UIGestureRecognizer测定Tap

Question

我跟着这个答案说：https://stackoverflow.com/a/12481177/2575115

但我得到了一个错误的“预期的表达”。我做错了什么？

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

    if (gestureRecognizer == tap) { //Expected Expression
        shouldReceiveTouch = (touch.view == _shownImage);
    }
    return shouldReceiveTouch;
}

Answer 1

您可以检查UIGestureRecognizer类

-(BOOL) gestureRecognizer: (UIGestureRecognize *) gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer: (UIGestureRecognizer *) otherGestureRecognizer {
if ([gestureRecognizer isMemberOfClass: [UITapGestureRecognizer class]]) {

shouldReceiveTouch = (touch.view == _shownImage);    

     }
}

Answer 2

您必须通过tap(UITapGestureRecognizer)检查您的UIGestureRecognizer手势是否是isMemberOfClass的成员。

-(BOOL) gestureRecognizer: (UIGestureRecognize *) gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer: (UIGestureRecognizer *) otherGestureRecognizer {
    if ([gestureRecognizer isMemberOfClass: [tap class]]) {// please check this one
    }
   }