Swift 4.可解码+ alamofire

import Foundation
import Alamofire

struct User: Codable {
    let id: Int
    let name: String
    let email: String
}

// 编码示例
let user = User(id: 1, name: "John Doe", email: "john.doe@example.com")
let encoder = JSONEncoder()
if let encodedUser = try? encoder.encode(user) {
    print(encodedUser)
}

// 解码示例
let json = """
{
    "id": 1,
    "name": "John Doe",
    "email": "john.doe@example.com"
}
""".data(using: .utf8)!

let decoder = JSONDecoder()
if let decodedUser = try? decoder.decode(User.self, from: json) {
    print(decodedUser.name)
}

// 使用 Alamofire 发送请求
AF.request("https://api.example.com/users").responseData { response in
    switch response.result {
    case .success(let data):
        do {
            let users = try JSONDecoder().decode([User].self, from: data)
            print(users)
        } catch {
            print("Error decoding JSON: \(error)")
        }
    case .failure(let error):
        print("Error fetching data: \(error)")
    }
}

struct User: Codable {
    let id: Int
    let name: String
    let email: String

    enum CodingKeys: String, CodingKey {
        case id = "user_id"
        case name
        case email
    }

    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        id = try container.decode(Int.self, forKey: .id)
        name = try container.decode(String.self, forKey: .name)
        email = try container.decode(String.self, forKey: .email)
    }
}