Not getting Address from latitude and longitude

Question

I am using following code for get address from current latitude and longitude, But I am not able to get proper response

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

    current_latitude=newLocation.coordinate.latitude;
    current_longitude=newLocation.coordinate.longitude;

    CLGeocoder * geoCoder = [[CLGeocoder alloc] init];

    [geoCoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) {
        if(placemarks && placemarks.count > 0)
        {
            CLPlacemark *placemark= [placemarks objectAtIndex:0];

            NSString * address = [NSString stringWithFormat:@"%@ %@,%@ %@", [placemark subThoroughfare],[placemark thoroughfare],[placemark locality], [placemark administrativeArea]];

            UIAlertView *art = [[UIAlertView alloc] initWithTitle:address message:nil delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [art show];
            [art release];
            NSLog(@"%@",address);
        }
    }];
}

Answer 1

CLLocation has poor coverage at the moment; see this document . It's possible you're trying to geocode a location from a poorly covered area.

If that's the case, there are other geocoders, such as Google's Geocoder (which requires you to display the results on a map).