_scrollView.contentOffset = CGPointZero;
    _scrollView.frame = CGRectMake(0, 0,
                        _scrollView.contentSize.width,
                        _scrollView.contentSize.height);
           
    //_scrollView.contentOffset = CGPointZero; // Don't change the offset
    _scrollView.frame = CGRectMake(0, 0,
                        _scrollView.contentSize.width,
                        _scrollView.contentSize.height - _scrollView.contentOffset);