Set up navigation inside view controller

gistfile1.m

// Note-- @interface ContainingViewController : UIViewController <UINavigationControllerDelegate, UITabBarControllerDelegate>

-(void) setUpNav {   
    // create tab bar controller and array to hold the view controllers
    UITabBarController *tabBarController = [[UITabBarController alloc] init];
    [tabBarController.view setFrame:CGRectMake(0, 0, 300, 100)];
    
    NSMutableArray *localControllersArray = [[NSMutableArray alloc] initWithCapacity:1];

    UIViewController *view1 = [[UIViewController alloc] init];
    
    view1.title = @"View 1";
    view1.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemSearch tag:0];

    UINavigationController *firstNavController = [[UINavigationController alloc] initWithRootViewController:view1];
    firstNavController.navigationBar.barStyle = UIBarStyleBlack;
    firstNavController.delegate = self;
    
    [localControllersArray addObject:firstNavController]; 
    
    tabBarController.viewControllers = localControllersArray;
    
    tabBarController.delegate = self;
    
    self.tabBarController.selectedIndex = 0;
    
    [self.view addSubview:tabBarController.view];
}