ios google+ api youtube订阅一个频道

Question

我正在尝试订阅一个youtube频道的用户。因此，用户登录到一个iOS应用程序，点击订阅，我会订阅一个预定义的频道。因此，我创建了一个应用程序，并启用了YouTube Data v3服务。

经营范围: kGTLAuthScopeYouTube

GTLServiceYouTube *service = self.youTubeService;

GTLYouTubeSubscriptionSnippet* snippet = [GTLYouTubeSubscriptionSnippet object];
snippet.channelId = @"UCGRjJrpD2bmk9Ilq6nq80qg";

GTLYouTubeSubscription* subscription = [GTLYouTubeSubscription object];
subscription.snippet = snippet;

GTLQueryYouTube *query = [GTLQueryYouTube queryForSubscriptionsInsertWithObject:subscription part:@"contentDetails,snippet"];

[service executeQuery:query
                             completionHandler:^(GTLServiceTicket *ticket,
                                                 GTLYouTubeSubscription *subscription,
                                                 NSError *error) {
                                 /* Callback */
                                 NSLog(@"subscription:%@", subscription);
                                 NSLog(@"error:%@", error);

                             }];

服务器返回：

error:Error Domain=com.google.GTLJSONRPCErrorDomain Code=-32500 "The operation couldn’t be completed. (Required)" UserInfo=0x1005d3c20 {error=Required, NSLocalizedFailureReason=(Required), GTLStructuredError=GTLErrorObject 0x10054faa0: {message:"Required" data:[1] code:-32500}}

知道为什么会发生这种事吗？

我正在使用youtube应用程序示例。

https://developers.google.com/youtube/v3/docs/subscriptions/insert#examples上的示例url工作正常，从我可以看出，我正在执行上述objc代码中的相同操作。

POST https://www.googleapis.com/youtube/v3/subscriptions?part=contentDetails%2Csnippet&fields=snippet&key={YOUR_API_KEY}

内容-类型:应用程序/json授权:无记名ya29.AHES6ZQSBniofZhyVX4kfCn0-gVKKeiGayMcQHjTfWxMyffndRus7w X-JavaScript-用户代理: Google资源管理器

{“片段”：{ "resourceId"：{ "channelId"："UCDPM_n1atn2ijUwHd0NNRQw“}}

200 OK

• 隐藏头部-

缓存-控制:无缓存，无存储，最大时长=0，必须重新验证内容-编码: gzip内容-长度: 286内容-类型: application/json；charset=UTF-8日期:2013年6月14日星期五11:28:26 GMT Etag："2vd4g3cVsHAtTjJSdUMaBo1PBVE/Rv5ixqWURoAy7lbp6z3jpkm7IOE“Ex卵: Fri，1990年1月1日00:00 GMT Pragma: no-cache Server: GSE

{
 "snippet": {
  "publishedAt": "2013-06-14T11:28:26.000Z",
  "title": "ColdplayVEVO",
  "description": "",
  "resourceId": {
   "kind": "youtube#channel",
   "channelId": "UCDPM_n1atn2ijUwHd0NNRQw"
  },
  "channelId": "UCQIKfhQEozSerNr3go189mw",
  "thumbnails": {
   "default": {
    "url": "https://i1.ytimg.com/i/DPM_n1atn2ijUwHd0NNRQw/1.jpg?v=c2f0dd"
   },
   "high": {
    "url": "https://i1.ytimg.com/i/DPM_n1atn2ijUwHd0NNRQw/mq1.jpg?v=c2f0dd"
   }
  }
 }
}

更新1已启用loggin -参见youtube.subscriptions.insert下面的详细信息

2013-06-19 08:45:52 +0000
Request: POST https://www.googleapis.com/rpc?prettyPrint=false
Request headers:
  Accept: application/json-rpc
  Authorization: Bearer _snip_
  Cache-Control: no-cache
  Content-Type: application/json-rpc; charset=utf-8
  User-Agent: com.boxonline.tpp.bol.think/1.0 google-api-objc-client/2.0 MacOSX/10.8.3 (gzip)

Request body: (214 bytes)
{
  "jsonrpc" : "2.0",
  "method" : "youtube.subscriptions.insert",
  "id" : "gtl_1",
  "params" : {
    "fields" : "snippet",
    "part" : "contentDetails,snippet",
    "resource" : {
      "snippet" : {
        "channelId" : "UCGRjJrpD2bmk9Ilq6nq80qg"
      }
    }
  },
  "apiVersion" : "v3"
}

Response: status 200
Response headers:
  Cache-Control: no-cache, no-store, max-age=0, must-revalidate
  Content-Encoding: gzip
  Content-Length: 131
  Content-Type: application/json; charset=UTF-8
  Date: Wed, 19 Jun 2013 08:45:52 GMT
  Expires: Fri, 01 Jan 1990 00:00:00 GMT
  Pragma: no-cache
  Server: GSE
  X-Content-Type-Options: nosniff
  X-Frame-Options: SAMEORIGIN
  X-XSS-Protection: 1; mode=block

Response body: (152 bytes)
{
  "error" : {
    "message" : "Required",
    "data" : [
      {
        "reason" : "publisherRequired",
        "message" : "Required",
        "domain" : "youtube.subscription"
      }
    ],
    "code" : -32500
  },
  "id" : "gtl_1"
}

Answer 1

解决办法是取代：

GTLYouTubeSubscriptionSnippet* snippet = [GTLYouTubeSubscriptionSnippet object];
snippet.channelId = @"UCGRjJrpD2bmk9Ilq6nq80qg";

在这方面：

GTLYouTubeSubscriptionSnippet* snippet = [GTLYouTubeSubscriptionSnippet object];
GTLYouTubeResourceId* resourceObject = [GTLYouTubeResourceId object];
resourceObject.channelId = @"UCGRjJrpD2bmk9Ilq6nq80qg";