Shared instance of CLLocationManager - ios

Question

I was trying to create simple shared instance of CLLocationManager for my app.
There was no problem creating shared instance:
import UIKit
import CoreLocation
protocol LocationHandlerDelegate: class {
func locationHandlerDidUpdateLocation(location: CLLocation?)
func locationHandlerDidFailWithError(error: NSError)
}
class LocationHandler: NSObject, CLLocationManagerDelegate {
var locationManager: CLLocationManager!
var location: CLLocation?
weak var delegate: LocationHandlerDelegate?
static let sharedInstance = LocationHandler()
override init() {
super.init()
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyKilometer
if CLLocationManager.authorizationStatus() == .NotDetermined {
locationManager.requestWhenInUseAuthorization()
}
}
// MARK: -
// MARK: - CLLocationManagerDelegate functions
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
delegate?.locationHandlerDidUpdateLocation(locations.last)
self.location = locations.last
locationManager.stopUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
delegate?.locationHandlerDidFailWithError(error)
locationManager.stopUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status == .AuthorizedAlways || status == .AuthorizedWhenInUse {
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyKilometer
}
}
}
But for some reason when I call my shared instance from another class:
class TodayViewController: UIViewController, CLLocationManagerDelegate, LocationHandlerDelegate {
super.viewDidLoad() {
LocationHandler.sharedInstance.delegate = self
if #available(iOS 9.0, *) {
LocationHandler.sharedInstance.locationManager.requestLocation()
} else {
LocationHandler.sharedInstance.locationManager.startUpdatingLocation()
}
}
...
// MARK: - LocationHandlerDelegate function
func locationHandlerDidUpdateLocation(location: CLLocation?) {
if let location = location {
print("Current lcoation: \(location)")
}
else {
// ...
}
}
func locationHandlerDidFailWithError(error: NSError) {
print("Error finding lcoation: \(error.localizedDescription)")
}
}
None of CLLocationManagerDelegate functions in my LocationHandler are called.
But if in TodayViewController I write
LocationHandler.sharedInstance.locationManager.delegate = self
instead of
LocationHandler.sharedInstance.delegate = self
and I implement CLLocationManagerDelegate functions in my TodayViewController instead of LocationHandler then those delegate functions are called. So I guess there may be some problem with instancing? Or am I missing something else?