title: MKMapView annotation is not selectable second time
body: <p>On my iPad app I am using iOS map to display few points using annotation. I want to display custom callout too when an annotation is been selected. I am using UIPopoverController to show callout. However this works only when first time tap on annotation. If I want to see the callout on same annotation, I have to select different annotation first and then tap on previous annotation. </p>
  
  <p>Basically this delegate method is not firing second time.</p>
  
  <pre><code>-(void)mapView:(MKMapView *)mapView 
      didSelectAnnotationView:(MKAnnotationView *)view
  </code></pre>
  
  <p>I am using storyboard and delegate is set on there. This is how I set the annotations. </p>
  
  <pre><code>[self.mapView addAnnotations:self.placemarksArray] 
  </code></pre>
  
  <p>Can anyone please let me know the reason for above issue?
  Thanks</p>