使用 UITapGestureRecognizer 使键盘隐藏，当我在 UIButton 内触摸时它不起作用 [重复]

Posted 2023-02-27

【中文标题】使用 UITapGestureRecognizer 使键盘隐藏，当我在 UIButton 内触摸时它不起作用 [重复]

【英文标题】：Using a UITapGestureRecognizer to make keyboard hides, it doesn't work when I touch inside a UIButton [duplicate]

【发布时间】：2013-09-30 08:22:24

【问题描述】：

我已经在我的头文件中声明了这个：

UITapGestureRecognizer* tap;

在viewDidLoad:

- (void)viewDidLoad

    [super viewDidLoad];
    // Do any additional setup after loading the view.

    tap = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                  action:@selector(hideKeyboard)];
    tap.enabled = NO;
    [self.view addGestureRecognizer:tap];

我添加了UITextFieldDelegate，并添加了这个：

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField

    tap.enabled = YES;

    return YES;

如果我触摸键盘以外的任何地方，它就会消失，但如果我触摸UIButton，它不会消失。

你知道为什么吗？

【问题讨论】：

看看this

【参考方案1】：

UIButton 拦截并处理触摸（不传播它）。一种选择是将您的视图控制器设置为手势识别器委托并实现该方法：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch

但在您的情况下，我认为在按下按钮时触发的方法中关闭键盘就足够了。

【参考方案2】：

 UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
    tapGestureRecognizer.delegate = self;
    tapGestureRecognizer.numberOfTapsRequired = 1;
    [self.view addGestureRecognizer:tapGestureRecognizer];


- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch 


    if (touch.view == self.button) //change it to your condition UIButton
        return NO;
    
    return YES;


-(void)dismissKeyboard

    [self.textField resignFirstResponder];

【参考方案3】：

为用户按下按钮时添加目标-动作配对：

[button addTarget:self
           action:@selector(dismissKeyboard)
 forControlEvents:UIControlEventTouchDown];