title: put image in mapView annotation
body: <p>Suppose I have an image saved on the iPhone, and a class I called <code>MKAnnotationDelegate</code> that implements the <code>MKAnnotation</code> protocol.</p>
  
  <p>I can display annotations on an map view using that class, but can't figure out how to set a callout acccessory and put in an image.</p>
  
  <p>So I've implemented the <code>MKMapiewDelegate</code> protocol to, and gave the class a <code>UIImage</code> property, and defined the </p>
  
  <pre><code>-(MKAnnotationView *) mapView:(MKMapView *)mapView 
              viewForAnnotation:(id&lt;MKAnnotation&gt;)annotation;
  </code></pre>
  
  <p>and I've put in these two lines: </p>
  
  <pre><code>annotationView.canShowCallout = YES;
  
  [(UIImageView *)annotationView.rightCalloutAccessoryView setImage: _image];
  </code></pre>
  
  <p>but still can't figure out what to do to get the image in there .</p>