iOS 应用程序位置权限目前无法正常工作

Question

这是我的通用 ViewController 类，我研究了这个问题 iOS app doesn't ask for location permission ，我已经有了 NSLocationAlwaysUsageDescription 和 NSLocationWhenInUseUsageDescription

@IBOutlet weak var ownMapView: MKMapView!

let locationManager : CLLocationManager = CLLocationManager();


override func viewDidLoad() {
    super.viewDidLoad();

    self.locationManager.delegate = self;
    self.locationManager.requestWhenInUseAuthorization();
    self.locationManager.startUpdatingLocation();
}

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    guard status == .AuthorizedWhenInUse else
    {
        print("Location not using");
        return;
    }

    print("Location using.");
    ownMapView.showsUserLocation = true;
    }

即使我添加了 NSLocationAlwaysUsageDescription 和 NSLocationWhenInUseUsageDescription 这也不适合我。它仅打印“位置未使用”

如何正确请求？

Answer 1

要正确理解这一点，请查看 CLLAuthorizationStatus 文档: https://developer.apple.com/library/ios/documentation/CoreLocation/Reference/CLLocationManager_Class/#//apple_ref/c/tdef/CLAuthorizationStatus

CLAuthorizationStatus 有几个可能的值:

• NotDetermined - 用户尚未做出允许/拒绝使用位置的决定
• 受限 - 应用仅限于使用位置
• 拒绝 - 用户拒绝使用位置。
• AuthorizedAlways - 此应用有权随时启动定位服务。
• AuthorizedWhenInUse - 应用程序被授权在前台运行时启动大多数定位服务

您只检查“AuthorizedWhenInUse”状态，但您首先启动它的状态是 NotDetermined。

您可以进一步查看状态如下:

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {

        if status  == .NotDetermined
        {
            print ("Loction use not determined")
            return
        }
        if status  == .Denied
        {
            print ("Location determined")
            return
        }
        guard status == .AuthorizedWhenInUse else
        {
            print("Location not using");
            return;
        }

        print("Location using.");
        ownMapView.showsUserLocation = true;
    }