How to insert UINavigationController inside UITabBarController - ios

Question

How to insert UINavigationController inside UITabBarController.
Currently I have main UITabBarController with declatarion inside application delegate like this (so tab is main)
self.window.rootViewController = self.tabBarController;
And inside one of tabs I want to insert UINavigationController, and can't get it.
The code is contructed like this:
MainWindow.xib with UITabBarController object with tab typed as UINavigationController (point to NavigationHistory.xib) - screenshot: invalid link
NavigationHistory.xib contains only UINavigationController where view point to History.xib
History.xib have only UITableView element - screenshot: invalid link
And now UIViewController doesn't display my View1 view, and I have no clue why it may be. Maybe you have any clue? or point me to the place where such configuration is done.

Answer 1

I'll answer myself. It's good explained at
https://developer.apple.com/library/ios/#documentation/WindowsViews/Conceptual/ViewControllerCatalog/Chapters/CombiningViewControllers.html

Answer 2

Write a code in appdelegate.m file.....
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
NSMutableArray *Mutablearray = [[NSMutableArray alloc] init];
UIViewController *1st_View = [[FirstViewController alloc] initWithNibName:#"FirstViewController_iPhone" bundle:nil];
UINavigationController *Navigation = [[UINavigationController alloc] initWithRootViewController:1st_View];
[Mutablarray addObject:Navigation];
UIViewController *2nd_View = [[SecondViewController alloc] initWithNibName:#"SecondViewController_iPhone" bundle:nil];
UINavigationController *Navigation = [[UINavigationController alloc] initWithRootViewController:2nd_View];
[Mutablearray addObject:Navigation];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = Mutablearray;
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}

Answer 3

Add your controller object to UINavigationController, and add that navigationcontroller object to UITabBarController

Answer 4

UINavigationController is a subclass of UIViewController, a UITabBarController expects an array of UIViewControllers (and therefore UINavigationController ); this tells me me that I can give a UITabBarController an array of UINavigationControllers (or sublasses thereof) giving the desired interaction.
Ref : https://developer.apple.com/library/ios/documentation/UIKit/Reference/UINavigationController_Class/
https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITabBarController_Class/

Answer 5

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UITabBarController *tab = [[UITabBarController alloc] init];
SimpleTableViewController *tableView = [[SimpleTableViewController alloc] init];
UINavigationController *nav1 = [[UINavigationController alloc] initWithRootViewController:tableView];
UITabBarItem *item = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemHistory tag:0];
nav1.tabBarItem = item;
AboutViewController *about = [[AboutViewController alloc] init];
UINavigationController *nav2 = [[UINavigationController alloc] initWithRootViewController:about];
UITabBarItem *item2 = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFeatured tag:0];
nav2.tabBarItem = item2;
tab.viewControllers = #[nav1,nav2];
self.window.rootViewController = tab;
[self.window makeKeyAndVisible];
return YES;
}