Add a navigation bar in the app delegates - iphone

Question

I have a problem in my appdelegate. I want to add a navigation bar, but it doesn't work.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.tabBarController = [[UITabBarController alloc] init];
UniversViewController *universViewController = [[UniversViewController alloc] initWithNibName:#"ProduitsListinTableViewController" bundle:nil];
universViewController.title = #"univers";
CategoriesViewController *categoriesViewController = [[CategoriesViewController alloc] initWithNibName:#"ProduitsListinTableViewController" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:categoriesViewController];
navigationController.title = #"categories";
[navigationController setNavigationBarHidden:NO];
ProduitsListinTableViewController *produitListe = [[ProduitsListinTableViewController alloc] initWithNibName:#"ProduitsListinTableViewController" bundle:nil];
produitListe.title = #"troisième";
_tabBarController.viewControllers = [NSArray arrayWithObjects:universViewController, categoriesViewController, produitListe, nil];
[self.window setRootViewController:_tabBarController];
[self.window makeKeyAndVisible];
return YES;
}
Do I have to add something in UniversViewController, CategoriesViewController and ProduitsListinTableViewController or this is directly in the appdelegate?

Answer 1

Try this code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
UIViewController *viewController1, *viewController2,*viewController3,*viewController4,*viewController5;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
{
viewController1 = [[[HomeViewController alloc] initWithNibName:#"HomeViewController" bundle:nil] autorelease];
navController=[[UINavigationController alloc] initWithRootViewController:viewController1];
viewController2 = [[[SearchViewController alloc] initWithNibName:#"SearchViewController" bundle:nil] autorelease];
navController2=[[UINavigationController alloc] initWithRootViewController:viewController2];
viewController3 = [[[LocationsViewController alloc] initWithNibName:#"LocationsViewController" bundle:nil] autorelease];
navController3=[[UINavigationController alloc] initWithRootViewController:viewController3];
viewController4 = [[[CallViewController alloc] initWithNibName:#"CallViewController" bundle:nil] autorelease];
navController4=[[UINavigationController alloc] initWithRootViewController:viewController4];
viewController5 = [[[MyBookingsViewController alloc] initWithNibName:#"MyBookingsViewController" bundle:nil] autorelease];
navController5=[[UINavigationController alloc] initWithRootViewController:viewController5];
}
self.tabBarController = [[[UITabBarController alloc] init] autorelease];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:navController,navController2,navController3,navController4,navController5,nil];
//self.window.rootViewController =self.navController;
self.window.rootViewController=self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}

Answer 2

I always follow this approach when I have both a UINavigationController and a UITabbarController:
You need to start with a view based application. And then create a UITabbarController in your appDelegate file.
Appdelegate.h
UITabBarController *tabBarController;
// set properties
Appdelegate.m
// Synthesize
tabBarController = [[UITabBarController alloc] init];
tabBarController.delegate=self;
// Adding Search,Nearby,Map,AboutUs,Favorites Tabs to tabBarController
Search * search = [[Search alloc] init];
UINavigationController *searchNav = [[UINavigationController alloc] initWithRootViewController:search];
Nearby* nearby = [[Nearby alloc] init];
UINavigationController *nearbyNav = [[UINavigationController alloc] initWithRootViewController:nearby];
Map* map = [[Map alloc] init];
UINavigationController *mapNav = [[UINavigationController alloc] initWithRootViewController:map];
AboutUs* aboutUs = [[AboutUs alloc] init];
UINavigationController *aboutUsNav = [[UINavigationController alloc] initWithRootViewController:aboutUs];
Favorites* favorites = [[Favorites alloc] init];
UINavigationController *favoritesNav = [[UINavigationController alloc] initWithRootViewController:favorites];
NSArray* controllers = [NSArray arrayWithObjects:searchNav,nearbyNav,mapNav,aboutUsNav,favoritesNav, nil];
tabBarController.viewControllers = controllers;
[window addSubview:tabBarController.view];
You can accordingly manage in which tab you want to place navigation controller or only a view controller.
Then in each of the view controllers mentioned above you need to implement
- (id)init {}
in which you can set Tab name and image.
I always follow this approach and it never fails. The tabs are always visible. You can make changes according to your code.