iOS TabBarController as rootViewController

TabBarController.m

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
    
    self.tabBarController = [[UITabBarController alloc] init];
    
    SquaresViewController *squaresViewController = [[SquaresViewController alloc] initWithNibName:@"SquaresViewController" bundle:nil];
    ScrollViewController *scrollViewController = [[ScrollViewController alloc] initWithNibName:@"ScrollViewController" bundle:nil];
	
	TableView* tableViewController =[[TableView alloc]initWithStyle:UITableViewStylePlain];
    self.tabBarController.viewControllers = @[squaresViewController,scrollViewController,tableViewController];
    
    
    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
	
	
}