xamarin.forms - CrossMediaManager 在 Xamarin Forms IOS 中播放 mp3 远程文件时抛出 AVAsset loadValuesAsynchronouslyForKeys:completionHandler

Question

我正在尝试使用 CrossMediaManager 播放媒体项目列表。但是，在 IOS 中，它会抛出一个奇怪的错误并且不执行播放，而相同的代码在 Android 中可以工作。如果我确实传递了单个字符串 url 或媒体项目，那么它可以工作，但它不适用于多个 url。

    static async Task<MediaItem> GenerateReciterMediaItem(string fileUri, AudioReciter reciter, byte chapterId)
    {
         Chapter c = await Chapter.GetChapterAsync(chapterId);
         var item = (MediaItem)await CrossMediaManager.Current.Extractor.CreateMediaItem(fileUri);
         item.MediaType = MediaType.Audio;
         var reciterImageUri = Path.Combine("http://www.azee.tech/reciters/r9.png"); //doesn't work
         //another url for image reciter.azee.tech/r9.png --> also doesn't work
         var image = new Image() { Source = ImageSource.FromUri(new Uri(reciterImageUri))};
         int type = 1;
         if (item != null)
         {
            item.Id = string.Format("{0},{1},{2}", type, chapterId, reciter.ReciterID);
            item.IsMetadataExtracted = false;
            item.Title = reciter.Name;
            item.Album = string.Format("{0} - {1} ({2})", c.ChapterID, c.ArabicEnglishName, c.EnglishName);
            item.Artist = reciter.Name;
            item.AlbumImage = image;
            item.AlbumImageUri = reciterImageUri;
            item.DisplayImage = image;
            item.DisplayImageUri = reciterImageUri;
            item.Image = image;
            item.ImageUri = reciterImageUri;
         }
     return item;
 }

static async Task AddAudioReciterTrackToQueue()
{
  //list of urls --> https://www.azee.tech/MaherAlMuaiqly64kbps/001.mp3 , 002.mp3, 003.mp3 and so on
  foreach(var url in listOfUrls)
  {
      var fileUri = listOfUrls[i];
      var item = await GenerateReciterMediaItem(fileUri, type, reciter, chapterId);
      CrossMediaManager.Current.Queue.Add(item);
   }
}
async Task PlayQueue()
{
    CrossMediaManager.Current.AutoPlay = true;
    await AddAudioReciterTrackToQueue();
    
    await CrossMediaManager.Current.Play(CrossMediaManager.Current.Queue.MediaItems); //doesnt work
    await CrossMediaManager.Current.Play(); //doesn't work
}

调试错误

2020-09-15 22:31:43.550896+0100 wQuran.iOS[29476:23403374] -[AVAsset loadValuesAsynchronouslyForKeys:completionHandler:] 使用无法识别的键（专辑名称、作者、标题、艺术家）调用。[0:] state changed Buffering Thread started: #22 2020-09-15 22:31:43.758802+0100 wQuran.iOS[29476:23404151] -[AVAsset loadValuesAsynchronouslyForKeys:completionHandler:] 使用无法识别的键（艺术品）调用。

如果我下载文件并从本地资源播放它。没有错误。我还在 info.plist 中添加了传输安全性以忽略来自该域的 https

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
    <key>www.azee.tech</key>
    <dict>
      <key>NSExceptionRequiresForwardSecrecy</key>
      <false/>
      <key>NSExceptionAllowsInsecureHTTPLoads</key>
      <true/>
      <key>NSIncludesSubdomains</key>
      <true/>
    </dict>
  </dict>
</dict>