从保存的文件初始化类
在 Objective-C++ 中，我希望我的应用程序能够保存和加载表示某些 C++ 对象存在的文件。例如，用户正在运行应用程序并创建了类 A 的对象 a、b 和 c 、B 和 C。用户点击“保存”来创建一个文件，以某种格式列出这些对象。然后，应用程序应该能够从此文件加载并初始化类 Ax、y 和 z 的新对象code>、B 和 C 通过调用构造函数 A()、B() 和 C()。 （这显然是对流程的极大简化。）
您认为执行此操作的最佳策略是什么？有没有比将文本映射到构造函数或类似的大型 switch 语句更优雅的解决方案？函数指针可以帮助我吗？我可以想象做一些事情，比如让 A、B 和 C 向拥有它们的对象注册自己，并用一个某个地方的关键，但我想知道是否有一些简单的东西我丢失了。
这里的大问题是必须保存数十个类，因此我希望尽可能采用最轻的解决方案。
In Objective-C++, I want my application to be able to save and load files that express the existence of certain C++ objects. For example, a user is running the application and has created objects a, b, and c of classes A, B, and C. The user hits save to create a file that lists these objects in some format. The application should then be able to load from this file and initialize new objects x, y, and z of classes A, B, and C by calling constructors A(), B(), and C(). (This is obviously a heavy simplification of the process.)
What do you think is the best strategy for doing this? Is there any more elegant solution than a big switch statement mapping text to constructors or something along those lines? Would function pointers help me out? I could imagine doing something like having A, B, and C register themselves with the object that owns them, and it stores their constructors with a key somewhere, but I'm wondering if there's something simple that I'm missing.
The big issue here is that there are dozens of classes that must be saved so I want the lightest solution possible.
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继我刚刚对您的帖子发表的评论之后，该文章对 Objective-C 进行了以下说明：
“在 Objective-C 编程语言中，序列化（更常见的称为归档）是通过重写
write:< Object 根类中的 /code> 和read:方法。”我自己只是 Objective-C 的新手，但我熟悉序列化的概念。在这种情况下，通过重写这些方法，您可以使给定类型的对象能够以您指定的格式将自身写入文件，并且还允许它通过从文件中读取其状态来设置其状态。
我相信谷歌会透露很多这方面的教程。
Following up on the comment I just put on your post, that article states the following regarding Objective-C:
"In the Objective-C programming language, serialization (more commonly known as archiving) is achieved by overriding the
write:andread:methods in the Object root class."I'm only new to Objective-C myself, but I'm familiar with the concept of serialization. In this case, by overriding those methods, you are making an object of a given type capable of writing itself to a file in a format you specify, and also you are allowing it to set its state by reading its state from a file.
I'm sure Google will reveal a lot of tutorials on this.