学步园

//
//  IMGViewController.h
//  HackKeyboard
//
//  Created by Mamong on 13-8-26.
//  Copyright (c) 2013年 Mamong. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface IMGViewController : UIViewController<UITextFieldDelegate>


@property (strong, nonatomic) UITextField *nameTF;
@property (strong, nonatomic) UITextField *ageTF;
@property (strong, nonatomic) UITextField *countryTF;

@end

//
//  IMGViewController.m
//  HackKeyboard
//
//  Created by Mamong on 13-8-26.
//  Copyright (c) 2013年 Mamong. All rights reserved.
//

#import "IMGViewController.h"

@interface IMGViewController ()

@property (strong, nonatomic) UIView *keyboardView;

@end

@implementation IMGViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view.
    UILabel *labelName = [[UILabel alloc]initWithFrame:CGRectMake(20.0, 50.0, 60.0, 30.0)];
    labelName.text = @"Name:";
    [self.view addSubview:labelName];
    
    UILabel *labelAge = [[UILabel alloc]initWithFrame:CGRectMake(20.0, 100.0, 40.0, 30.0)];
    labelAge.text = @"Age:";
    [self.view addSubview:labelAge];
    
    UILabel *labelCountry = [[UILabel alloc]initWithFrame:CGRectMake(20.0, 150.0, 80.0, 30.0)];
    labelCountry.text = @"Country:";
    [self.view addSubview:labelCountry];
    
    _nameTF = [[UITextField alloc]initWithFrame:CGRectMake(120.0, 50.0, 100.0, 30.0)];
    _nameTF.tag = 100;
    _nameTF.borderStyle = UITextBorderStyleRoundedRect;
    _nameTF.keyboardType = UIKeyboardTypeAlphabet;
    _nameTF.delegate = self;
    [self.view addSubview:_nameTF];
    
    _ageTF  = [[UITextField alloc]initWithFrame:CGRectMake(120.0, 100.0, 100.0, 30.0)];
    _ageTF.tag = 101;
    _ageTF.borderStyle = UITextBorderStyleLine;
    _ageTF.keyboardType = UIKeyboardTypeNumberPad;
    _ageTF.delegate = self;
    [self.view addSubview:_ageTF];
    
    _countryTF  = [[UITextField alloc]initWithFrame:CGRectMake(120.0, 150.0, 100.0, 30.0)];
    _countryTF.tag = 102;
    _countryTF.borderStyle = UITextBorderStyleBezel;
    _countryTF.keyboardType = UIKeyboardTypeAlphabet;
    _countryTF.returnKeyType = UIReturnKeyDone;
    _countryTF.delegate = self;
    [self.view addSubview:_countryTF];
    
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
    
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardDidDisappear:) name:UIKeyboardDidHideNotification object:nil];
    
}

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

- (void)keyboardDidShow:(NSNotification *)notification
{
   
     [self hackViewForKeyboard];
    
}

- (void)keyboardDidDisappear:(NSNotification *)notification
{
    [[_keyboardView viewWithTag:1000] removeFromSuperview];
    [[_keyboardView viewWithTag:1001] removeFromSuperview];
}



- (void)hackViewForKeyboard
{
    _keyboardView = [self findKeyboardView];
    UIButton *hackButton;
    
	if(_keyboardView &&[_nameTF isFirstResponder]) {
        
       [[_keyboardView viewWithTag:1001] removeFromSuperview];
        
        hackButton = [UIButton buttonWithType:UIButtonTypeCustom];
        hackButton.tag = 1000;
        hackButton.frame = CGRectMake(3.0, 174.0, 75.0, 41.0);
        
        hackButton.backgroundColor = [UIColor darkGrayColor];
        [hackButton setTitle:@".?123" forState:UIControlStateNormal];
        [hackButton setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
        [_keyboardView addSubview:hackButton];
        
    }
    
    if (_keyboardView &&[_ageTF isFirstResponder]) {
        
        [[_keyboardView viewWithTag:1000] removeFromSuperview];
       
        hackButton = [UIButton buttonWithType:UIButtonTypeCustom];
        hackButton.tag = 1001;
        hackButton.frame = CGRectMake(0.0, 163.0, 106.0, 53.0);
        [hackButton setTitle:@"Return" forState:UIControlStateNormal];
        [hackButton setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
        [hackButton addTarget:self action:@selector(returnButtonDone:) forControlEvents:UIControlEventTouchUpInside];
        [_keyboardView addSubview:hackButton];
    }
    
}

- (void)returnButtonDone:(id)sender
{
    [_countryTF becomeFirstResponder];
}




- (UIView*)findKeyboardView
{
	NSArray* windowList														= [[UIApplication sharedApplication] windows];
	for(UIWindow* theWindow in [windowList reverseObjectEnumerator])
	{
		for(UIView* theView in [theWindow subviews])
		{
			if(!strcmp(object_getClassName(theView), "UIPeripheralHostView") || !strcmp(object_getClassName(theView), "UIKeyboard"))
			{
				return theView;
			}
		}
	}
	
	return nil;
}




#pragma mark
#pragma UITextFieldDelegate Methods

-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    switch (textField.tag) {
        case 100:
            [_ageTF becomeFirstResponder];
            break;
         
        case 102:
            [_countryTF resignFirstResponder];
            break;
            
        default:
            break;
    }
    return YES;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    
    [[NSNotificationCenter defaultCenter]postNotificationName:UIKeyboardDidShowNotification object:nil];
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    [[NSNotificationCenter defaultCenter]postNotificationName:UIKeyboardDidHideNotification object:nil];
    
}



@end

效果图：