CLLocationManager AuthorizationStatus callback?

You can use the
locationManager:didChangeAuthorizationStatus: CLLocationManagerDelegate method as a “callback” of sorts.

- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
    if (status == kCLAuthorizationStatusDenied) {
        // The user denied authorization
    }
    else if (status == kCLAuthorizationStatusAuthorized) {
        // The user accepted authorization
    }
}

And in Swift (update suggested by user Michael Marvick, but rejected for some reason…):

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    if (status == CLAuthorizationStatus.denied) {
        // The user denied authorization
    } else if (status == CLAuthorizationStatus.authorizedAlways) {
        // The user accepted authorization
    } 
}