如何使用Swift代码4使用JSON解码器构建模型和解析

struct Person: Codable {
    let name: String
    let age: Int
}

let jsonString = """
{
    "name": "John",
    "age": 30
}
"""

let jsonData = jsonString.data(using: .utf8)!

do {
    let person = try JSONDecoder().decode(Person.self, from: jsonData)
    print(person.name) // 输出：John
    print(person.age) // 输出：30
} catch {
    print("解码失败：\(error)")
}

struct People: Codable {
    let people: [Person]
}

let jsonPeopleString = """
{
    "people": [
        {
            "name": "John",
            "age": 30
        },
        {
            "name": "Jane",
            "age": 25
        }
    ]
}
"""

let jsonPeopleData = jsonPeopleString.data(using: .utf8)!

do {
    let people = try JSONDecoder().decode(People.self, from: jsonPeopleData)
    for person in people.people {
        print(person.name)
        print(person.age)
    }
} catch {
    print("解码失败：\(error)")
}