在Swift 4中访问嵌套JSON字符串的成员

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

guard let jsonData = jsonString.data(using: .utf8),
      let jsonObject = try? JSONSerialization.jsonObject(with: jsonData, options: []) else {
    // 处理解析失败的情况
    return
}

guard let jsonDict = jsonObject as? [String: Any] else {
    // 处理类型转换失败的情况
    return
}

if let personDict = jsonDict["person"] as? [String: Any],
   let name = personDict["name"] as? String,
   let age = personDict["age"] as? Int {
    print("Name: \(name)")
    print("Age: \(age)")
}

Name: John
Age: 30