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

// Override point for customization after application launch.
tabBarController.delegate = self;

// Add the tab bar controller's view to the window and display.
self.window.rootViewController = self.tabBarController;
[self addTabBarArrow];

LoginViewController *loginViewController = [[LoginViewController alloc] init];;
[window addSubview:tabBarController.view];
[self.tabBarController presentModalViewController:loginViewController animated:YES];
[window makeKeyAndVisible];
return YES; }

@protocol PassUserInfoDelegate <NSObject>
@required
- (void) passUserInfo: (NSString *)string;
@end

-(void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSString *respuestaServidor = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
self.responseData = nil;

NSDictionary *dictionary = [respuestaServidor JSONValue];
idJson = [dictionary objectForKey:@"id"];
NSString *user_loginJson = [dictionary objectForKey:@"user_login"];

if ([idJson isEqualToString:@"null"] && [user_loginJson isEqualToString:@"null"]) {
    NSLog(@"Login incorrecto");
} else {
    NSLog(@"Procedo a loguear usuario");
}
[indicator stopAnimating];
[indicator release];
}

@interface HomeViewController : UIViewController <PassUserInfoDelegate> {
LoginViewController *protocolTest;
IBOutlet UILabel *nombreUsuario;
NSString *usuario;
}
@property (nonatomic, retain) IBOutlet UILabel *nombreUsuario;
@property (copy) NSString *usuario;

- (void) passUserInfo:(NSString *)string;

@end

- (void) passUserInfo:(NSString *)jSonString
{
    userName.text = [[NSString alloc] initWithFormat:@"Welcome %@", jSonString];
}

-(void) viewDidAppear:(BOOL)animated{
protocolTest = [[LoginViewController alloc] init];
[protocolTest setDelegate:self];
[protocolTest loginSuccess];
}

- (void)loginSuccess
{
    [[self delegate] passUserInfo:idJson];
}

[[self delegate] passUserInfo:@"hello"];