iOS: TabBar application with login

AppDelegate.h

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@property(nonatomic, strong) UITabBarController* tabBarController;

@end

AppDelegate.m

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    [[EJCacheService sharedCacheService] initialize];

    

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    

    MyViewController * myViewController = [[MyViewController alloc] init];

    myViewController.tabBarItem.title = @"MyViewController";

    

    self.tabBarController = [[UITabBarController alloc]init];

    self.tabBarController.viewControllers = @[myViewController];

    

    // Login and Splash setup

    LoginViewController *loginViewController = [[LoginViewController alloc] init];

    

    // If you want a navigation controller because your login has varius steps or something

    // UINavigationController *navigationController = [[UINavigationController alloc]     initWithRootViewController: loginViewController];

    // navigationController.navigationBarHidden = YES;

    // self.window.rootViewController = navigationController;

    // else 

    /self.window.rootViewController = loginViewController;

    

    self.window.backgroundColor = [UIColor whiteColor];

    [self.window makeKeyAndVisible];

    

    return YES;

}

...

@end

LoginViewController.m

Somewhere inside your LoginViewController you will push the TabBarController:

AppDelegate *appDelegate = [UIApplication sharedApplication].delegate;

    

    [UIView transitionWithView:appDelegate.window duration:0.5 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{

        appDelegate.window.rootViewController = appDelegate.tabBarController;

    } completion:nil];