How to use YouTube API V3?

问题:

I'm trying to figure out how to use the new YouTube API (Version 3) in my iOS app but I don't know how to do it. I did many research about it but what I found is all examples and codes for older API so they are not valid. Til now I did understand that for using the new API you have to create a Project in Google Developer Console (and I did it)... but then they send you to a page with some code on it but I really don't understand how to use it. link to google api page What I need to know is how to retrieve some informations from a given URL of a YouTube video, the informations I need are total number of "likes" and total number of "views"... with API 2 it was very simple to do it... but now I really don't know where to begin... Is there someone that please can explain how to achieve this with maybe some examples and some code? I'm pretty sure that a lot of people will benefit from this.

回答1:

You don't have to use the iOS client Google provides to make those kinds of request.

1. Navigate to the API Console and generate a new Simple API Access key for your iOS application. Be sure to enter your app's bundle identifier in the provided window. Alternatively, you can create a Server API key for testing with basic requests and curl from the command line.

2. Find the relevant endpoint for your needs. To find information about a video, you'll want to use the Videos.list method.

First, set up you URL. I will be using this URL as an example: https://www.youtube.com/watch?v=AKiiekaEHhI

You're going to want to specify a value for the part parameter. From your question, it looks like you're going to want to pass in the snippet, contentDetails, and statistics values (although for likes and views, you really only need the statistics value).

Then pass in the id of your video (in this case AKiiekaEHhI, you can add up to 50 comma-separated IDs) and your API key. Your URL should look something like this :

https://www.googleapis.com/youtube/v3/videos?part=contentDetails%2C+snippet%2C+statistics&id=AKiiekaEHhI&key={YOUR_API_KEY}

You can also do this in the API Explorer.

Swift implementation:

// Set up your URL
let youtubeApi = "https://www.googleapis.com/youtube/v3/videos?part=contentDetails%2C+snippet%2C+statistics&id=AKiiekaEHhI&key={YOUR_API_KEY}"
let url = NSURL(string: youtubeApi)

// Create your request
let task = NSURLSession.sharedSession().dataTaskWithURL(url!, completionHandler: { (data, response, error) -> Void in
    do {
        if let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments) as? [String : AnyObject] {

            print("Response from YouTube: \(jsonResult)")
        }
    }
    catch {
        print("json error: \(error)")
    }

})

// Start the request
task.resume()

Objective-C implementation:

(This post has been edited to support NSURLSession. For an implementation that uses NSURLConnection, check the edit history)

// Set up your URL
NSString *youtubeApi = @"https://www.googleapis.com/youtube/v3/videos?part=contentDetails%2C+snippet%2C+statistics&id=AKiiekaEHhI&key={YOUR_API_KEY}";
NSURL *url = [[NSURL alloc] initWithString:youtubeApi];

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

// Send the request asynchronously
[[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, 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) {
            NSLog(@"Response from YouTube: %@", jsonResult);
        }
    }
}] resume];

Your log will look something like this:

