Windows 通用 (UWP) 地理定位 API 权限

Question

Windows 通用地理定位（Windows 10 个应用程序）的新 API 提供了一种允许访问用户位置的新方法。

Starting in Windows 10, call the RequestAccessAsync method before accessing the user’s location. At that time, your app must be in the foreground and RequestAccessAsync must be called from the UI thread.

我在 UI 线程上运行为地理定位编写了一些非常简单的代码，如下所示，但我每次都获得位置权限 "denied" 并且没有提示允许位置权限。还有其他人运行参与其中吗？ 如何在 Windows 10 应用程序中获得允许地理位置权限的提示？

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;
        }
    }

在哪里叫：

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 "Location" 能力。您可以在应用程序清单中执行此操作。

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）

Windows 通用 (UWP) 地理定位 API 权限

Windows Universal (UWP) Geolocation API Permissions

c#

xaml

geolocation

win-universal-app

uwp