Flutter 是否能够在运行时动态加载和构建小部件? [英] Is Flutter capable of dynamically loading and building widgets during runtime?

问题描述

有什么方法可以让我在某个服务器上存储多个 dart 文件，并在运行时检索其中的任何一个文件，从而使 Flutter 能够从它接收到的文件中构建特定的小部件?

Is there any by which I can store multiple dart files on some server and retrieve any one of those file during run-time in such a way that Flutter is able to build a particular widget from the file it receives?

推荐答案

你不能动态加载 dart 文件或者创建新的类，不行.

You cannot dynamically load dart files or create new classes, no.

另一方面，小部件树是在运行时创建的，小部件本质上是可组合的.所以完全有可能制作一个将一些数据反序列化为小部件树的函数.

On the other hand, the widget tree is created at runtime, and widgets are composable by nature. So it is totally possible to make a function that deserialize some data into a widget tree.

例如，我们可以将一个小部件树编写为 xml/yaml/whatever 之类的:

We could, for example, write a widget tree as an xml/yaml/whatever like so:

type: Row
children:
  - type: Container
    color: red
    child:
      - type: Text
        0: hello world

并有一个函数将其反序列化为:

And have a function deserialize it into:

Row(
  children: [
    Container(
      color: Colors.red,
      child: Text('hello world'),
    ),
  ],
),

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