以编程方式快速编写 JSON 文件

im making quiz app and I want to download questions from server in JSON file, parse it and make question object that I will present. I did it so now I want to make an app that will be creating JSON file and upload it to the server, I want to it looks like this

我将从文本字段获取所有信息并将其保存在 JSON 文件中，如下所示（带有顺序值）

    [
{
    "question":"If you want to create a custom class which can be displayed on the view, you can subclass UIView.",
    "answers":["True", "False"],
    "correctIndex":0,
    "module":3,
    "lesson":0,
    "feedback":"Subclassing UIView gives your class the methods and properties of a basic view which can be placed onto the view."
}
 ]

swift 中是否有任何具有我可以使用的功能的框架？ 还是我必须手动制作？如果手动如何保存 JSON 文件？

您可以使用 JSONSerialization 类来实现此目的。请参阅下面在 Playground 中编写的代码片段

import Foundation

// Dictionary containing data as provided in your question.
var dictonary : [String : Any] = ["question":"If you want to create a custom class which can be displayed on the view, you can subclass UIView.",
                                  "answers":["True", "False"],
                                  "correctIndex":0,
                                  "module":3,
                                  "lesson":0,
                                  "feedback":"Subclassing UIView gives your class the methods and properties of a basic view which can be placed onto the view."
                                 ]


if let jsonData = try JSONSerialization.data(withJSONObject: dictonary, options: .init(rawValue: 0)) as? Data
{
    // Check if everything went well
    print(NSString(data: jsonData, encoding: 1)!)

    // Do something cool with the new JSON data
}

如果您在 Xcode Playground 中运行此代码，您可以看到以 JSON 格式打印的数据 获得 JSON 后，您可以使用您选择的网络库将数据发送到服务器。