title: Cannot convert value of type '[String : String?]' to expected argument type '[String : AnyObject?]'
body: <p>I'm new on Swift and I followed this tutorial: <a href="http://www.raywenderlich.com/90971/introduction-mapkit-swift-tutorial" rel="noreferrer">http://www.raywenderlich.com/90971/introduction-mapkit-swift-tutorial</a> about MapKit. The problem is that I got an error on this line of code </p>
  
  <pre><code>let placemark = MKPlacemark(coordinate: self.coordinate, addressDictionary: addressDict)
  </code></pre>
  
  <p>The error is described on title. The method which contains this line is:</p>
  
  <pre><code>func mapItem() -&gt; MKMapItem {
      let addressDict = [String(kABPersonAddressStreetKey): self.subtitle]
      let placemark = MKPlacemark(coordinate: self.coordinate, addressDictionary: addressDict)
  
      let mapItem = MKMapItem(placemark: placemark)
      mapItem.name = self.title
  
      return mapItem
  }
  </code></pre>
  
  <p>Please help.</p>