Example of zooming to user location in MKMapView when location annotation appears

zoom.m

- (void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views {
    for(MKAnnotationView *annotationView in views) {
        if(annotationView.annotation == mv.userLocation) {
            MKCoordinateRegion region;
            MKCoordinateSpan span;

            span.latitudeDelta=0.05;
            span.longitudeDelta=0.05;

            CLLocationCoordinate2D location=mv.userLocation.coordinate;

            location = mv.userLocation.location.coordinate;

            region.span=span;
            region.center=location;

            [mv setRegion:region animated:TRUE];
            [mv regionThatFits:region];
        }
    }
}