GCKMediaControlChannel 错误处理答案

【问题标题】：GCKMediaControlChannel error handlingGCKMediaControlChannel 错误处理
【发布时间】：2014-06-01 18:13:20
【问题描述】：

在 50% 的情况下，当尝试在 chromecast 设备上流式传输音频/视频时，我会在相同的 BEChromeCastMediaItem 实际开始流式传输之前调用大约 100 次 mediaControlChannel:requestDidFailWithID:error: 方法。

Error Domain=com.google.GCKError Code=4 "The operation couldn’t be completed. (com.google.GCKError error 4.)

（实际上，我在电视上看到“蓝色进度线”的整个过程中，我一直在客户端收到带有此错误的回调）

在这种情况下我们应该怎么做？通常，当您收到有关错误的通知时，您应该处理它（即让用户知道某些事情失败了）并且由您决定是否要重试，但看起来 chrome cast 会为您决定并自动重试直到成功。那么对 iOS 客户端有什么期望呢？我们应该忽略这些电话吗？

更新：错误代码似乎发生了变化（我也收到了1、93），但对于一个媒体项目，它们总是相同的。有人知道在哪里查找错误代码吗？ Class chrome.cast.Error 没有这方面的任何信息。

【问题讨论】：

标签： ios chromecast google-cast

【解决方案1】：

这里有一些说明： https://developers.google.com/cast/docs/reference/ios/g_c_k_error_8h#aea7a716be62f301015e255e1ba63a9cc

您提到的错误代码 4 看起来意味着发出了无效请求。

如果你碰巧是为 iOS 编程，在 GCKError.h 文件中，我发现有一些额外的错误代码：

  typedef NS_ENUM(NSInteger, GCKErrorCode) {

  /**
   * Error code indicating a network I/O error.
   */
  GCKErrorCodeNetworkError = 1,

  /**
   * Error code indicating that an operation has timed out.
   */
  GCKErrorCodeTimeout = 2,

  /**
   * Error code indicating an authentication error.
   */
  GCKErrorCodeDeviceAuthenticationFailure = 3,

  /**
   * Error code indicating that an invalid request was made.
   */
  GCKErrorCodeInvalidRequest = 4,

  /**
   * Error code indicating that an in-progress request has been cancelled, most likely because
   * another action has preempted it.
   */
  GCKErrorCodeCancelled = 5,

  /**
   * Error code indicating that the request was disallowed and could not be completed.
   */
  GCKErrorCodeNotAllowed = 6,

  /**
   * Error code indicating that a requested application could not be found.
   */
  GCKErrorCodeApplicationNotFound = 7,

  /**
   * Error code indicating that a requested application is not currently running.
   */
  GCKErrorCodeApplicationNotRunning = 8,

  /**
   * Error code indicating the app entered the background.
   */
  GCKErrorCodeAppDidEnterBackground = 91,

  /**
   * Error code indicating a disconnection occurred during the request.
   */
  GCKErrorCodeDisconnected = 92,

  /**
   * Error code indicating that a request could not be made because the same type of request is
   * still in process.
   */
  GCKErrorCodeDuplicateRequest = 93,

  /**
   * Error code indicating that a media load failed on the receiver side.
   */
  GCKErrorCodeMediaLoadFailed = 94,

  /**
   * Error code indicating that a media media command failed because of the media player state.
   */
  GCKErrorCodeInvalidMediaPlayerState = 95,

  /**
   * Error code indicating that the application session ID was not valid.
   */
  GCKErrorCodeInvalidApplicationSessionID = 96,

  /**
   * Error code indicating that an unknown, unexpected error has occurred.
   */
  GCKErrorCodeUnknown = 99,
};

【讨论】：