为稍微不同的json响应创建可编码的公共代码- Swift

Question

如何为稍微不同的json示例创建一个通用的可编码结构，responses.For示例response A和B具有几乎相同的属性，而B有一些额外的属性，称为Designation.Is，可以为此场景创建通用可编码结构吗？

//Response A
{
  "name" : "Jhon",
  "age" : 23,
  "mobile" : "+11012341234",
  .
  .
  .
}

//Response B
{
  "name" : "Jhon",
  "age" : 23,
  "mobile" : "+11012341234",
  .
  .
  .
  "designation": "Manager"
}

Answer 1

您可以使用这样的选项：

struct Response: Decodable {

   var name: String
   var age: Int
   var mobile: String
   var designation: String?

   // If you need to decode, it would look like this:
   init(from decoder: Decoder) throws {

      let container = try decoder.container(keyedBy: CodingKeys.self)

      name = try container.decode(String.self, forKey: .name)
      age = try container.decode(Int.self, forKey: .age)
      mobile = try container.decode(String.self, forKey: .mobile)

      // Decode designation if provided
      if container.contains(.designation){
         designation = try container.decode(String.self, forKey: .designation)
      }
   }
}