问如何在Swift中解析并返回响应中的所有json数据？

EN

struct LiveScores {
    let result: Bool
    let data: String
    let fixtures: [Fixture]

    struct Fixture : Codable {
        var kickOffTime: String
        var homeTeam: String
        var awayTeam: String
    }

    enum CodingKeys : String, CodingKey {
        case homeTeam = "home_name"
        case awayTeam = "away_name"
        case kickOffTime = "time"
    }
}

    func fetchFixtures() {
    let session = URLSession.shared
    let url = URL(string: "\(baseUrl)fixtures/matches.json?key=\(apiKey)&secret=\(apiSecret)&date=2018-06-01")
    let task = session.dataTask(with: url!) { data, response, err in
        // check for a hard error
        if let error = err {
            NSLog("Live Scores Api Error: \(error)")
        }

        // check the response code
        if let httpResponse = response as? HTTPURLResponse {
            switch httpResponse.statusCode {
            case 200: // perfecto!
                if let fixture = self.fixtureFromJSONData(data!) {
                    NSLog("\(fixture)")
                }
            case 401: // unauthorised
                NSLog("Live Score Api returned an 'unauthorised' response.")
            default:
                NSLog("Live Scores Api returned response: %d %@", httpResponse.statusCode, HTTPURLResponse.localizedString(forStatusCode: httpResponse.statusCode))
            }
        }
    }
    task.resume()
}

{
"success": true,
"data": {
    "fixtures": [
        {
            "date": "2017-10-16",
            "time": "00:30:00",
            "round": "999",
            "home_name": "Santos Laguna",
            "away_name": "Atlas",
            "location": "",
            "league_id": "88"
        },
        {
            "date": "2017-10-16",
            "time": "00:30:00",
            "round": "999",
            "home_name": "O'Higgins",
            "away_name": "Audax Italiano",
            "location": "",
            "league_id": "63"
        },
        {
            "date": "2017-10-16",
            "time": "00:30:00",
            "round": "999",
            "home_name": "Colorado Rapids",
            "away_name": "Real Salt Lake",
            "location": "",
            "league_id": "94"
        }
    ],
    "next_page": "http:\/\/livescore-api.com\/api-client\/fixtures\/matches.json?key=demo_key&secret=demo_secret&page=2",
    "prev_page": false
}

 func fixtureFromJSONData(_ data: Data) -> LiveScores.Fixture? {
    typealias JSONDict = [String:AnyObject]
    let json : JSONDict

    do {
        json = try JSONSerialization.jsonObject(with: data, options: []) as! JSONDict
    } catch {
        NSLog("JSON parsing failed: \(error)")
        return nil
    }

    var jsonData = json["data"] as! [String:Any]
    var fixtureList = jsonData["fixtures"] as! [JSONDict]
    var fixtureDict = fixtureList[0]

    let fixture = LiveScores.Fixture(
                    kickOffTime: fixtureDict["time"] as! String,
                    homeTeam: fixtureDict["home_name"] as! String,
                    awayTeam: fixtureDict["away_name"] as! String
                    )
    return fixture
}