我正在使用
Windows 10 SDK(版本10586)开发Windows移动应用程序,我需要订阅Geolocator的StatusChanged事件.

问题是,当我使用设置>关闭地理定位时位置菜单,我的OnStatusChanged方法未被调用.

    public async Task StartTracking()
    {
        // Request permission to access location
        var accessStatus = await Geolocator.RequestAccessAsync();

        switch (accessStatus)
        {
            case GeolocationAccessStatus.Allowed:
                _geolocator = new Geolocator
                {
                    ReportInterval = 2000,
                    MovementThreshold = 10d,
                    DesiredAccuracyInMeters = 10,
                    DesiredAccuracy = PositionAccuracy.High
                };
                _geolocator.PositionChanged += OnPositionChanged;
                _geolocator.StatusChanged += OnStatusChanged;
                break;

            case GeolocationAccessStatus.Denied:
                Messenger.Default.Send(new GeolocationDeniedAccessMessage(true));
                break;

            case GeolocationAccessStatus.Unspecified:
                Messenger.Default.Send(new GeolocationDeniedAccessMessage(true));
                break;
        }
    }

    private void OnStatusChanged(Geolocator sender, StatusChangedEventArgs e)
    {
        switch (e.Status)
        {
            case PositionStatus.Ready:
                Messenger.Default.Send(new GeolocationAvailabilityMessage(true));
                Messenger.Default.Send(new GeolocationDeniedAccessMessage(false));
                break;

            case PositionStatus.Initializing:
                break;

            case PositionStatus.NoData:
                Messenger.Default.Send(new GeolocationAvailabilityMessage(false));
                break;

            case PositionStatus.Disabled:
                Messenger.Default.Send(new GeolocationDeniedAccessMessage(true));
                break;

            case PositionStatus.NotInitialized:
                break;

            case PositionStatus.NotAvailable:
                Messenger.Default.Send(new GeolocationAvailabilityMessage(false));
                break;
        }
    }

最佳答案 UPDATE

问题似乎是EventHandler的注册.如果在调用StartTracking()时禁用位置,则GeolocationAccessStatus将被“拒绝”,因此一旦用户在设置中打开位置跟踪,EventHandler将永远不会被注册并且OnStatusChanged将不会被调用.
尝试将Geolocator的初始化移出GeolocationAccessStatus.Allowed案例

确保您已在清单package.appxmanifest的功能选项卡中选择了位置.