UITapGestureRecognizer解除键盘覆盖按钮

Question

我在UIScrollView中有一些UITextField和UIButton，这个滚动视图位于我的UIViewController的视图中。我添加了一个触摸手势识别器来解除键盘，如果显示：

UITapGestureRecognizer *tapToDismissKeyboard = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(viewTapped:)];
    [tapToDismissKeyboard setCancelsTouchesInView:NO];
    tapToDismissKeyboard.delegate = self;
    [self.view addGestureRecognizer:tapToDismissKeyboard];

#pragma mark UITapGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    if ([touch.view isDescendantOfView:self.signupButton_] || [touch.view isDescendantOfView:self.profilePictureImageView_] || [touch.view isDescendantOfView:self.signupUsingFacebook_]) {
        return NO; // ignore the touch
    }

    return YES; // handle the touch
}

问题在于，当我点击登录/注册按钮时，它仍会检测到轻击手势，我实际上想要触摸按钮。

Answer 1

触摸的视图应该是按钮本身，所以这样做

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    if (touch.view==self.signupButton_ ) {
        return NO; // ignore the touch
    }

    return YES; // handle the touch
}

应该适合你，isDescendantOfView返回false，因为该视图是你试图点击的按钮...同样如果你想让任何按钮通过你可以做

if([v isKindOfClass:[UIButton class]])
{
    return  NO;  
}

希望有所帮助

丹尼尔

Answer 2

如果您在该视图中使用了按钮，那么您将在整个视图中添加添加手势识别器，而不是按钮触摸该创建插入该视图中的所有内容，然后仅为该视图添加Gesture识别器并创建另一个视图你的按钮会起作用。

Answer 3

解决此问题的方法是为按钮设置手势并将代码设置为

[tapToDismissKeyboard requireGestureRecognizerToFail:buttonTapGestureRecognizer];