title: Error with Xcode framework
body: <p>I am building a small app using the mapkit framework and I keep getting this error. I have added corelocation, mapkit everything and I have googled everywhere and cant seem to get rid of it.</p>
  
  <pre><code>_OBJC_CLASS_$_MKPinAnnotationView", referenced from: objc-class-ref-to-MKPinAnnotationView in MapViewController.o
  
  Symbol(s) not found
  </code></pre>
  
  <p>and a warning with it says <code>/MapKit.framework/MapKit, missing required architecture in i386 file</code> </p>
  
  <p>Ive tried everything from switching to iPhone back to iPad, adding the framework again and nothing is working. I have another small app in which the mapkit works completely fine. I'm just wondering if anyone has seen this error before.</p>