Zooms out a MKMapView to enclose all its annotations (inc. current location)

Annotations.m

//Original gist : https://gist.github.com/andrewgleave/915374

-(void)MKMapViewFitAnnotations {
    MKMapRect zoomRect = MKMapRectNull;
    for (id <MKAnnotation> annotation in self.mkmapview.annotations) {
        MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
        //MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 0);
        MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0.1, 0.1);
        if (MKMapRectIsNull(zoomRect)) {
            zoomRect = pointRect;
        } else {
            zoomRect = MKMapRectUnion(zoomRect, pointRect);
        }
    }
    //[self.mapView setVisibleMapRect:zoomRect animated:YES];
    [self.mapView setVisibleMapRect:zoomRect edgePadding:UIEdgeInsetsMake(10, 10, 10, 10) animated:YES];
}