I recently had a problem using the CLRegion functionality where if the app was launched while within a Geofence, the didEnterRegion delegate method didn't get called. I created this little method to check for that.

LocationService.m

- (BOOL)insideRegion:(CLRegion *)region location:(CLLocationManager *)manager {
    if([region containsCoordinate:manager.location.coordinate]){
        return true;
    }
    return false;
}