Question

I have 3 tabs and main navigation controller. I implements with code:

UIViewController *monitorController   = [[[MonitorController   alloc] initWithNibName:@"MonitorController"   bundle:nil] autorelease];
UIViewController *dashboardController = [[[DashboardController alloc] initWithNibName:@"DashboardController" bundle:nil] autorelease];
UIViewController *settingsController  = [[[SettingsController  alloc] initWithNibName:@"SettingsController"  bundle:nil] autorelease];

self.tabBarController = [[[UITabBarController alloc] init] autorelease];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:monitorController, dashboardController, settingsController, nil];

self.navigationController = [[[UINavigationController alloc] initWithRootViewController:self.tabBarController] autorelease];

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];

I want to change navigation title when I select another tap, but no variant (see below) not working (there are no any title at navigation controller):

    self.title = DASHBOARD_TITLE; 

    self.navigationController.title = DASHBOARD_TITLE; 

How I can resolve this problem?

Answer 1

The UINavigationController will display the title of the UIViewController it’s currently displaying, that is why you are not able to set it directly.
You may try to change the title on your UITabBarController, but I’m not sure the navigation controller will update it’s title after it first appeared on screen.

But, Do you really need that Architecture?
Usually the UITabBarController is the root viewController and if you need UINavigationControllers they are place inside the Tab that need to have navigation capability.
It was design to be use that way.

Unlike other view controllers, a tab bar interface should never be installed as a child of another view controller.

Quoted from UITabBarController Class Reference