Swift 4-使用哪種類型的數組-將JSON響應解析為數組

Question

我正在研究Movie應用程序以進行練習，並且一直堅持將JSON解析為Array。 我將Alamofire用於HTTP請求，並將Unboxer用於將JSON反序列化為Object。

我收到這種形式的JSON響應。

{
  "page": 1,
  "total_results": 19819,
  "total_pages": 991,
  "results": [
    {
      "vote_count": 6303,
      "id": 299536,
      "video": false,
      "vote_average": 8.4,
      "title": "Avengers: Infinity War",
      "popularity": 477.545,
      "poster_path": "/7WsyChQLEftFiDOVTGkv3hFpyyt.jpg",
      "original_language": "en",
      "original_title": "Avengers: Infinity War",
      "genre_ids": [
        12,
        878,
        14,
        28
      ],
      "backdrop_path": "/bOGkgRGdhrBYJSLpXaxhXVstddV.jpg",
      "adult": false,
      "overview": "As the Avengers and their allies have continued to protect the world from threats too large for any one hero to handle, a new danger has emerged from the cosmic shadows: Thanos. A despot of intergalactic infamy, his goal is to collect all six Infinity Stones, artifacts of unimaginable power, and use them to inflict his twisted will on all of reality. Everything the Avengers have fought for has led up to this moment - the fate of Earth and existence itself has never been more uncertain.",
      "release_date": "2018-04-25"
    },
    {
      "vote_count": 485,
      "id": 353081,
      "video": false,
      "vote_average": 7.5,
      "title": "Mission: Impossible - Fallout",
      "popularity": 324.893,
      "poster_path": "/AkJQpZp9WoNdj7pLYSj1L0RcMMN.jpg",
      "original_language": "en",
      "original_title": "Mission: Impossible - Fallout",
      "genre_ids": [
        12,
        28,
        53
      ],
      "backdrop_path": "/5qxePyMYDisLe8rJiBYX8HKEyv2.jpg",
      "adult": false,
      "overview": "When an IMF mission ends badly, the world is faced with dire consequences. As Ethan Hunt takes it upon himself to fulfil his original briefing, the CIA begin to question his loyalty and his motives. The IMF team find themselves in a race against time, hunted by assassins while trying to prevent a global catastrophe.",
      "release_date": "2018-07-25"
    },
    {
      "vote_count": 2408,
      "id": 351286,
      "video": false,
      "vote_average": 6.6,
      "title": "Jurassic World: Fallen Kingdom",
      "popularity": 177.698,
      "poster_path": "/c9XxwwhPHdaImA2f1WEfEsbhaFB.jpg",
      "original_language": "en",
      "original_title": "Jurassic World: Fallen Kingdom",
      "genre_ids": [
        28,
        12,
        878
      ],
      "backdrop_path": "/3s9O5af2xWKWR5JzP2iJZpZeQQg.jpg",
      "adult": false,
      "overview": "Several years after the demise of Jurassic World, a volcanic eruption threatens the remaining dinosaurs on the island of Isla Nublar. Claire Dearing, the former park manager and founder of the Dinosaur Protection Group, recruits Owen Grady to help prevent the extinction of the dinosaurs once again.",
      "release_date": "2018-06-06"
    },
    {
      "vote_count": 1023,
      "id": 363088,
      "video": false,
      "vote_average": 7,
      "title": "Ant-Man and the Wasp",
      "popularity": 146.389,
      "poster_path": "/rv1AWImgx386ULjcf62VYaW8zSt.jpg",
      "original_language": "en",
      "original_title": "Ant-Man and the Wasp",
      "genre_ids": [
        28,
        12,
        14,
        35,
        878
      ],
      "backdrop_path": "/6P3c80EOm7BodndGBUAJHHsHKrp.jpg",
      "adult": false,
      "overview": "As Scott Lang awaits expiration of his term of house detention, Hope van Dyne and Dr. Hank Pym involve him in a scheme to rescue Mrs. van Dyne from the micro-universe into which she has fallen, while two groups of schemers converge on them with intentions of stealing Dr. Pym's inventions.",
      "release_date": "2018-07-04"
    },
    {
      "vote_count": 3693,
      "id": 954,
      "video": false,
      "vote_average": 6.8,
      "title": "Mission: Impossible",
      "popularity": 135.99,
      "poster_path": "/vmj2PzTLC6xJvshpq8SlaYE3gbd.jpg",
      "original_language": "en",
      "original_title": "Mission: Impossible",
      "genre_ids": [
        12,
        28,
        53
      ],
      "backdrop_path": "/tjQHn6xW5BiB1RJ3OZIPDzIOSkF.jpg",
      "adult": false,
      "overview": "When Ethan Hunt, the leader of a crack espionage team whose perilous operation has gone awry with no explanation, discovers that a mole has penetrated the CIA, he's surprised to learn that he's the No. 1 suspect. To clear his name, Hunt now must ferret out the real double agent and, in the process, even the score.",
      "release_date": "1996-05-22"
    },
    {
      "vote_count": 3376,
      "id": 383498,
      "video": false,
      "vote_average": 7.6,
      "title": "Deadpool 2",
      "popularity": 122.498,
      "poster_path": "/to0spRl1CMDvyUbOnbb4fTk3VAd.jpg",
      "original_language": "en",
      "original_title": "Deadpool 2",
      "genre_ids": [
        28,
        35,
        878
      ],
      "backdrop_path": "/3P52oz9HPQWxcwHOwxtyrVV1LKi.jpg",
      "adult": false,
      "overview": "Wisecracking mercenary Deadpool battles the evil and powerful Cable and other bad guys to save a boy's life.",
      "release_date": "2018-05-15"
    },
    {
      "vote_count": 1550,
      "id": 260513,
      "video": false,
      "vote_average": 7.7,
      "title": "Incredibles 2",
      "popularity": 121.637,
      "poster_path": "/x1txcDXkcM65gl7w20PwYSxAYah.jpg",
      "original_language": "en",
      "original_title": "Incredibles 2",
      "genre_ids": [
        28,
        12,
        16,
        10751
      ],
      "backdrop_path": "/mabuNsGJgRuCTuGqjFkWe1xdu19.jpg",
      "adult": false,
      "overview": "Elastigirl springs into action to save the day, while Mr. Incredible faces his greatest challenge yet – taking care of the problems of his three children.",
      "release_date": "2018-06-14"
    },
    {
      "vote_count": 4240,
      "id": 177677,
      "video": false,
      "vote_average": 7.1,
      "title": "Mission: Impossible - Rogue Nation",
      "popularity": 112.192,
      "poster_path": "/z2sJd1OvAGZLxgjBdSnQoLCfn3M.jpg",
      "original_language": "en",
      "original_title": "Mission: Impossible - Rogue Nation",
      "genre_ids": [
        28,
        12,
        53
      ],
      "backdrop_path": "/8XeLfNQrDmFQmPTqxapfWUnKiLf.jpg",
      "adult": false,
      "overview": "Ethan and team take on their most impossible mission yet, eradicating the Syndicate - an International rogue organization as highly skilled as they are, committed to destroying the IMF.",
      "release_date": "2015-07-23"
    },
    {
      "vote_count": 3350,
      "id": 333339,
      "video": false,
      "vote_average": 7.7,
      "title": "Ready Player One",
      "popularity": 109.135,
      "poster_path": "/pU1ULUq8D3iRxl1fdX2lZIzdHuI.jpg",
      "original_language": "en",
      "original_title": "Ready Player One",
      "genre_ids": [
        12,
        878,
        14
      ],
      "backdrop_path": "/5a7lMDn3nAj2ByO0X1fg6BhUphR.jpg",
      "adult": false,
      "overview": "When the creator of a popular video game system dies, a virtual contest is created to compete for his fortune.",
      "release_date": "2018-03-28"
    },
    {
      "vote_count": 5022,
      "id": 56292,
      "video": false,
      "vote_average": 6.9,
      "title": "Mission: Impossible - Ghost Protocol",
      "popularity": 99.389,
      "poster_path": "/s58mMsgIVOFfoXPtwPWJ3hDYpXf.jpg",
      "original_language": "en",
      "original_title": "Mission: Impossible - Ghost Protocol",
      "genre_ids": [
        28,
        53,
        12
      ],
      "backdrop_path": "/pc7a2qrIkIxzqWGqcexd3mHzIxy.jpg",
      "adult": false,
      "overview": "Ethan Hunt and his team are racing against time to track down a dangerous terrorist named Hendricks, who has gained access to Russian nuclear launch codes and is planning a strike on the United States. An attempt to stop him ends in an explosion causing severe destruction to the Kremlin and the IMF to be implicated in the bombing, forcing the President to disavow them. No longer being aided by the government, Ethan and his team chase Hendricks around the globe, although they might still be too late to stop a disaster.",
      "release_date": "2011-12-07"
    }
  ]
 }

