Fixed Header-View at top of UIScrollView
<p>my question is similar to this question: <a href="https://stackoverflow.com/questions/11272847/make-uiview-in-uiscrollview-stick-to-the-top-when-scrolled-up">make UIView in UIScrollView stick to the top when scrolled up</a></p>

<p>How should I modify the code to keep the header fixed at the top WHEN I scroll DOWN.</p>