ios 去掉屏幕键盘的方法

//定义两个文本框
UITextField *textName;
UITextField *textSummary;

//点击return 按钮 去掉
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}
//点击屏幕空白处去掉键盘
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self.textName resignFirstResponder];
    [self.textSummary resignFirstResponder];
}

       在iOS开发中，对UITextField进行编辑的时候键盘会自己弹出来。在编辑完成的时候，需要将键盘隐藏掉。隐藏键盘有很多种实现方法，最常见的是把TextField的firstResponder resign掉，即[textField resignFirstResponder]。

下面介绍的是如何在键盘显示的时候，点击屏幕除了键盘以外的任何地方，将键盘隐藏。

基本思想如下: 1. 在ViewController载入的时候，将键盘显示和消失的Notification添加到self.view里。 2. 分别在键盘显示和消失时添加和删除TapGestureRecognizer 就这么简单。

示例代码如下: UIViewController的源代码里:

- (void)viewDidLoad
{
    [super viewDidLoad];
  
  [self setUpForDismissKeyboard];
}
- (void)setUpForDismissKeyboard {

  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
  UITapGestureRecognizer *singleTapGR =
  [[UITapGestureRecognizer alloc] initWithTarget:self
                                          action:@selector(tapAnywhereToDismissKeyboard:)];
  NSOperationQueue *mainQuene =[NSOperationQueue mainQueue];
  [nc addObserverForName:UIKeyboardWillShowNotification
                  object:nil
                   queue:mainQuene
              usingBlock:^(NSNotification *note){
                [self.view addGestureRecognizer:singleTapGR];
              }];
  [nc addObserverForName:UIKeyboardWillHideNotification
                  object:nil
                   queue:mainQuene
              usingBlock:^(NSNotification *note){
                [self.view removeGestureRecognizer:singleTapGR];
              }];
}

- (void)tapAnywhereToDismissKeyboard:(UIGestureRecognizer *)gestureRecognizer {
//此method会将self.view里所有的subview的first responder都resign掉
  [self.view endEditing:YES];
}