来自RSS的Windows 10锁屏幻灯片显示不起作用（RequestSetImageFeedAsync）

Question

我制作了应用程序，其中我使用方法public static IAsyncOperation<SetImageFeedResult> RequestSetImageFeedAsync(Uri syndicationFeedUri)在Windows 8中从外部RSS提要播放锁定屏幕幻灯片。我使用下一个Uri https://urzagatherer.azure-mobile.net/api/wallpapers，它在Windows 8中完美运行（8.1 ）。但是，当我在Windows 10中运行我的应用程序并设置相同的Uri时，锁定屏幕幻灯片显示无法播放。有人能告诉我，问题是什么？ 我使用以下代码：

SetImageFeedResult result = await LockScreen.RequestSetImageFeedAsync(new Uri("https://urzagatherer.azure-mobile.net/api/wallpapers")); 
if (result == SetImageFeedResult.Success) 
{ 
    AddImageFeedScenarioOutputText.Text = "Called RequestSetImageFeedAsync: the specified URL was set as the default."; 
} 
else if (result == SetImageFeedResult.ChangeDisabled) 
{ 
    AddImageFeedScenarioOutputText.Text = "Called RequestSetImageFeedAsync: call succeeded but group policy has the lock screen image slide show turned off."; 
} 
else // (result == SetImageFeedResult.UserCanceled) 
{ 
    AddImageFeedScenarioOutputText.Text = "Called RequestSetImageFeedAsync: the specified URL was not set as the default."; 
}

结果总是等于SetImageFeedResult.Success