iOS 虚拟键盘添加view

转自：http://blog.youkuaiyun.com/duxinfeng2010/article/details/8269644

思路基本一样，不过考虑到显示效果，去除了很多不必要的代码，自己更改了下

#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UITextField *textField;

@property (strong, nonatomic) UIView *exitButton;

@property (weak, nonatomic) UIButton *cancleButton;

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    _exitButton = [[UIButton alloc] init];

    CGRect exitBtFrame = CGRectMake(0, self.view.frame.size.height , self.view.frame.size.width, 30.0f);

    

    [_exitButton setFrame:exitBtFrame];

    _exitButton.backgroundColor = [UIColor grayColor];

    

    UIButton *returnButton = [[UIButton alloc] initWithFrame:CGRectMake(_exitButton.bounds.size.width - 50, 0, 50, 30)];

    returnButton.backgroundColor = [UIColor redColor];

    [returnButton setTitle:@"完成" forState:UIControlStateNormal];

    [returnButton addTarget:self action:@selector(CancelBackKeyboard:) forControlEvents:UIControlEventTouchDown];

    

    [_exitButton addSubview:returnButton];

    [self.view addSubview:_exitButton];

    

   

    

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardDidShow:) name:UIKeyboardWillShowNotification object:nil];

    

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

    NSLog(@"%@",_exitButton);

}

- (void)handleKeyboardDidShow:(NSNotification *)notification

{

    NSDictionary *info = [notification userInfo];

    CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue].size;

    CGFloat distanceToMove = kbSize.height;

    [self adjustPanelsWithKeyBordHeight:distanceToMove];

}

- (void)handleKeyboardWillHide:(NSNotification *)notification

{

    if (_exitButton) {

        CGRect exitBtFrame = CGRectMake(0, self.view.frame.size.height, self.view.frame.size.width, 30.0f);

        _exitButton.frame = exitBtFrame;

        [self.view addSubview:_exitButton];

    }

}

-(void)adjustPanelsWithKeyBordHeight:(float) height

{

    if (_exitButton) {

        CGRect exitBtFrame = CGRectMake(0, self.view.frame.size.height - height-30, self.view.frame.size.width, 30.0f);

        _exitButton.frame = exitBtFrame;

        [self.view addSubview:_exitButton];

    }

}

-(void)CancelBackKeyboard:(id)sender

{

    [_textField resignFirstResponder];

    

}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    [self.textField resignFirstResponder];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end