小编xio*_*ker的帖子

当我运行npm start或react-native start时,我收到了这个警告:

jest-haste-map: @providesModule naming collision:
  Duplicate module name: core-js
  Paths: {path_to_project}/node_modules/react-native/node_modules/core-js/package.json collides with {path_to_project}/node_modules/react-native/node_modules/fbjs/node_modules/core-js/package.json

This warning is caused by a @providesModule declaration with the same name across two different files.
jest-haste-map: @providesModule naming collision:
  Duplicate module name: base64-js
  Paths: {path_to_project}/node_modules/react-native/node_modules/base64-js/package.json collides with {path_to_project}/node_modules/react-native/node_modules/simple-plist/node_modules/base64-js/package.json

This warning is caused by a @providesModule declaration with the same name across two different files.

这是我的package.json文件

{
  "name": "ProjectName",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": { …

如何从MobX访问组件引用,下面的示例,运行'doSomething'的乐趣是在componentDidMount之后,我得到的不是函数错误,我想弄清楚如何在MobX中访问ref.什么都会欣赏.非常感谢.

@observer
class MyNav extends Component {
    testFun() {
    }
}

@observer
class MyComponent extends Component {
    doSometing() {
        this._myNav.testFun();//this._myNav.testFun() is not a function
    }

    render() {
        return (<MyNav ref={(ref) => this._myNav = ref}/>)
    }
}