Using a navigationcontoller with a tabbar controller - ios

Question

I'm trying to make it so I have a tab bar at the bottom of my screen, and it's always there. I also want it so if I "click" into some menu in one of the tabs, it gives you the option to go back, thus a navigation controller and a tab bar controller.
I still don't really understand iOS, so the answer I found is confusing me.
This Answer: Having a UITabBar AND a UINavigationController in an app?
So how do I implement this? I'm guessing I change this method in my App Delegate,
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
UIViewController *viewController1, *viewController2;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
viewController1 = [[CFSDFirstViewController alloc] initWithNibName:#"CFSDFirstViewController_iPhone" bundle:nil];
viewController2 = [[CFSDSecondViewController alloc] initWithNibName:#"CFSDSecondViewController_iPhone" bundle:nil];
} else {
viewController1 = [[CFSDFirstViewController alloc] initWithNibName:#"CFSDFirstViewController_iPad" bundle:nil];
viewController2 = [[CFSDSecondViewController alloc] initWithNibName:#"CFSDSecondViewController_iPad" bundle:nil];
}
self.tabBarController = [[UITabBarController alloc] init];
[self.tabBarController setDelegate:self];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
Thanks for your assistance!

Answer 1

First of all you don't need to to manually set up the nib name. You could just name them CFSDFirstViewController~iphone.xib and CFSDFirstViewController~ipad.xib. Then you can call [[CFSDFirstViewController alloc] init] and let iOS do the rest for you. For info see iOS Supports Device-Specific Resources.
About your question, you can only insert the UINavigationController within the UITabBarController. To do it wrap viewController1 within a UINavigationController like the following:
CFSDFirstViewController viewController1 = [[CFSDFirstViewController alloc] init];
UINavigationController* navController = [[UINavigationController alloc] initWithRootViewController:viewController1];
and then use navController instead of viewController1 like the folliwing
self.tabBarController.viewControllers = [NSArray arrayWithObjects:navController, nil];
Check the code because I wrote by hand. And pay attention to memory if you use a non-ARC project.
Hope it helps.