通过解析 JSON-SwiftyJSON 创建一个 Class 对象数组

Question

我有一个包含一些变量的类，我想通过使用 SwiftyJSON 解析 JSON 输出来创建该类的对象数组（我是 SwiftyJSON 的新手，因此在创建一个时遇到了一些问题）并显示它们使用表格

谁能帮我创建自定义类对象数组。

我的模型类：

    class RankDetailsModel
    {
        var key:String!
        var currentMonthRank: Int!
        var currentRevenue:Double!
        var lastMonthRank:Int!
        var lastMonthRevenue:Double!

        init?(rank: [String: Any]) {

            guard let key = rank["Key"] as? String,
            let currentMonthRank = rank["CurrentMonthRank"] as? Int,
            let currentRevenue = rank["CurrentRevenue"] as? Int,
            let lastMonthRank = rank["LastMonthRank"] as? String,
            let lastMonthRevenue = rank["LastMonthRevenue"] as? String
                else{
                    return nil
            }

            self.key = key;
        self.currentMonthRank = currentMonthRank;
        self.currentRevenue = Double(currentRevenue);
        self.lastMonthRank = Int(lastMonthRank);
        self.lastMonthRevenue = Double(lastMonthRevenue);
        }
    }

JSON 响应：

{ "AfxRank":
    [{
        "CurrentMonthRank" : 1,
        "Key" : "WSM",
        "CurrentRevenue" : 28834854,
        "LastMonthRevenue": null,
        "LastMonthRank": null
      },
      {
        "CurrentMonthRank" : 2,
        "Key" : "SAM",
        "CurrentRevenue" : 21880000,
        "LastMonthRevenue": null,
        "LastMonthRank": null
      },
      {
        "CurrentMonthRank" : 3,
        "Key" : "CI",
        "CurrentRevenue" : 11380000,
        "LastMonthRevenue": null,
        "LastMonthRank": null
      }]
}

我在 VC 中的代码：

var rankArray : [RankDetailsModel] = []
switch(response.result) {
                case .success(_):
                    if let data = response.result.value{

                        let jsonD = JSON(data) 
                        let dataNew = jsonD.rawString()?.data(using: String.Encoding.utf8) 
                        let jsonFinal = JSON(dataNew)
                        print(jsonFinal["AfxRank"]) //successfully printing the json array as shown above
                        rankArray = jsonFinal["AfxRank"].arrayValue as! [RankDetailsModel] //throwing an error 'RankDetailsModel' is not a subtype of JSON

//can I try something like this. (I didnt use SwifyJson and Alamofire in this case)
//if let userDict = json["AfxRank"] as? [String:Any]
//                        {
//                            guard let userObject = //RankDetailsModel(rank:userDict) else {
//                                print("Failed to create user from //dictionary")
//                                return
//                            }   
                    }
                    break

                case .failure(_):
                    print(response.result.error)
                    break

                }

Answer 1

您的键 AfxRank 包含 Array 而不是字典，因此您需要将其类型转换为 [[String:Any]]，然后通过循环和 append [RankDetailsModel] 数组中的对象。

var rankArray = [RankDetailsModel]()
if let userArray = json["AfxRank"].arrayValue as? [[String:Any]] {
    for dic in userArray {
        if let rankDetailObj = RankDetailsModel(rank: dic) {
            rankArray.append(rankDetailObj)
        }
    }
}