在react-native中设置环境变量吗? [英] Setting environment variable in react-native?

问题描述

我正在使用react-native来构建跨平台应用程序，但是我不知道如何设置环境变量，以便可以为不同的环境使用不同的常量.

I am using react-native to build a cross-platform app, but I do not know how to set the environment variable so that I can have different constants for different environments.

示例:

development: 
  BASE_URL: '',
  API_KEY: '',
staging: 
  BASE_URL: '',
  API_KEY: '',
production:
  BASE_URL: '',
  API_KEY: '',

推荐答案

我建议您使用十二个因素建议让您的构建过程定义您的 BASE_URL 和 API_KEY .

Instead of hard-coding your app constants and doing a switch on the environment (I'll explain how to do that in a moment), I suggest using the twelve factor suggestion of having your build process define your BASE_URL and your API_KEY.

要回答如何使环境暴露于 react-native ，我建议使用Babel的

To answer how to expose your environment to react-native, I suggest using Babel's babel-plugin-transform-inline-environment-variables.

要使其正常工作，您需要下载插件，然后需要设置 .babelrc ，它的外观应如下所示:

To get this working you need to download the plugin and then you will need to setup a .babelrc and it should look something like this:

{
  "presets": ["react-native"],
  "plugins": [
    "transform-inline-environment-variables"
  ]
}

因此，如果您通过运行 API_KEY = my-app-id react-native捆绑包(或start，run-ios或run-android)来转换您的react-native代码，那么您所拥有的全部要做的就是让您的代码看起来像这样:

And so if you transpile your react-native code by running API_KEY=my-app-id react-native bundle (or start, run-ios, or run-android) then all you have to do is have your code look like this:

const apiKey = process.env['API_KEY'];

然后Babel将其替换为:

And then Babel will replace that with:

const apiKey = 'my-app-id';

希望这会有所帮助！

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