Ios 如何在AppDelegate外部使用UINavigationController？

在我当前的应用程序中，我使用UINavigationController显示其他ViewController的内容。它是这样安装在appDelegate中的

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];    
    self.viewController = [[ViewController alloc] init];
UINavigationController* navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
    [navigationController.navigationBar setBarStyle:UIBarStyleBlackOpaque];
    [self.window addSubview:navigationController.view];
    [[self window] setRootViewController:navigationController];
    [self.window makeKeyAndVisible];
    return YES;
}

我现在想要的是创建一个新的视图控制器，在启动屏幕之后显示一个简介视频。视频播放完成后，我想按下StartViewController并在其上安装UINavigationController。这意味着我会在我的另一个ViewController中进行设置，对吗

可能吗？有什么帮助吗？

---

谢谢你的时间。

你可以像我下面做的那样做

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; 
    capturedImg = [[UIImage alloc]init];
    self.splash = [[UIImageView alloc] initWithFrame:self.window.frame];
    splash.image = [UIImage imageNamed:@"default.png"];
    [self.window addSubview:splash];
    [self performSelector:@selector(Load_FirstView) withObject:nil afterDelay:2];
    [self.window makeKeyAndVisible];
}

以及Load_FirstView方法

-(void)Load_FirstView
{    
    MasterViewController *masterViewController = [[MasterViewController alloc] initWithNibName:@"MasterViewController" bundle:nil];
    self.navigationController = [[UINavigationController alloc] initWithRootViewController:masterViewController];
    [self.window makeKeyAndVisible];
}

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如果您想播放视频，只需将另一种方法放在这两种方法之间，即先调用它，然后从中调用Load_firstView方法，谢谢您的快速回复。我还发现了一篇关于闪屏的有趣博客：

-(void)Load_FirstView
{    
    MasterViewController *masterViewController = [[MasterViewController alloc] initWithNibName:@"MasterViewController" bundle:nil];
    self.navigationController = [[UINavigationController alloc] initWithRootViewController:masterViewController];
    [self.window makeKeyAndVisible];
}

对我来说，这是可行的。看起来，这是一种很好的灵活方式