title: Shared iAD over different ViewControllers
body: <p>I have 3 ViewControllers that I would like to share the same iAD. I have read the documentation and sharing the iAD seems to be the proper way to implement iAD into your project. What is the best way to accomplish this? I am newer to Objective C so as detailed as you could be is appreciated.</p>
  
  <p>Thank you in advance, </p>