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警告:试图在SampleViewController上显示UINavigationController:其视图不在窗口层次结构中

urbanairship.com xcode4

0

user2767343 · 技术社区 · 11 年前

我已经在这个论坛上尝试了所有的解决方案,但仍然无法解决。有人能帮我解决这些问题吗?我希望应用程序在NSUserDefault从Urban Airship读取密钥@“url”时打开包含tableView的inboxData类。。

这是来自SampleViewController类;

-(void)viewDidAppear:(BOOL)animated{

    [super viewDidAppear:animated];

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSString *action_9 = [defaults objectForKey:@"url"];

    if ([[[NSUserDefaults standardUserDefaults]objectForKey:@"url"] isEqualToString:@"aa9"])

{

        inboxData *screen=[[inboxData alloc]initWithNibName:@"inboxData" bundle:nil];
        screen.strGetTableSelect=@"1";
        UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:screen];
        [self presentModalViewController:navigationController animated:YES];

    }
}

返回时出现以下错误。。

警告:试图在视图不在窗口层次结构中的SampleViewController上显示UINavigationController

1 回复 | 直到 11 年前

1

karthika 11 年前

您的SampleViewController不在Window层次结构中,您需要在窗口中进行设置。

在你的appDelegate中,这样做,

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.viewController = [[SampleViewController alloc] initWithNibName:@"SampleViewController" bundle:nil];
    self.navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
    self.window.rootViewController = self.navigationController;
    [self.window makeKeyAndVisible];
    return YES;
}

如果你正在使用故事板,在didFinishLaunchingWithOptions方法中这样使用,

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
Â Â Â Â UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone"
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â bundle: nil];
Â 
Â Â Â Â SampleViewController *mainViewController = (SampleViewController*)[mainStoryboard
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â instantiateViewControllerWithIdentifier: @"SampleViewController"];
Â 
Â Â Â Â UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:mainViewController];
Â 
Â Â Â Â self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
Â Â Â Â [self.window setRootViewController:navigationController];
Â Â Â Â [self.window setBackgroundColor:[UIColor whiteColor]];
Â Â Â Â [self.window makeKeyAndVisible];
Â 
Â Â Â Â return YES;
}

在您的视图控制器中,

-(void)viewDidAppear:(BOOL)animated{

    [super viewDidAppear:animated];

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSString *action_9 = [defaults objectForKey:@"url"];

    if ([[[NSUserDefaults standardUserDefaults]objectForKey:@"url"] isEqualToString:@"aa9"])

{
        inboxData *screen=[[inboxData alloc]initWithNibName:@"inboxData" bundle:nil];
        screen.strGetTableSelect=@"1";
        [self presentModalViewController:screen animated:YES];

    }
}