i added tabs but views outside tabs became unreachable (ios) - ios

Question

my original app had 5 home screen views and buttons in the home screens would open different other views.
i am not using storyboards. orignally there were no tabs in the app. then i added tabs to display the home screen using
UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil] ;
UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
UIViewController *viewController3 = [[ThirdViewController alloc] initWithNibName:#"ThirdViewController" bundle:nil];
UIViewController *viewController4 = [[FourthViewController alloc] initWithNibName:#"FourthViewController" bundle:nil];
UIViewController *viewController5 = [[FifthViewController alloc] initWithNibName:#"FifthViewController" bundle:nil];
UINavigationController *navigationController1=[[UINavigationController alloc]initWithRootViewController:viewController1];
[navigationController1.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationController *navigationController2=[[UINavigationController alloc]initWithRootViewController:viewController2];
[navigationController2.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationController *navigationController3=[[UINavigationController alloc]initWithRootViewController:viewController3];
[navigationController3.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationController *navigationController4=[[UINavigationController alloc]initWithRootViewController:viewController4];
[navigationController4.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationController *navigationController5=[[UINavigationController alloc]initWithRootViewController:viewController5];
[navigationController5.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UITabBarController *tabBarController= [[UITabBarController alloc] init];
tabBarController.viewControllers = #[navigationController1, navigationController2,navigationController3,navigationController4,navigationController5];
//self.window.rootViewController = self.tabBarController;
UIWindow *window = [[UIApplication sharedApplication] delegate].window;
[window addSubview:tabBarController.view]
;
but now when i click the buttons on the homescreen how do i show the views which are outside the tabs ? and how do i comeback from that view to the 5 homescreen tab view.
earlier i was using this code to show the views on button press
listController = [[MenuListController alloc] initWithNibName:#"MenuListController" bundle:nil];
SUP101AppDelegate *delegate6 = [[UIApplication sharedApplication] delegate];
[delegate6.navController pushViewController:listController animated:YES]

Answer 1

You can launch other viewControllers by simply presenting them on the tabController now.
listController = [[MenuListController alloc] initWithNibName:#"MenuListController" bundle:nil];
SUP101AppDelegate *delegate6 = [[UIApplication sharedApplication] delegate];
[self.tabBarController presentViewController:listController animated:YES completion:nil];
you should also set the tabController to be window RootViewController
self.window.rootViewController = tabBarController;
//[window addSubview:tabBarController.view]