title: Scaling of image on scroll in a UITableView
body: <p>I'm trying to recreate this effect -</p>
  
  <p>There's a UIImageView in the header section of a UITableView. When the user scrolls down, the size of the image reduces and scrolls under the navigation bar and when they scroll back up the UIImageView expands and comes back to it's original position. </p>
  
  <p>Twitter for iOS has this effect on your profile.</p>
  
  <p>So far this is what I know - The code will come under the scrollViewDidScroll method and I'll have to use 2 images, one large and one small. I need help figuring out how to transition between these 2 images inside the method.</p>