Understanding How to Use CLLocationManager

class LocationService:NSObject{
    private let locationManager = CLLocationManager()
    private var tag=""

    override init() {
        super.init()
        locationManager.delegate=self
    }

    Convenience init(tag:String) {
        self.init()
        self.tag = tag
    }

    func startUpdating(){
        print("tag:\(tag)startUpdating")
        locationManager.startUpdatingLocation()
    }

    func stopUpdating(){
        print("tag:\(tag)stopUpdating")
        locationManager.stopUpdatingLocation()
    }

    US>func checkPermison(){
        switchCLLocationManager.authorizationStatus(){
        case.notDetermined:
            print ("notDetermined")
        case.restricted:
            print("restricted")
        case.denied:
            print("denied")
        case.authorizedAlways:
            print("authorizedAlways")
        case.authorizedWhenInUse:
            print("authorizedWhenInUse")
        }
    }
}

extension LocationService:CLLocationManagerDelegate{

    //  This method is called once when you run locationManager.delegate=self.
    funclocationManager(_manager:CLLocationManager, didChangeAuthorization status:CLAuthorizationStatus){
        print("tag:\(tag) didChangeAuthorization->", status.rawValue)
        if status ==.notDetermined {
            locationManager.requestWhenInUseAuthorization()
        }
    }

    funclocationManager(_manager:CLLocationManager, didUpdateLocations:[CLLocation]){
        iflet location = locations.last {
            let latitude=location.coordinate.latitude
            let longitude=location.coordinate.longitude
            let timestamp=location.timestamp.description
            print("tag:\(tag)didUpdateLocations ->latitude:\(latitude)longitude:\(longitude)timestamp:\(timestamp)")
        }
    }

    US>funclocationManager(_manager:CLLocationManager, didFailWithError:Error) {
        print("tag:\(tag) didFailWithError->", error)
    }
}

override init(){
        super.init()
        let locationManager = CLLocationManager()
        locationManager.delegate=self
    }