iOS/iPhone Hide Input Keyboard and Validate Text Field (Password, Number, URL, E-Mail, Phone Number)

[txtName resignFirstResponder];

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    // Tap Gesture for Hide Keyboard
    UITapGestureRecognizer *oneTapGesture = [[UITapGestureRecognizer alloc]
                                             initWithTarget: self
                                             action: @selector(hideKeyboard:)];
    [oneTapGesture setNumberOfTouchesRequired:1];
    [[self view] addGestureRecognizer:oneTapGesture];
}

// Event Gesture for Hide Keyboard
- (void)hideKeyboard:(UITapGestureRecognizer *)sender {
    [txtPassword resignFirstResponder];
    [txtNumber resignFirstResponder];
    [txtURL resignFirstResponder];
    [txtEmail resignFirstResponder];
    [txtPhone resignFirstResponder];
}

//
//  ViewController.h
//  inputTextFieldsKeyboard
//
//  Created by Weerachai on 12/10/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
    
    IBOutlet UITextField *txtPassword;
    
    IBOutlet UITextField *txtNumber;
    
    IBOutlet UITextField *txtURL;
    
    IBOutlet UITextField *txtEmail;
    
    IBOutlet UITextField *txtPhone;
    
}

@end

//
//  ViewController.m
//  inputTextFieldsKeyboard
//
//  Created by Weerachai on 12/10/55 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.
    
    // Tap Gesture for Hide Keyboard
    UITapGestureRecognizer *oneTapGesture = [[UITapGestureRecognizer alloc]
                                             initWithTarget: self
                                             action: @selector(hideKeyboard:)];
    [oneTapGesture setNumberOfTouchesRequired:1];
    [[self view] addGestureRecognizer:oneTapGesture];
}

// Event Gesture for Hide Keyboard
- (void)hideKeyboard:(UITapGestureRecognizer *)sender {
    [txtPassword resignFirstResponder];
    [txtNumber resignFirstResponder];
    [txtURL resignFirstResponder];
    [txtEmail resignFirstResponder];
    [txtPhone resignFirstResponder];
}

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

- (void)dealloc {
    [txtPassword release];
    [txtNumber release];
    [txtURL release];
    [txtEmail release];
    [txtPhone release];
    [super dealloc];
}
@end