Question

i have an iOS application witch uses the current location of the user. I am doing like this :

-(void)startGeoloc{

    NSLog(@"start geoloc");

    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.desiredAccuracy=kCLLocationAccuracyHundredMeters;
    [locationManager startUpdatingLocation];
}

#pragma mark - CLLocationManagerDelegate methods
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    [locationManager stopUpdatingLocation];
    AppDelegate *apDelegate =(AppDelegate *)[UIApplication sharedApplication].delegate;
    apDelegate.modeGeoloc = YES;
    [self callWebService:locationManager.location];

}

The problem of this, is that my method callWebService:locationManager.location is called twice and i would like to call it just one time. how i can i do this ? thanks for your answers

Answer 1

locationManager delegate methods can be called very frequently (they didUpdateToLocation all the time, right? 🙂

One way would be to have your callWebService have state, know whether it is currently executing a request and ignore concurrent requests if one is still going. Another way would be to keep a timestamp and only allow it through if 2 minutes has passed since the previous one.