title: Size image pin annotation
body: <p>I put the personal image instead of the traditional red pin. When I open the map to display the pin, the image cover the entire map. Is there a maximum size of the pin image or how do I integrate something in the code to fit the size standard classic pin?</p>
  
  <pre><code>func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -&gt; MKAnnotationView? {
      if annotation is MKUserLocation {
          return nil
      }
  
      let annotationIdentifier = "SomeCustomIdentifier" // use something unique that functionally identifies the type of pin
  
      var annotationView: MKAnnotationView! = mapView.dequeueReusableAnnotationViewWithIdentifier(annotationIdentifier)
  
      if annotationView != nil {
          annotationView.annotation = annotation
      } else {
          annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
  
          annotationView.image = UIImage(named: "pin maps.png")
  
          annotationView.canShowCallout = true
          annotationView.calloutOffset = CGPointMake(-8, 0)
  
          annotationView.autoresizesSubviews = true
          annotationView.rightCalloutAccessoryView = UIButton(type: UIButtonType.DetailDisclosure) as UIView
      }
  
      return annotationView
  }
  </code></pre>