ios remove tabbar on button touch - objective-c

Question

I've a tab bar based project created and added a login view prior to tab view like this.
AppDelgate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
loginView = [[LoginViewController alloc] initWithNibName:#"LoginViewController" bundle:nil];
loginView.delegate = self;
[window addSubview:loginView.view];
[self.window makeKeyAndVisible];
return YES;
}
-(void) loginViewControllerDidFinish:(LoginViewController *) loginViewController{
[window addSubview:tabBarController.view];
}
I'm calling loginViewControllerDidFinish: after authentication in LoginViewController as
[self.delegate loginViewControllerDidFinish:self];
Now in one of the tabs i've added logout button and want to come back to loginView on touch.
-(IBAction) logout:(id)sender{
NMSAppDelegate *appDelegate = (NMSAppDelegate *)[[UIApplication sharedApplication] delegate];
//[appDelegate.tabBarController release];
[appDelegate.tabBarController.view removeFromSuperview];
}
it shows the loginView after calling the above method but after re-login it shows all the previous data and previously selected tab but i want it to be afresh from the first tab.Is there anyway to completely delete the tabbar on logout.so that i'm starting the new session.
Thanks

Answer 1

Cant you create another instance of appDelegate.tabBarController ?
Something like this:
appDelegate.tabBarController = [[UITabBarController alloc] init];
appDelegate.tabBarController.viewControllers = [NSArray arrayWithObject:VIEW_CONTROLLER1, VIEW_CONTROLLER2,nil];
appDelegate.window.rootViewController = tabBarController;
[appDelegate.window makeKeyAndVisible];