iOS/iPhone Username and Password Popup - UIAlertView (Objective-C,iPhone)

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Please Login"
                                                      message:@"กรุณากรอก ชื่อผู้ใช้ และ รหัสผ่าน "
                                                     delegate:self
                                            cancelButtonTitle:@"Cancel"
                                            otherButtonTitles:@"Login", nil];
    
    [alert setAlertViewStyle:UIAlertViewStyleLoginAndPasswordInput];
    
    [alert show];
    [alert release];

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
        UITextField *username = [alertView textFieldAtIndex:0];
        UITextField *password = [alertView textFieldAtIndex:1];
        lblUsername.text = [username text];
        lblPassword.text = [password text];;
}

//
//  ViewController.h
//
//  Created by Weerachai on 10/27/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
    IBOutlet UILabel *lblPassword;
    IBOutlet UILabel *lblUsername;
}

- (IBAction)btnLogin:(id)sender;

@end

//
//  ViewController.m
//
//  Created by Weerachai on 10/27/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)dealloc {           
    [lblUsername release];
    [lblPassword release];
    [super dealloc];
}

- (IBAction)btnLogin:(id)sender {
    
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Please Login"
                                                      message:@"กรุณากรอก ชื่อผู้ใช้ และ รหัสผ่าน "
                                                     delegate:self
                                            cancelButtonTitle:@"Cancel"
                                            otherButtonTitles:@"Login", nil];
    
    [alert setAlertViewStyle:UIAlertViewStyleLoginAndPasswordInput];
    
    [alert show];
    [alert release];
    
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    
    
    NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
    
    if([title isEqualToString:@"Login"])
    {
        UITextField *username = [alertView textFieldAtIndex:0];
        UITextField *password = [alertView textFieldAtIndex:1];
        lblUsername.text = [username text];
        lblPassword.text = [password text];;
    }
    
    if([title isEqualToString:@"Cancel"])
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert!"
                                                        message:@"Your Select Cancel"
                                                       delegate:self
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil, nil];
        [alert show];
        [alert release];
    }
    
    
}

@end