iPhone X 设备UITextField输入框清空按钮点击失

iPhone X 等设备UITextField输入框自带的清空按钮，点击清空时失效，原因是：

在该界面添加了如下隐藏键盘的方法，导致点击UITextField的清空按钮失效

  UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(keyboardHide:)];

    tapGestureRecognizer.delegate=self;

- (void)keyboardHide:(UITapGestureRecognizer*)tap {

    [self.backViewendEditing:YES];

}

解决方式：

1、先设置当前界面为tapGestureRecognizer的代理，并遵守UIGestureRecognizerDelegate协议

 UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(keyboardHide:)];

    tapGestureRecognizer.delegate=self;

2、实现代理方法

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

    if ([touch.view isKindOfClass:[UIButton class]]) {

        returnNO;

    }

    return YES;

}