一切工作正常，我通過Alamofire請求獲得String類型的JSON響應，但是當我需要將JSON響應解析為數組類型時，問題就開始了。

public class APIManager : NSObject {

    static public func GetPopularMovies(){ // Get all POSTS
        Alamofire.request(APIRouter.GetPopularMovies()).responseJSON { response in
            if let json = response.result.value as? Array<Dictionary<String, Any >>
            {
                var movies : [Movie]
                movies = try! unbox(dictionaries: json)


                print("GetPopularMovies() -> Executed")
                print("JSON: \(json)") // JSON Response

            } else {
                print(response.result.value!)
            }
        }
    }        
}

if statemant始終為false，而且我不知道我應該解析哪種類型的JSON響應。

這是我用來通過Unboxer反序列化JSON的模型。

struct Movie {
    let id : Int
    let original_title : String
    let overview : String
}

extension Movie : Unboxable {
    init(unboxer : Unboxer) throws {
        self.id = try unboxer.unbox(key: "id")
        self.original_title = try unboxer.unbox(key: "original_title")
        self.overview = try unboxer.unbox(key: "overview")
    }

}

struct Genre {
    let id : Int
    let name : String
}

extension Genre : Unboxable {
    init(unboxer : Unboxer) throws {
        self.id = try unboxer.unbox(key: "id")
        self.name = try unboxer.unbox(key: "name")
    }
}

如果您能幫助我解決這個問題，那就太好了，我以前從未遇到過這樣的問題，因為我可能使用的API響應更小，更容易。

非常感謝你們！

Answer 1

我認為您在這一行中使用字典數組進行響應-

 Array<Dictionary<String, Any >>

但是您的json響應是一個包含結果數組的字典。 如果要解析結果數組，則必須僅解析結果，而不是像這樣的完整響應-

if let json = response.result.value as? [String: Any]
        {
let results = json["results"] as? [[String: Any]]
 let movies : [Movie] = try! unbox(dictionaries: results)

 print("GetPopularMovies() -> Executed")
 print("JSON: \(json)") // JSON Response

        } else {
            print(response.result.value!)
        }