title: iOS Image scroller animation behaviour
body: <p>I'm building an image slider/scroll component.
  So far i've used UIScrollView with paging turned on,
  every view has it's own image and all works just fine :)</p>
  
  <p>But...when an image "slide away" from the main view,
  it doesn't fade nicely like it should (like the default behaviour),
  it just disappears.</p>
  
  <p>How can I change the scrollview animation behaviour?</p>
  
  <p>Thanks!</p>