如何获取 YouTube 频道名称？

Question

我在YouTube Documents 中进行了搜索，但没有找到任何可以从 YouTube 视频中获取其他频道名称的内容。

也就是说，

我目前想从video获取频道名称，我只有网址，如何获取频道名称？

Answer 1

您可以从 URL 中提取视频 id，然后发出 HTTP GET 请求：

https://gdata.youtube.com/feeds/api/videos/dQw4w9WgXcQ?v=2&alt=json

其中dQw4w9WgXcQ 是您感兴趣的视频ID。这将返回一个JSON 响应，频道名称位于author 字段中（点击链接查看示例）。

有关详细信息，请参阅 Retrieving Data for a Single Video 和 YouTube API 文档的其余部分。

参见例如How do I find all YouTube video ids in a string using a regex? 了解从 YouTube URL 获取视频 ID 的一些方法。

Answer 2

您可以使用YouTube Data API v3 轻松做到这一点。

URL 中“http://www.youtube.com/watch?v=”之后的最新部分是您的 VIDEO_ID。

只需设置part="sn-p" 即可videos->list。然后你可以在响应中获取snippet.channelId。

请求将是：

GET https://www.googleapis.com/youtube/v3/videos?part=snippet&id=EhNWzcUqGbI&key={YOUR_API_KEY}

你的例子。

您可以随时使用API explorer 尝试这些。

Great sample codes 让您开始。

Answer 3

对于迷路的新手：考虑一个示例函数，该函数将有助于了解获取、解析、显示等的整个周期，并将 youtube 频道的视频专门带到您的 tableview 中。我没有在这里写tableview部分

    -(void)initiateRequestToYoutubeApiAndGetChannelInfo
{
NSString * urlYouCanUseAsSample = @"https://www.googleapis.com/youtube/v3/search?key={YOUR_API_KEY_WITHOUT_CURLY_BRACES}&channelId={CHANNEL_ID_YOU_CAN_GET_FROM_ADDRESS_BAR_WITHOUT_CURLY_BRACES}&part=snippet,id&order=date&maxResults=20";



NSURL *url = [[NSURL alloc] initWithString: urlYouCanUseAsSample];

// Create your request
NSURLRequest *request = [NSURLRequest requestWithURL:url];



  // Send the request asynchronously remember to reload tableview on global thread
[NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

    // Callback, parse the data and check for errors
    if (data && !connectionError) {
        NSError *jsonError;

        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&jsonError];

        if (!jsonError) {
        // better put a breakpoint here to see what is the result and how it is brought to you. Channel id name etc info should be there

            NSLog(@"%@",jsonResult);

        /// separating "items" dictionary and making array

            // 
    id keyValuePairDict = jsonResult;
    NSMutableArray * itemList = keyValuePairDict[@"items"];
            for (int i = 0; i< itemList.count; i++) {


        /// separating VIDEO ID dictionary from items dictionary and string video id
            id v_id0 = itemList[i];
            NSDictionary * vid_id = v_id0[@"id"];
            id v_id = vid_id;
            NSString * video_ID = v_id[@"videoId"];

       //you can fill your local array for video ids at this point

           //     [video_IDS addObject:video_ID];

        /// separating snippet dictionary from itemlist array
            id snippet = itemList[i];
            NSDictionary * snip = snippet[@"snippet"];

        /// separating TITLE and DESCRIPTION from snippet dictionary
            id title = snip;
            NSString * title_For_Video = title[@"title"];
            NSString * desc_For_Video = title[@"description"];

    //you can fill your local array for titles & desc at this point 

              //  [video_titles addObject:title_For_Video];
               // [video_description addObject:desc_For_Video];




        /// separating thumbnail dictionary from snippet dictionary

            id tnail = snip;
            NSDictionary * thumbnail_ = tnail[@"thumbnails"];

        /// separating highresolution url dictionary from thumbnail dictionary

            id highRes = thumbnail_;
            NSDictionary * high_res = highRes[@"high"];

        /// separating HIGH RES THUMBNAIL IMG URL from high res dictionary

            id url_for_tnail = high_res;
            NSString * thumbnail_url = url_for_tnail[@"url"];
   //you can fill your local array for titles & desc at this point

                [video_thumbnail_url addObject:thumbnail_url];


            }
         // reload your tableview on main thread   
    //[self.tableView    performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:NO];
     performSelectorOnMainThread:@selector(reloadInputViews) withObject:nil waitUntilDone:NO];


      // you can log all local arrays for convenience
         //   NSLog(@"%@",video_IDS);
          //  NSLog(@"%@",video_titles);
          //  NSLog(@"%@",video_description);
          //  NSLog(@"%@",video_thumbnail_url);
        }
        else
        {
            NSLog(@"an error occurred");
        }
    }
}];

}