title: 'NSInvalidArgumentException', reason: '-[UIView setPDFPage:]: unrecognized selector sent to instance when integrating ZoomingPDFViewer
body: <p>Just wanted to know if anyone can help me fix an issue with ZoomingPDFViewer. For some reason it seems my view is not working even though this is declared correctly (AFAIK).</p>
  
  <p>The only difference I can see is the connections inspector in my app looks like this:
  <img src="https://i.stack.imgur.com/eDquQ.png" alt="MyApp connections inspector"></p>
  
  <p>and the connections inspector in the example app looks like this:</p>
  
  <p><img src="https://i.stack.imgur.com/LkJE2.png" alt="example app connections inspector"></p>
  
  <p>Does anyone know if this could be a problem? and if it is a problem, can anyone tell me how to make this work?</p>