[iOS] Get current location and city name

myViewController.h

@interface myViewController: UIViewController <CLLocationManagerDelegate>
    CLLocationManager *locationManager;
    CLLocation *currentLocation;
@end

myViewController.m

@implementation AuthViewController
- (void)viewDidLoad
{
    locationManager = [CLLocationManager new];
    locationManager.delegate = self;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [locationManager startUpdatingLocation];
}

#pragma mark CLLocationManager Delegate
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
    currentLocation = [locations objectAtIndex:0];
    [locationManager stopUpdatingLocation];
    NSLog(@"Detected Location : %f, %f", currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
    CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
    [geocoder reverseGeocodeLocation:currentLocation
                   completionHandler:^(NSArray *placemarks, NSError *error) {
                       if (error){
                           NSLog(@"Geocode failed with error: %@", error);
                           return;
                       }
                       CLPlacemark *placemark = [placemarks objectAtIndex:0];
                       NSLog(@"placemark.ISOcountryCode %@",placemark.ISOcountryCode);
                       
                   }];
}
@end

Get current city and country name in swift 3 or later