UINavigationController and presentModalViewController

Question

I have a application combined with TabController and UINavigationController.

When a button is pressed, I want to pop up another window with its own UINavigationController.

-(void) buttonPushed: (UIBarButtonItem *) myButton
{

    MyNavigationController *controller = [[MyNavigationController alloc] initWithNibName:@"MyNavigationController" bundle:nil];

    MyDelegate *appDelegate = (MyAppDelegate*) [[UIApplication sharedApplication] delegate];    
    [appDelegate.rootController presentModalViewController:controller animated:YES];
}

The window shows, but I got an complete blank navigation bar and I don't see my modification of title in nib file.

I guess there is something wrong when I set the nib because when I replace the navigation controller with an basic view controller one, it loads OK.

So any idea what goest wrong?

Answer 1

Just a quick idea,

have you pushed a view controller onto the NavigationController before you present the NavigationController ?

Been there, done that myself ;)

Answer 2

You have to add your view to the NavController first, and then display the NavController in the modal window. Try something like this:

MyController *controller = [[MyController alloc] initWithNibName:@"controllerNib" bundle:nil];

  //Place controller in navController
UINavigationController * navController = [[UINavigationController alloc] initWithRootViewController:controller];

//Display in form sheet modal window
navController.modalPresentationStyle = UIModalPresentationFormSheet;

 MyDelegate *appDelegate = (MyAppDelegate*) [[UIApplication sharedApplication] delegate];    
[appDelegate.rootController presentModalViewController:navController animated:YES];

Once you do that, you can push a new view onto the navController anytime you want inside the controller view controller. It will automatically handle the back buttons and all that jazz. Simple as that :)