更新json模型并保留/转换现有数据- Swift

import Foundation

// 定义JSON模型类
class MyModel {
    var id: Int
    var name: String
    var age: Int
    
    init(id: Int, name: String, age: Int) {
        self.id = id
        self.name = name
        self.age = age
    }
    
    func update(with jsonData: [String: Any]) {
        for (key, value) in jsonData {
            switch key {
            case "id":
                if let newValue = value as? Int {
                    self.id = newValue
                }
            case "name":
                if let newValue = value as? String {
                    self.name = newValue
                }
            case "age":
                if let newValue = value as? Int {
                    self.age = newValue
                }
            default:
                break
            }
        }
    }
}

// 创建现有的JSON模型对象
let existingModel = MyModel(id: 1, name: "John", age: 30)

// 创建新的JSON数据
let newJsonData = """
{
    "id": 2,
    "name": "Alice",
    "age": 25
}
""".data(using: .utf8)!

// 将JSON数据转换为Swift原生数据类型
let jsonObject = try JSONSerialization.jsonObject(with: newJsonData, options: [])

// 确保JSON数据是字典类型
if let jsonData = jsonObject as? [String: Any] {
    existingModel.update(with: jsonData)
}

// 打印更新后的数据
print(existingModel.id)   // 输出: 2
print(existingModel.name) // 输出: Alice
print(existingModel.age)  // 输出: 25