Question

我是iPhone新手，

我想将Rootviewcontroller更改为我的新班级，并将其设为导航控制器。

这是我的代码段，

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


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

    [self.window makeKeyAndVisible];


    return YES;
}

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

Answer 1

每当你想设置：

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：如上所示，直接使用AppDelegate instance为rootViewController设置UIWindow。

Answer 2

而不是：

[self.window addSubview:navigationController.view];

使navigationController成为rootViewController window：

 self.window.rootViewController = navigationController;

此外，detailViewController类型为UINavigationController吗？您无法将UINavigationController设置为另一个UINavigationController对象的根目录。

Answer 3

只需添加此行

即可

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

在UINavigationController初始化之前

，

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

将RootViewController更改为NavigationController ..

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

将RootviewController更改为导航控制器

4 个答案: