swift按照维护顺序解析json

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

if let jsonData = jsonString.data(using: .utf8) {
    do {
        let jsonObject = try JSONSerialization.jsonObject(with: jsonData, options: [])
        if let jsonDict = jsonObject as? [String: Any] {
            // 解析成功，可以使用jsonDict进行后续操作
        }
    } catch {
        print("JSON解析失败: \(error)")
    }
}

if let name = jsonDict["name"] as? String {
    print("Name: \(name)")
}

if let age = jsonDict["age"] as? Int {
    print("Age: \(age)")
}

if let city = jsonDict["city"] as? String {
    print("City: \(city)")
}

guard let name = jsonDict["name"] as? String else {
    print("无法获取姓名")
    return
}

guard let age = jsonDict["age"] as? Int else {
    print("无法获取年龄")
    return
}

guard let city = jsonDict["city"] as? String else {
    print("无法获取城市")
    return
}

// 在这里使用name、age和city进行后续操作