UINavigationController作为根设置为另一个UINavigationController对象。

Answer 3

只需添加这条线，

RootViewController *defaultViewController=[[RootViewController alloc]initWithNibName:@"NAME_OF_XIB" bundle:nil];

之前的UINavigationController的初始化，

RootViewController *defaultViewController=[[RootViewController alloc]initWithNibName:@"NAME_OF_XIB" bundle:nil]; 
UINavigationController *navigationController=[[UINavigationController alloc] initWithRootViewController:detailViewController]; 
[self.window addSubview:navigationController.view]; 

[self.window makeKeyAndVisible]; 
return YES; 

Answer 4

更改RootViewController的到NavigationController ..

UINavigationController *navigationController=[[UINavigationController alloc] initWithRootViewController:self.detailViewController];