ios - UITextfield 的清除按钮在 UIScrollView 内部隐藏键盘

Question

我在 UIScrollView 中有一个文本字段，我想在用户开始编辑时显示一个清除按钮。当用户点击 UIScrollview 的背景(而不是文本字段)时，我还需要隐藏键盘。显示那个清除按钮不是问题，问题是当点击清除按钮时键盘被隐藏并且文本字段没有被清除。显然问题出在手势识别器上，因为处理此问题的方法在单击清除按钮时被触发(但在点击文本字段时不会被触发)。这是我的代码:

    //adding gesture recognizer so i can hide keyboard when user taps scrollview
    - (void) textFieldDidBeginEditing:(UITextField *)textField
    {
        if (self.tapOutside == nil) self.tapOutside = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(textFieldTouchOutSide:)];

        [self.scrollView addGestureRecognizer:self.tapOutside];
    }

    //This hides keyboard BUT IS ALSO CALLED WHEN CLEAR BUTTON IS TAPPED
    - (void)textFieldTouchOutSide:(id)sender
    {
        [self.textfield resignFirstResponder];
    }

    //NEVER GETS CALLED
    - (BOOL) textFieldShouldClear:(UITextField *)textField {
        return YES;
    }

有什么解决办法吗？也许添加手势识别器的更好方法？我想不出任何优雅的解决方案...提前致谢...

Answer 1

我遇到了同样的问题，并通过以下方法解决了它:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    // Disallow recognition of gestures in unwanted elements
    if ([touch.view isMemberOfClass:[UIButton class]]) { // The "clear text" icon is a UIButton
        return NO;
    }
    return YES;
}

不要忘记遵守“UIGestureRecognizerDelegate”协议(protocol)并设置委托(delegate)(使用您的变量):

self.tapOutside.delegate = self;

干杯