iphone - UINavigationController 不工作

Question

我在我的应用程序中使用了 UITabBar，但(出于我自己的原因)我不得不将其删除。现在我的 UINavigationControllers 都不起作用了。最明显的地方是当我调用时:[self.navigationController pushViewController:myViewController animated:YES];

该代码现在什么都不做，因为我没有 UINavigationController，而且我不知道如何制作一个可以工作的代码。

Answer 1

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{             
    //Initialize window components
    UINavigationController *myNavController     = [[UINavigationController alloc] init];
    [self setNavController: myNavController];
    [myNavController release];

    FirstViewController *cViewController    = [[FirstViewController alloc] init];
    [self setMyFirstView: cViewController];
    [cViewController release];

    [self.window addSubview: [self navController].view];

    [[self navController] pushViewController: myFirstView animated:YES];

    [self.window makeKeyAndVisible];
    return YES;
}

这应该可以解决问题。

顺便说一下，您应该在 delegate.h 中为此声明以下内容:

@property (nonatomic, retain) UINavigationController *navController;
@property (nonatomic, retain) IBOutlet CatchengoViewController *viewController;
@property (nonatomic, retain) UIViewController *myFirstView;