选择 "While using an app" 时 CLLocationManager 不起作用

Question

当我启动我的应用程序时，CLLocationManager 不工作我收到拒绝跟踪位置的警告或仅在使用应用程序时或始终收到。如果我点击 "only while using an app"，我的位置没有定义。知道为什么它不起作用吗？

我的代码：

// Used to start getting the users location
let locationManager = CLLocationManager()

func fetchCityAndCountry(location: CLLocation, completion: @escaping (_ city: String?, _ isoCode:  String?, _ error: Error?) -> ()) {
    CLGeocoder().reverseGeocodeLocation(location) { placemarks, error in
        completion(placemarks?.first?.locality,
                   placemarks?.first?.isoCountryCode,
                   error)
    }
}

// Print out the location to the console
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    if let location = locations.first {
        let location = CLLocation(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
        //let location = CLLocation(latitude: 48.856614, longitude: 2.3522219)

        fetchCityAndCountry(location: location) {
            city, isoCode, error in guard let city = city, let isoCode = isoCode, error == nil else { return }
            //OTHER CODE
            } else {
                //OTHER CODE
            }
        }
    }
}

// If we have been deined access give the user the option to change it
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
    if(status == CLAuthorizationStatus.denied) {
            showLocationDisabledPopUp()
        } else {
            //OTHER CODE
        }
    }
}

// Show the popup to the user if we have been deined access
func showLocationDisabledPopUp() {
    let alertController = UIAlertController(title: "\(self.localizedString(forKey: "locationAlertTitle"))",
                                            message: "\(self.localizedString(forKey: "locationAlertmsg"))",
                                            preferredStyle: .alert)
    let cancelAction = UIAlertAction(title: "\(self.localizedString(forKey: "continue"))", style: .default, handler: nil)
    alertController.addAction(cancelAction)
    let openAction = UIAlertAction(title: "\(self.localizedString(forKey: "locationAlertOk"))", style: .cancel) { (action) in
        if let url = URL(string: UIApplicationOpenSettingsURLString) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        }
    }
    alertController.addAction(openAction)
    self.present(alertController, animated: true, completion: nil)
}

谢谢！

Answer 1

检查一下并确保您没有遗漏任何东西：

let locationManager = CLLocationManager()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.delegate = self
locationManager.startUpdatingLocation()

您也可以拨打 requestLocation 以便能够：

Request one-time delivery of the user’s current location.

locationManager.requestLocation()

Answer 2

您的错误发生是因为您没有要求应用程序获取位置并且您的 locations: [CLLocation] 是空的。您需要调用此函数：

func getLocation(){
    locationManager=CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()
}

另外，在您的 locationManager 中，您需要使用 locationManager.stopUpdatingLocation() 以便在不需要时停止持续更新位置。

选择 "While using an app" 时 CLLocationManager 不起作用

CLLocationManager doesn't work when choosing "While using an app"

xcode

core-location

cllocationmanager

swift

swift3