在 Swift 中以正确的方式解码来自 URLSession 的原始数据

Question

我 API 中大多数端点的响应是这样的 -

{
   "status":"success",
   "data":[
      {
         "id":"1",
         "employee_name":"Tiger Nixon",
         "employee_salary":"320800",
         "employee_age":"61",
         "profile_image":""
      },
      {
         "id":"2",
         "employee_name":"Garrett Winters",
         "employee_salary":"170750",
         "employee_age":"63",
         "profile_image":""
      }
   ]
}

这就是我的员工模型的样子

struct Employee: Codable {
    let id, employeeName, employeeSalary, employeeAge: String
    let profileImage: String?

    enum CodingKeys: String, CodingKey {
        case id
        case employeeName = "employee_name"
        case employeeSalary = "employee_salary"
        case employeeAge = "employee_age"
        case profileImage = "profile_image"
    }
}

typealias Employees = [Employee]

我只想使用 JSONDecoder 提取 API 响应的数据部分并将其传递给我的完成处理程序

completionHandler(try? JSONDecoder().decode(Employees.self, from: data), response, nil)

我能够通过创建这样的结构 Employees 来绕过 -

struct Employees: Codable {
    let status: String
    let data: [Employee]
}

但这只是一种解决方法，我必须对几乎所有模型都这样做。那么有没有更好、更少冗余的方式从响应中提取数据呢？

Answer 1

如果我是你，我会做的只是创建一个基于模板的包装器并将其用于所有模型对象。

struct ModelWrapper<T: Codable>: Codable {
    let status: String
    let data: [T]
}
let decoder = JSONDecoder()
let wrapper = try decoder.decode(ModelWrapper<Employee>.self, from: json)

在 Swift 中以正确的方式解码来自 URLSession 的原始数据

Decoding raw data from URLSession the right way in Swift

swift

urlsession

jsondecoder

swift5