CODEWITHSUNDEEP
iosobjective-cnullgeolocationcore-location
iProgramIt
iProgramIt

Reputation: 54

Objective-C: Finding User Location (Not on a Map)

I am trying to make my app find a user's location in an address-like form (located after the "Reverse Geocoding" comment). Below is my code:

- (IBAction)getuserlocation:(id) sender{
    //Getting Location
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;

    [locationManager startUpdatingLocation];
    NSLog(address);
}
#pragma mark - CLLocationManagerDelegate

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    NSLog(@"didFailWithError: %@", error);
    UIAlertView *errorAlert = [[UIAlertView alloc]
                               initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [errorAlert show];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"didUpdateToLocation: %@", newLocation);
    CLLocation *currentLocation = newLocation;

    if (currentLocation != nil) {
        longitude = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
        latitude = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
    }

    // Stop Location Manager
    [locationManager stopUpdatingLocation];

    // Reverse Geocoding
    NSLog(@"Resolving the Address");
    [geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *placemarks, NSError *error) {
        NSLog(@"Found placemarks: %@, error: %@", placemarks, error);
        if (error == nil && [placemarks count] > 0) {
            placemark = [placemarks lastObject];
            address = [NSString stringWithFormat:@"%@ %@\n%@ %@\n%@\n%@",
                                 placemark.subThoroughfare, placemark.thoroughfare,
                                 placemark.postalCode, placemark.locality,
                                 placemark.administrativeArea,
                                 placemark.country];
        } else {
            NSLog(@"%@", error.debugDescription);
        }
    } ];

}

My issue is that the compiler only prints out "(null)". (The line where I do this is located in the "getuserlocation" IBAction.) I'm not sure why this is. I've tested the app on an actual iPhone 6 Plus, which unlike the simulator, has access to location services.

If anyone would be able to point out where the error/problem in my code is, causing it to print out null, I would greatly appreciate it. Thanks in advance to all who reply.

***BTW: The following lines are in my viewDidLoad section: locationManager = [[CLLocationManager alloc] init]; geocoder = [[CLGeocoder alloc] init];

Upvotes: 0

Views: 174

Answers (1)

rmaddy
rmaddy

Reputation: 318924

You are logging address long before you get a location and convert it to an address.

Move the NSLog(address); to just after where you actually assign a value to address.

BTW - it should be more like: NSLog(@"Address: %@, address);.

Upvotes: 0

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