Response from YouTube: {
    etag = "\"NO6QTeg0-3ShswIeqLchQ_mzWJs/AAjIATmVK_8ySsAWwEuNfdZdjW4\"";
    items =     (
                {
            contentDetails =             {
                caption = false;
                definition = hd;
                dimension = 2d;
                duration = PT17M30S;
                licensedContent = 1;
            };
            etag = "\"NO6QTeg0-3ShswIeqLchQ_mzWJs/8v8ee5uPZQa1-ucVdjBdAVXzcZk\"";
            id = AKiiekaEHhI;
            kind = "youtube#video";
            snippet =             {
                categoryId = 20;
                channelId = UCkvdZX3SVgfDW8ghtP1L2Ug;
                channelTitle = "Swordless Link";
                description = "Follow me on Twitter! http://twitter.com/swordlesslink\n\nFollow me on TwitchTV for live video game streaming! http://twitch.tv/swordlesslink";
                liveBroadcastContent = none;
                localized =                 {
                    description = "Follow me on Twitter! http://twitter.com/swordlesslink\n\nFollow me on TwitchTV for live video game streaming! http://twitch.tv/swordlesslink";
                    title = "The Legend of Zelda: Majora's Mask With Glitches - Part 17: Going Against the Flow";
                };
                publishedAt = "2015-05-04T10:01:43.000Z";
                thumbnails =                 {
                    default =                     {
                        height = 90;
                        url = "https://i.ytimg.com/vi/AKiiekaEHhI/default.jpg";
                        width = 120;
                    };
                    high =                     {
                        height = 360;
                        url = "https://i.ytimg.com/vi/AKiiekaEHhI/hqdefault.jpg";
                        width = 480;
                    };
                    medium =                     {
                        height = 180;
                        url = "https://i.ytimg.com/vi/AKiiekaEHhI/mqdefault.jpg";
                        width = 320;
                    };
                    standard =                     {
                        height = 480;
                        url = "https://i.ytimg.com/vi/AKiiekaEHhI/sddefault.jpg";
                        width = 640;
                    };
                };
                title = "The Legend of Zelda: Majora's Mask With Glitches - Part 17: Going Against the Flow";
            };
            statistics =             {
                commentCount = 54;
                dislikeCount = 3;
                favoriteCount = 0;
                likeCount = 265;
                viewCount = 6356;
            };
        }
    );
    kind = "youtube#videoListResponse";
    pageInfo =     {
        resultsPerPage = 1;
        totalResults = 1;
    };
} with error: nil

The object for the items key will be an array of info for each video id you passed in to the request.

By digging into this response, you will be able to get the information you need. For example:

if let items = jsonResult["items"] as? [AnyObject]? {
    println(items?[0]["statistics"])
}

Will give you a dictionary of the video's statistics (where you can get the number of likes and the number of views).

{
    commentCount = 54;
    dislikeCount = 3;
    favoriteCount = 0;
    likeCount = 265;
    viewCount = 6356;
}

This same approach can be used with live events.

回答2:

// Swift 3

func search() {


   let videoType = "video you want to search"

    // can use any text


    var dataArray = [[String: AnyObject]]()
    // store videoid , thumbnial , Title , Description

    var apiKey = "_________________"

     // create api key from google developer console for youtube



        var urlString = "https://www.googleapis.com/youtube/v3/search?part=snippet&q=\(videoType)&type=video&videoSyndicated=true&chart=mostPopular&maxResults=10&safeSearch=strict&order=relevance&order=viewCount&type=video&relevanceLanguage=en&regionCode=GB&key=\(apiKey)"



        urlString = urlString.addingPercentEncoding( withAllowedCharacters: .urlQueryAllowed)!
        let targetURL = URL(string: urlString)

        let config = URLSessionConfiguration.default // Session Configuration
        let session = URLSession(configuration: config)

        let task = session.dataTask(with: targetURL!) {

            data, response, error in


            if error != nil {

                print(error!.localizedDescription)


                var alert = UIAlertView(title: "alert", message: "No data.", delegate: nil, cancelButtonTitle: "OK")
                alert.show()



                return

            }

            else {




                do {





                    typealias JSONObject = [String:AnyObject]

                    let  json = try JSONSerialization.jsonObject(with: data!, options: []) as! JSONObject
                    let items  = json["items"] as! Array<JSONObject>



                    for i in 0 ..< items.count {

                        let snippetDictionary = items[i]["snippet"] as! JSONObject
                        print(snippetDictionary)
                        // Initialize a new dictionary and store the data of interest.
                        var youVideoDict = JSONObject()

                        youVideoDict["title"] = snippetDictionary["title"]
                        youVideoDict["channelTitle"] = snippetDictionary["channelTitle"]
                        youVideoDict["thumbnail"] = ((snippetDictionary["thumbnails"] as! JSONObject)["high"] as! JSONObject)["url"]
                        youVideoDict["videoID"] = (items[i]["id"] as! JSONObject)["videoId"]






                        dataArray.append(youVideoDict)


                       print(dataArray)



                        // video like can get by videoID.




                    }


                }

                catch {
                    print("json error: \(error)")
                }

            }
        }
        task.resume()









}

回答3:

Its pretty simple to use. You can use it from javascript, there is a simple module in npmjs: https://www.npmjs.com/package/youtube-api-es6

And, its reference I found on its web: https://www.gyanblog.com/gyan/44-youtube-api-nodejs-usage-example