同方向scrollView嵌套处理

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    if ([otherGestureRecognizer.view isMemberOfClass:[UIScrollView class]]) {
        NSLog(@"NO");
        //禁止otherGestureRecognizer手势
        return NO;
    }
    else {
        NSLog(@"yes");
//两手势同时起效
        return YES;
    }
}