如何在Swift中使用带有自定义类型值的可解码协议？

struct MyCustomType: Codable {
    let name: String
    let age: Int
    // 其他属性和方法
}

struct NestedType: Codable {
    let nestedProperty: String
    // 其他属性和方法
}

struct MyCustomType: Codable {
    let name: String
    let age: Int
    let nestedType: NestedType
    // 其他属性和方法
}

let json = """
{
    "name": "John",
    "age": 30,
    "nestedType": {
        "nestedProperty": "Nested Value"
    }
}
""".data(using: .utf8)!

let decoder = JSONDecoder()
do {
    let myCustomType = try decoder.decode(MyCustomType.self, from: json)
    print(myCustomType)
} catch {
    print("解码失败：\(error)")
}

let myCustomType = MyCustomType(name: "John", age: 30, nestedType: NestedType(nestedProperty: "Nested Value"))

let encoder = JSONEncoder()
do {
    let jsonData = try encoder.encode(myCustomType)
    let jsonString = String(data: jsonData, encoding: .utf8)
    print(jsonString ?? "")
} catch {
    print("编码失败：\(error)")
}