I have a name and password in NSUserDefaults for login. I want to place a test in my AppDelegate.m class to test for presence and load a login/signup loginView.xib modally if there is no password or name stored in the app.

Here is the pulling of the defaults:

-(void)refreshFields {
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    usernameLabel.text = [defaults objectForKey:kUsernameKey];
    passwordLabel.text = [defaults objectForKey:kPasswordKey];

Here is the tabcontroller loading part: - (void)applicationDidFinishLaunching:(UIApplication *)application {

firstTab = [[FirstTab alloc] initWithStyle:UITableViewStylePlain];
UINavigationController *firstNavigationController = [[UINavigationController alloc] initWithRootViewController:firstTab];
[firstTab release];  

secondTab = // EDITED FOR SPACE

thirdTab =  // EDITED FOR SPACE

tabBarController = [[UITabBarController alloc] init];
tabBarController.viewControllers = [NSArray arrayWithObjects:firstNavigationController, secondNavigationController, thirdNavigationController, nil];
[window addSubview:tabBarController.view];

[firstNavigationController release];
[secondNavigationController release];
[thirdNavigationController release];

[self logout];

[window makeKeyAndVisible];

Here is where the loginView.xib loads automatically:

- (void)logout {
    loginViewController = [[LoginViewController alloc] initWithNibName:@"LoginView" bundle:nil];
    UINavigationController *loginNavigationController = [[UINavigationController alloc] initWithRootViewController:loginViewController];
    [loginViewController release];
    [tabBarController presentModalViewController:loginNavigationController animated:YES];
    [loginNavigationController release];
}

I want to replace the above autoload with a test similar to below (that works) using IF-ELSE

- (void)logout {

   if ([usernameLabel.text length] == 0 || [passwordLabel.text length] == 0)
       {
        loginViewController = [[LoginViewController alloc] initWithNibName:@"LoginView" bundle:nil];
        UINavigationController *loginNavigationController = [[UINavigationController alloc] initWithRootViewController:loginViewController];
        [loginViewController release];
        [tabBarController presentModalViewController:loginNavigationController animated:YES];
    [loginNavigationController release];



}else
{

    [window addSubview:tabBarController.view];}

Thanks in advance, I'm totally lost on this.