title: tableview header logo like iBooks App
body: <p>How can I insert an image in the header of a tableView so that it stays has the iBook App?
  When you scroll down, Apple's logo appears, and when you let go, is disappear?</p>
  
  <p>Is works, I guess, just like a view in the table's header, but if that's so, how to create that condition to hide like the iBooks App does?</p>
  
  <p>Thanks,</p>
  
  <p>RL</p>