CLLocationManager delegate not called ios 11 (swift) - ios

Question

Hey guys I'm new to iOS programming and I have been struggling to figure this out. My locationManager delegate is not being called. Here is my code:
import UIKit;
import MapKit;
class MapViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate{
var mapView: MKMapView!;
let locationManager = CLLocationManager();
override func loadView() {
// Create a map view
mapView = MKMapView();
// Set it as *the* view of this view controller
view = mapView
}
override func viewDidLoad() {
super.viewDidLoad()
print("MapViewController loaded its view.");
mapView.showsUserLocation = true;
let btnImage = UIImage(named: "mapview-track-user.png");
//Tracking button creation code
let trackButton = UIButton(type: UIButtonType.custom) as UIButton;
trackButton.frame = CGRect(x: 10, y: 500, width: 60, height: 60);
trackButton.setImage(btnImage, for: UIControlState.normal);
trackButton.addTarget(self, action: #selector(centerMapOnUserButtonClicked), for: .touchDown);
//Shadow for track user location button
trackButton.layer.shadowColor = UIColor.lightGray.cgColor;
trackButton.layer.shadowOffset = CGSize(width: 0.0, height: 2.0);
trackButton.layer.masksToBounds = false;
trackButton.layer.shadowRadius = 1.0;
trackButton.layer.shadowOpacity = 0.9;
mapView.addSubview(trackButton);
locationManager.delegate = self;
mapView.delegate = self;
locationManager.requestAlwaysAuthorization();
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
if CLLocationManager.locationServicesEnabled() {
print("Location servicese are enabled!");
locationManager.startUpdatingLocation();
locationManager.startUpdatingHeading();
}
else {
print("Location Services not endabled!");
}
}
//Called upon clicking track user button in order to snap map to user
#objc func centerMapOnUserButtonClicked() {
self.mapView.setUserTrackingMode(MKUserTrackingMode.followWithHeading, animated: true);
print("Track button clicked!");
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject]!) {
let location = locations.last as! CLLocation
let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
var region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.1, longitudeDelta: 0.1))
region.center = mapView.userLocation.coordinate;
mapView.setRegion(region, animated: true)
print("*** locationManager Called! ***");
}
}
I am trying to follow various guides online and get familiar with tracking users and eventually displaying other users on the map. Right now I am also slightly confused as to the uses of the CLLocationManager delegate vs. mapView.setUserTrackingMode when it comes to tracking a user in real time.
I have searched all around for a solution but have been completely stumped here. Any help is greatly appreciated.

Answer 1

The map view call will produce temporary permission to location. Whereas the location manager will allow you to specify behavior more rigorously. Please be sure to add the appropriate line to your info.plist. In your case; add the middle entry from below and your location manager should start updating.