在react中检测开发环境-本机.config.js

__DEV__ 在里面 react-native.config.js 因此,我可以在开发和生产环境中管理一些本机库链接,如下面的示例:

const VECTOR_ICONS_FONTS_PATH =
  './node_modules/react-native-vector-icons/Fonts';
const VECTOR_FONTS = ['MaterialCommunityIcons.ttf'];

module.exports = {
  assets: ['./src/assets/fonts/nop/nop.ttf'],
  dependencies: {
    'react-native-vector-icons': {
      platforms: {
        ios: null,
        android: null,
      },
      assets: VECTOR_FONTS.map((font) => VECTOR_ICONS_FONTS_PATH + '/' + font),
    },
    'react-native-flipper': {
      platforms: {
        ios: null,
        android: __DEV__ ? undefined : null,
      },
    },
  },
};

但如果我这样做,我会得到以下错误:

$ react-native run-android
error Unrecognized command "run-android".
info Run "react-native --help" to see a list of all available commands.
error Command failed with exit code 1.