UITapGestureRecognizer to dimiss keyboard overrides button

Question

I have a couple of UITextField and UIButton inside a UIScrollView and this scroll view is inside a view of my UIViewController. I added a touch gesture recognizer to dismiss the keyboard if shown:

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
}

The issue is that when I tap the signin/signup button it still detects the tap gesture, in which I actually want the button touch.

Daniel Daniel · Accepted Answer · 2012-10-11T20:52:12

The touched view should be the button themselves, so doing

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

    return YES; // handle the touch
}

should work for you, isDescendantOfView returns false because that view IS the button you are trying to have clicked...similarly if you want to just let any button through you can do

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

hope that helped

Daniel

UITapGestureRecognizer to dimiss keyboard overrides button

3 Answers