ios - 可以在 Codable 中使用 NSArray 吗？ (将 "Object Mapper"转换为 "Codable")

Question

我正在尝试将“Object Mapper”转换为“Codable”。我来自服务的响应包括 NSArray，其中包含自定义对象。我需要在 Codable 类中使用 NSArray 和 NSDictionary。但是，我失败了。我尝试使用像 AnyCodable 这样的第三方库，但是，我又失败了。我无法更改服务器端的响应。它必须以 Array 的形式出现。我必须使用数组。您有什么建议或信息吗？

class Person : Codable { //Error 1
  var name: String?
  var data: NSArray?

  private enum CodingKeys : String, CodingKey {
      case name
      case data
  }

  func encode(to encoder: Encoder) throws {
      var container = encoder.container(keyedBy: CodingKeys.self)
      try container.encode(name, forKey: .name)
      try container.encode(data, forKey: .data) //Error 2
  }

  func decode(from decoder: Decoder) throws {
      let container = try decoder.container(keyedBy: CodingKeys.self)
      self.name = try container.decode(String.self, forKey: .name)
      self.data = try container.decode(NSArray.self, forKey: .data) //Error 3
  } 
}

Error 1: "Type 'Person' does not conform to protocol 'Decodable'"

Error 2: "Argument type 'NSArray' does not conform to expected type 'Encodable'"

Error 3: "Instance method 'decode(_:forKey:)' requires that 'NSArray' conform to 'Decodable'"

示例响应在这里。数组中的所有项目都不具有相同的内容。数组中的每一项都有不同的类型。

{
  "data": [
    {
      "languageCode": "EN",
      "deviceInformation": {
        "screenSize": "height:812.0 width:375.0",
        "connectionType": "wifi",
        "deviceType": "iPhone",
        "deviceCode": "D01D304C-D05C-4443-9A92-031C55D14XC7",
        "operatingSystemVersion": "12.2",
        "applicationVersion": "1.0"
      },
      "lastUpdatedParamDate": "13.05.2019 14:44:24",
      "skipOptionalUpdate": 0
    }
  ]
}

Answer 1

当你成功的时候

var data: NSArray?

这是一个桥接目标 - c 类型具有 Any 作为元素的类型，并且 Any 不符合 Codable 因此明确地将其设为类似

var data:[SomeModel]

或者使用 JSONSerialization 代替

---

struct Root: Codable {
    let data: [Model]
}

struct Model: Codable {
    let languageCode: String
    let deviceInformation: DeviceInformation
    let lastUpdatedParamDate: String
    let skipOptionalUpdate: Int
}

struct DeviceInformation: Codable {
    let screenSize, connectionType, deviceType, deviceCode: String
    let operatingSystemVersion, applicationVersion: String
}

---

let eventData = try JSONDecoder().decode(Root.self, from: data) 

if you have more attributes you can add them , if some returns nil in some cases make them optional , but if the type changes then no way with Codable