swift - Apple MusicKit 按标识符播放专辑不起作用

Question

我创建了一个按钮，它获取所选专辑的商店 ID 并将其放入音乐播放器的队列中，但由于某种原因，它没有播放并返回以下错误:

Failed to prepareToPlay error: Error Domain=MPMusicPlayerControllerErrorDomain Code=6

这是按钮的代码(我把播放器变量放在那里是为了这里更容易)

var storeIds: [String] = [ "ID" ]
Button(action: {
    let player = MPMusicPlayerController.applicationQueuePlayer
    let queue  = MPMusicPlayerStoreQueueDescriptor(storeIDs: storeIds)
    storeIds = ["\(album.id)".replacingOccurrences(of: "l.", with: "")]
    
    print("ID: ", storeIds) // Example ID:  ["Qn4Bnha"]
    player.setQueue(with: storeIds)
    player.play()
})

此外，我删除了“l”。来自 id，因为每张专辑都以不需要的开头。

Answer 1

如果您尝试播放库中的专辑，那么我也遇到了问题。

据我所知，库歌曲的 MusicItemID 与专辑歌曲不同，播放器无法播放。图书馆相册也是如此。如果我得到图书馆歌曲的 ID 并将另一个请求发送到 - https://api.music.apple.com/v1/me/library/albums/{id}/catalog , 然后将其设置到队列中；它工作正常。

作为解决方法，您可以获取相册的本地 ID，然后向目录发出另一个请求。如果 Apple Music 上有专辑，那应该可以。

这是一个适合我的例子:

do {
  /// First request to get the heavy rotation albums
  guard let url = URL(string: "https://api.music.apple.com/v1/me/history/heavy-rotation") else { return }
  
  let request = MusicDataRequest(urlRequest: URLRequest(url: url))
  let response = try await request.response()
  
  let heavyRotationAlbums = try JSONDecoder().decode(MusicItemCollection<Album>.self, from: response.data)
  
  /// Get the first album
  guard let album = heavyRotationAlbums.first else { return }
  
  /// Get the local album ID
  let albumID = album.id

  /// Another request to get the album from Apple Music Catalog
  guard let catalogURL = URL(string: "https://api.music.apple.com/v1/me/library/albums/\(albumID)/catalog") else { return }

  let catalogRequest = MusicDataRequest(urlRequest: URLRequest(url: catalogURL))
  let catalogResponse = try await catalogRequest.response()

  let albums = try JSONDecoder().decode(MusicItemCollection<Album>.self, from: catalogResponse.data)

  /// Get the same album, but with the catalog ID
  guard let catalogAlbum = albums.first else { return }

  /// Encode the parameters 
  let data = try JSONEncoder().encode(catalogAlbum.playParameters)

  /// Decode the parameters to `MPMusicPlayerPlayParameters`
  let playParameters = try JSONDecoder().decode(MPMusicPlayerPlayParameters.self, from: data)
  
  // Create the queue
  let queue = MPMusicPlayerPlayParametersQueueDescriptor(playParametersQueue: [playParameters])
  
  let player = MPMusicPlayerController.applicationMusicPlayer

  /// Set the queue
  player.setQueue(with: queue)
  try await player.prepareToPlay()

  /// Finally, play the album!
  player.play()
} catch {
  print(error)
}