iphoneioscllocationmanagermkreversegeocoder

Problem with MKReverseGeocoder


For some reason, I cannot get the name of the city (locality) from my code. Please help!

 - (void)viewDidLoad {
        [super viewDidLoad];


        self.lm = [[CLLocationManager alloc] init];
        lm.delegate = self;
        lm.desiredAccuracy = kCLLocationAccuracyBest;
        lm.distanceFilter = kCLDistanceFilterNone;
        [lm startUpdatingLocation];

    }


      - (void) locationManager:(CLLocationManager *)manager didUpdateToLocation: (CLLocation *) newLocation fromLocation: (CLLocation *)oldLocation {

        if (!geocoder) {
            geocoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate];
            geocoder.delegate = self;
            [geocoder start];
        }

        NSString *lat = [[NSString alloc] initWithFormat:@"%f", newLocation.coordinate.latitude];
        NSString *lng = [[NSString alloc] initWithFormat:@"%f", newLocation.coordinate.longitude];
        NSString *acc = [[NSString alloc] initWithFormat:@"%f", newLocation.horizontalAccuracy];

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:lat message:lng  delegate:self cancelButtonTitle:acc otherButtonTitles: @"button", nil];
        [alert show];
        [alert release];

        [lat, lng, acc release];


    }

    - (void) reverseGeocoder:(MKReverseGeocoder *)geo didFailWithError:(NSError *)error {
            [geocoder release];
            geocoder = nil;

        }



        - (void)reverseGeocoder:(MKReverseGeocoder *)geo didFindPlacemark:(MKPlacemark *)placemark {

             **THIS IS WHERE THE ERROR IS OCCURRING** (REQUEST FOR MEMBER 'LOCALITY' IN SOMETHING NOT A STRUCTURE OR UNION)

            location = [NSString stringWithFormat:@"%@", placemark.locality]; 
            [geocoder release];
            geocoder = nil;
        }

Solution

  • I realize that this is a relatively old question, but ...

    I ran into the exact same issue and resorted to using the addressDictionary placemark attribute, e.g.,

    [placemark.addressDictionary objectForKey@"City"]
    

    instead of

    placemark.subAdministrativeArea
    

    I don't understand why the latter doesn't work either.