How do I test if a CLLocationCoordinate2D is visible in the current MKMapView?

I have many pins on my map and I want to animate the callout for the most visible pin. How开发者_JAVA技巧 can I check to see if the CLLocationCoordinate2D of a pin is visible or closest to the center?

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This might solve ur query

  MKMapPoint userPoint = MKMapPointForCoordinate(_mapView.userLocation.location.coordinate);
    MKMapRect mapRect = _mapView.visibleMapRect;
    BOOL inside = MKMapRectContainsPoint(mapRect, userPoint);