复杂的Json到Swift Codable

问题描述

尝试将“ JSON响应”“投射”到结构时遇到问题。

我的JSON响应：

{
    "data" =     {
        "answers" =         {
            "10" = "Not";
            "11" = "Not";
        };
        "company" = 1;
        "name" = "Name";
        "profile" =         {
            "email" = "[e-mail]";
            "first_name" = "First name";
            "identity_document" = 12345678;
        };
    };
    "msg_code" = 0;
    "msg_text" = "Success";
}

我的结构：

struct LoginResponse: Codable {
    let answers: Dictionary<String,String>?
    let company: Int?
    let name: String?
    let profile: Profile?
    
    private enum CodingKeys: String,CodingKey{
        case answers = "answers"
        case company = "company"
        case name = "name"
        case profile = "profile"
    }
}

struct Profile: Codable{
    let email: String?
    let first_name: String?
    let identity_document: String?
    
    private enum CodingKeys: String,CodingKey{
        case email = "email"
        case first_name = "first_name"
        case identity_document = "identity_document"
    }
}

我要解码的代码：

Alamofire.request("myURL",method: .post,parameters: parameters,encoding: JSONEncoding.default,headers: nil).responseJSON{
                response in
                switch response.result
                {
                case .success(let json):
                    let login = try! JSONDecoder().decode(LoginResponse.self,from: json as! Data)
                    SVProgressHUD.dismiss()
                case .failure(let error):
                    self.showAlertOk(title:"Alert!",message: "Response Error",handlerOK: { action in print("error")})
                    SVProgressHUD.dismiss()
                }
            }

该行：

let login = try! JSONDecoder().decode(LoginResponse.self,from: json as! Data)

是修复先前版本的结果：

let login = try! JSONDecoder().decode(LoginResponse.self,from: json)

或

let login = try! JSONDecoder().decode(LoginResponse.self,from: json.data(using: .utf8)!)

logcat说，

Could not cast value of type '__NSDictionaryI' (0x7fff87b9d5f0) to 'NSData' (0x7fff87b9c088).

有什么建议吗？我知道我必须改变为！作为字典的数据，但是我没有找到任何示例。

解决方法

两个致命问题：

1. 缺少根对象（具有键data，msg_code和msg_text的字典

   ）

   struct Root: Codable {
       let data : LoginResponse
   }
   

2. 您必须用responseJSON替换responseData才能获取原始数据，responseJSON返回Swift数组或字典。

   Alamofire.request("myURL",method: .post,parameters: parameters,encoding: JSONEncoding.default,headers: nil).responseData {
   
   ...
   
   case .success(let data):
   let login = try! JSONDecoder().decode(Root.self,from: data)
   

请不要try!，catch错误并进行处理。