Test Task "Please give me function to relative GPS in iphone."

#import <CoreLocation/CoreLocation.h>

@interface LocationManager () <CLLocationManagerDelegate>
@property (nonatomic, strong) CLLocationManager *locationManager;
@end

@implementation

- (id)init
  self = [super init];
  if (self) {
    [self startLocationManager];
  }
  return self;
}

- (void)startLocationManager {
  locationManager = [[CLLocationManager alloc] init];
  locationManager.delegate = self;
  locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    
  [locationManager startUpdatingLocation];
}

#pragma mark - CLLocationManagerDelegate

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"didUpdateToLocation: %@", newLocation);
    CLLocation *currentLocation = newLocation;
    
    if (currentLocation != nil) {
        longitudeLabel.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
        latitudeLabel.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
    }
} 

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    NSLog(@"didFailWithError: %@", error);
}

@end