title: Ionic 2 <ion-content> disable scroll
body: <p>I've tried several methods to disable scroll, including using CSS <code>position: fixed</code>, attribute <code>overflow-scroll="false"</code> and etc, but all methods failed. </p>
  
  <p>When I swipe down, the buttons will go up and while I swipe up the buttons will go down, like bouncing effect.</p>
  
  <p>May I know any solutions to this issue? Thank you very very much.</p>