Create Tabbar without XIB(1)

gistfile1.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:
        (NSDictionary *)launchOptions
{
    UITabBarController *tabBarController = [[UITabBarController alloc] init];
    [self.window setRootViewController:tabBarController];
    // iOS 4.0 이전 
    //[window addSubView:[tabBarController view]];
    [tabBarController release];

    [self.window makeKeyAndVisible];

    return YES;
}