ios - usage - Swift LocationManager didChangeAuthorizationStatus Siempre llamado

location when in use usage description

Question

Tengo un controlador de vista que implementa el CLLocationManagerDelegate . Creo una variable de CLLocationManager:

let locationManager = CLLocationManager()

Luego, en viewDidLoad , establezco las propiedades:

// Set location manager properties
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
locationManager.distanceFilter = 50

El problema es que la función se llama incluso antes de que compruebe el estado de autorización.

func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    if (status == .AuthorizedWhenInUse) {
        // User has granted autorization to location, get location
        locationManager.startUpdatingLocation()
    }
}

¿Puede alguien informarme qué podría estar causando esto?

Answer 1

- locationManager:didChangeAuthorizationStatus: se llama poco después de que se CLLocationManager .

Puede solicitar autorización dentro del método delegado si desea:

func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    switch status {
    case .NotDetermined:
        locationManager.requestAlwaysAuthorization()
        break
    case .AuthorizedWhenInUse:
        locationManager.startUpdatingLocation()
        break
    case .AuthorizedAlways:
        locationManager.startUpdatingLocation()
        break
    case .Restricted:
        // restricted by e.g. parental controls. User can''t enable Location Services
        break
    case .Denied:
        // user denied your app access to Location Services, but can grant access from Settings.app
        break
    default:
        break
    }
}

Tenga en cuenta que debe asignar al delegado en un asunto ''oportuno'' si desea que esto funcione.

Si de alguna manera retrasaría la asignación de delegado, por ejemplo, configurándola de forma asíncrona, podría perder la llamada inicial a - locationManager:didChangeAuthorizationStatus:

Answer 2

Swift 3

func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        switch status {
        case .notDetermined:
            manager.requestAlwaysAuthorization()
            break
        case .authorizedWhenInUse:
            manager.startUpdatingLocation()
            break
        case .authorizedAlways:
            manager.startUpdatingLocation()
            break
        case .restricted:
            // restricted by e.g. parental controls. User can''t enable Location Services
            break
        case .denied:
            // user denied your app access to Location Services, but can grant access from Settings.app
            break
        }
    }