title: ScrollView to disappear before the top of the screen
body: <p>I have a scrollview that I want to have disappear as it scrolls across a certain point on the screen. So as you scroll, the elements on the scrollview will disappear instead of covering up the elements behind it. But if you scroll back down, it reappears.  How can I set a point on the screen that will hide the scrollview once it hits that point? I would like to accomplish this without having it "hide" behind another object. Thanks.</p>
  
  <p>Almost forgot, it's all code, no IB used.</p>