What's the proper way to use startMonitoringSignificantLocationChanges in swift 4? - ios

Question

I try to make a running app, and I want to use the method startMonitoringSignificantLocationChanges, but I'm missing something because is not firing the didUpdateLocations that the documentation says it should.
I have successfully used the startUpdatingLocation method of the CLLocationManager class and I can totally can use it for my interests, but I'd like to understand why my implementation doesn't work.
So, I have this code:
let locationManager = CLLocationManager()
func determineMyCurrentLocation() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.allowsBackgroundLocationUpdates = true
print("authorization Status: \(CLLocationManager.authorizationStatus().rawValue)")
if CLLocationManager.locationServicesEnabled() {
locationManager.startUpdatingLocation() //(1)
//(2)locationManager.startMonitoringSignificantLocationChanges()
locationManager.distanceFilter = 20
//locationManager.start
//locationManager.startUpdatingHeading)(
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { print("yaaay!") }
If you comment (1) and uncomment 2 the func locationManager...etc is never fired.
Also, I have my info.plist with the proper keys set, "Privacy - Location When In Use Usage Description" and "Privacy - Location Always and When In Use Usage Description").
Any idea?
Thanks in advance.
EDITED: My question was imprecise. I put the locationManager property as a class member and I completed the properties in my info.plist

Answer 1

The startMonitoringSignificantLocationChanges requires always authorisation. That also means you should turn on "Background Modes" in Capabilities section and selection "Location Updates". You also require the Privacy - Location Always Usage Description Try these two and you should receive significant location change updates.