Windows Universal(UWP)地理位置API权限

Question

Windows Universal(Windows 10应用程序)中的Geolocation新API提供了一种允许访问用户位置的新方法.

从Windows 10开始,在访问用户的位置之前调用RequestAccessAsync方法.那时,您的应用必须位于前台,并且必须从UI线程调用RequestAccessAsync.

我在UI线程上运行一些非常简单的Geolocation代码,如下所示,但我每次都获得"拒绝"的位置权限,并且没有提示允许位置权限.有没有其他人遇到这个？如何获得在Windows 10应用程序中允许地理位置的位置权限的提示？

地理定位方法

private async Task<ForecastRequest> GetPositionAsync()
    {
        try
        {

            // Request permission to access location
            var accessStatus = await Geolocator.RequestAccessAsync();

            if (accessStatus == GeolocationAccessStatus.Allowed)
            {
                // Get cancellation token
                _cts = new CancellationTokenSource();
                CancellationToken token = _cts.Token;

                // If DesiredAccuracy or DesiredAccuracyInMeters are not set (or value is 0), DesiredAccuracy.Default is used.
                Geolocator geolocator = new Geolocator { DesiredAccuracyInMeters = _desireAccuracyInMetersValue };

                // Carry out the operation
                _pos = await geolocator.GetGeopositionAsync().AsTask(token);

                return new ForecastRequest()
                {
                    Lat = (float)_pos.Coordinate.Point.Position.Latitude,
                    Lon = (float)_pos.Coordinate.Point.Position.Longitude,
                    Unit = Common.Unit.us
                };
            }
            else
                throw new Exception("Problem with location permissions or access");

        }
        catch (TaskCanceledException tce)
        {
            throw new Exception("Task cancelled" + tce.Message);
        }
        finally
        {
            _cts = null;
        }
    }

它被称为:

protected async override void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);

        ForecastViewModel vm = await ForecastViewModel.BuildViewModelAsync(await GetPositionAsync());
        DataContext = vm.Forecast;

        uxForecastList.Visibility = Visibility.Visible;
    }

Answer 1

您必须设置"位置"功能.你可以在appmanifest中做到这一点.

在屏幕截图中,您可以找到设置功能的位置:

在此处查找更多信息:

https://msdn.microsoft.com/en-us/library/windows/apps/windows.devices.geolocation.geolocator.aspx(向下滚动以查找有关功能的信息)