title: How do I add a view at the top of a UICollectionView for supporting things like a search bar or filter in objective-c?
body: <p>I'm trying to add filters at the very top of the collection view so customers can refine and filter results or even change the way results are displayed. I'd like to achieve the look of the image below.</p>
  
  <p><img src="https://i.stack.imgur.com/EzGzJ.jpg" alt="enter image description here"></p>