title: Parallax view scrolling (Yahoo weather like)
body: <p>This is not strictly a programming question but more "how to accomplish this" question.</p>
  
  <p>I am curious (and working on an app that will probably require this) how is left-right parallax scrolling implemented. To know exactly what I mean check the Yahoo Weather app (it's free - no worries there).</p>
  
  <p>Are they using just one view controller or a separate controller for each view that is shown there?<br>
  What is the easiest way to implement this? I have found <a href="https://stackoverflow.com/questions/10400709/how-can-i-implement-a-swiping-sliding-animation-between-views">this topic here</a> which kinda explains it a bit but when are they getting information from their servers? Is it when the views are changed or at the startup of the app?</p>
  
  <p>Any information how to implement such scrolling would be much appreciated.</p>