安装

项目根目录下运行指令

npm install babel-plugin-root-import --save-dev

or

yarn add babel-plugin-root-import --dev

完成后修改根目录下的配置文件 .babelrc

{
  "plugins": [
    [
    	"babel-plugin-root-import",
        {
            "rootPathSuffix": "./src",
            "rootPathPrefix": "@/" 
        }
    ]
  ]
}

@ 是 src对应的别名

然后你就能在项目里这样引入文件了

import login from '@/pages/login';

如果有多个路径别名需要配置

"plugins": [
    [
      "babel-plugin-root-import",
      {
        "paths": [
          {
            "rootPathSuffix": "./src/components",
            "rootPathPrefix": "~/"
          },
          {
            "rootPathSuffix": "./src/utils",
            "rootPathPrefix": "!/"
          },
        ]
      }
    ]
  ],

ps:已有项目需要先清理缓存 关闭监听程序

watchman watch-del-all 
react-native start "--reset-cache"

VSCode 配置支持别名路径智能提示

VSCode安装组件 Path Intellisense

再到项目根目录下新建文件jsconfig.json

{
    "compilerOptions": {
        "target": "es6",
        "baseUrl": ".",
        "paths": {
            "@/*": [
                "src/*"
            ]
        }
    },
    "exclude": [
        "node_modules"
    ]
}