IOS login screen before tab-controller view - xcode

Question

I am still newbie for IOS Developing, i want to create a login page by MoralViewcontroller.
AppDelegate.h
#interface AppDelegate : UIResponder <UIApplicationDelegate>{
UITabBarController *tabBarController; }
#property (nonatomic,retain) IBOutlet UITabBarController * tabBarController
AppDelegate.m
(void)applicationDidFinishLaunching:(UIApplication *)application
{
// Override point for customization after app launch
[window addSubview:tabBarController. view];
[window makeKeyAndVisible];
LoginViewController *loginView=[[LoginViewController alloc]initWithNibName:#"LoginViewController" bundle:nil];
[tabBarController.view presentModelViewcontroller: loginView animated:YES];
}
However, the login view cannot be shown, I think I define wrongly for tabBarController, but I don't know what wrong with it. Can anyone please advise me? I am doing IOS 5.
Thanks alot..

Answer 1

I'd present a loginView controller from the rootView of the tabBarController.
-(void)viewDidLoad
{
//You can also do this inside a conditional statement, if needed
LoginViewController *loginView=[[LoginViewController alloc]initWithNibName:#"LoginViewController" bundle:nil];
[self.view presentModelViewcontroller:loginView animated:YES];
}
And here is the second way
AppDelegate.h
#interface AppDelegate : UIResponder {
LoginViewController *loginView;
}
#property (nonatomic,retain) LoginViewController *loginView;
AppDelegate.m
-(void)applicationDidFinishLaunching:(UIApplication *)application
{
// Override point for customization after app launch
self.loginView=[[LoginViewController alloc]initWithNibName:#"LoginViewController" bundle:nil];
[window addSubview:loginView. view];
[window makeKeyAndVisible];
}
LoginViewController.m
Call this method on successful login.
-(IBAction)login:(id)sender
{
//init tabbar with subviews;
UITabBarController *tabBarController = [[UITabBarController alloc] initW....];
[self.view addSubview:tabBarController.view];
}
I prefer first method, because in that you will be retaining the tabBarController in AppDelegate.

Answer 2

First of all you have to add the Loginviewcontroller to the window.And then you have to add the tabbarcontroller to the LoginViewController when the login button clicked.