Programmatically Show Call Out on Annotation

- (void)mapView:(MKMapView *)mymapView didAddAnnotationViews:(NSArray *)views
{
    //Show call out
    [mapView selectAnnotation:[[mapView annotations] lastObject] animated:YES];
}

Bring MKAnnotation to Front

- (void)mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views {
    for (MKAnnotationView * annView in views) {
        MapAnnotation* mapAnnotation = (MapAnnotation *)[annView annotation];
        if([mapAnnotation.type isEqualToString:@"Call Out"])
        {
            [[annView superview] bringSubviewToFront:annView];
            break;
        }
    }
}