Question

I’m trying to add a UINavigationController to my existing view controller by adding this in ViewDidLoad:

- (void)viewDidLoad
{
    [super viewDidLoad];

    navController = [[UINavigationController alloc]init];

    [self.view addSubview:navController.view];
}

But by doing it this way, it completely blocks my view. It puts a UINavigationBar on the top but the rest of the view doesn’t respond to input.

This is how I am presenting the view. The SecondViewController is the one I want to have a NavController:

UITabBarController *tabController = [[UITabBarController alloc] init];

FirstViewController *viewController1 = [[FirstViewController alloc] initWithNibName:@"CardsViewController" bundle:nil];

UITabBarItem *tab1 = [[UITabBarItem alloc] initWithTitle:@"First" 
                                                   image:[UIImage imageNamed:@"img1.png"] tag:1];
[viewController1 setTabBarItem:tab1];    

SecondViewController *viewController2 = [[SecondViewController alloc] initWithNibName:@"ShoppingViewController" bundle:nil];

UINavigationController *SecondViewNavCont = [[UINavigationController alloc]initWithRootViewController:viewController2];

UITabBarItem *tab2 = [[UITabBarItem alloc] initWithTitle:@"Second" 
                                                   image:[UIImage imageNamed:@"img2.png"] tag:2];
[SecondViewNavCont setTabBarItem:tab2];

UIViewController *viewController3 = [[UIViewController alloc] init];
UITabBarItem *tab3 = [[UITabBarItem alloc] initWithTitle:@"Third" 
                                                   image:[UIImage imageNamed:@"img3.png"] tag:3];
[viewController3 setTabBarItem:tab3];


tabController.viewControllers = [NSArray arrayWithObjects:viewController1, 
                                 viewController2, 
                                 viewController3, 
                                 nil];

[self.view addSubview:tabController.view];

Answer 1

You cannot add it to the current view controller
What you need to do is instead of presenting the ViewController is to add this viewcontroller to the navigationview controller and present that

UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:YourPresentedViewController];
//then present the navController
[self presentModalViewController:navController animated:YES];

Now when you present it do the following

NSArray arrayWithObjects:viewController1, 
                                 SecondViewNavCont, 
                                 viewController3, 
                                 nil];