title: Pull down to search iOS
body: <p>I just need an idea of how to implement "Pull down to search" functionality in iPhone/iPad.
  I have a UITableView and when I'm at the beginning of the tableView and scroll down, I want to show a searchBar (which is hidden at start up). And after that scrolling to the bottom of the tableView I want to hide the searchBar. I've looked over the internet for some ideas and possible solutions, but that ended with no success. I need something like when you scroll down the tableView to be pushed a little bit down.</p>