如何在Swift中将字符串转换为JSON

import Foundation

// 定义一个包含字符串的变量
let jsonString = """
{
    "name": "John",
    "age": 30,
    "city": "New York"
}
"""

// 将字符串转换为Data类型
guard let jsonData = jsonString.data(using: .utf8) else {
    print("无法将字符串转换为Data")
    exit(0)
}

do {
    // 将Data类型转换为JSON对象
    let json = try JSONSerialization.jsonObject(with: jsonData, options: [])

    // 检查JSON对象是否为字典类型
    if let dictionary = json as? [String: Any] {
        // 通过键名获取对应的值
        if let name = dictionary["name"] as? String {
            print("姓名：\(name)")
        }
        if let age = dictionary["age"] as? Int {
            print("年龄：\(age)")
        }
        if let city = dictionary["city"] as? String {
            print("城市：\(city)")
        }
    } else {
        print("JSON对象不是字典类型")
    }
} catch {
    print("JSON转换失败：\(error.localizedDescription)")
}