Question

I have created a view based application and in the appdelegate .h file I have created UINavigationcontroller object and added it to window subview. Next in the app did finish launching I had allocated and initialised a class that I want to be viewed when the app first launches with the navigation bar on the top of it.

So this is the code I have did to add the class to navigation bar

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.

    // Add the view controller's view to the window and display.
    [window addSubview:navController.view];
    //test is the class that i want to be viewed first when  the app launches first
    test *t = [[test alloc]initWithNibName:@"test" bundle:nil];
    [navController.view addSubview:t.view];
    [window makeKeyAndVisible];

    return YES;
}

but the problem is my test class launches but it does not display the navigation bar. What may be the problem?

Answer 1

Use some like this (add these lines)

appDelegate.h

UINavigationController *navController

@property (nonatomic,retain) UINavigationController *navController;

and in .m

test *t = [[test alloc]initWithNibName:@"test" bundle:nil]; 
self.navController=[[[UINavigationController alloc] initWithRootViewController:t] autorelease];

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

it helps you.

From other view you need to make object of the appDelegate class then access the navigation controller of that class

see this

yourAppDelegateClass *objAppDelegate=(yourAppDelegateClass *)[[UIApplication sharedApplication] delegate];

now for pushing a view

SecondView *s=[[[SecondView alloc] initWithNibName:@"yournibName" bundle:nil] autorelease];
[objAppDelegate.navController pushViewController:s animated:YES];

this concept help you.