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                1.安裝redux ~~~ npm i redux -s 或者 yarn add redux ~~~ ![](https://box.kancloud.cn/16122fe9628b53ae3a6f83ee8d6c268f_800x417.jpg) ~~~ 說明:事件通過定義action將數據傳遞給store,然后store通過使用 store.dispatch(action);傳遞給reducers,然后reducers經過判斷復制一份返回,而其他組件、頁面要向使用數據就要通過以下方法使用:(也就是第3節的action) store.subscribe(this.handleStoreChange); handleStoreChange=()=> { this.setState(store.getState()) } ~~~ ## 1.在store文件下新建一個`index.js`的文件 管理數據 ~~~ //在index.js中(src=>store=>index.js) import {createStore} from 'redux'; import reducer from './reducer'; const store = createStore(reducer); export default store; ~~~ ## 2.創建一個`reducer.js`取存儲數據(相當于倉庫) ~~~ const defaultState={ inputValue:'', list:[] }; /* state指store中的數據 */ export default (state=defaultState,action)=>{ return state; } ~~~ ## 3.在App.js中導入store ~~~ import store from './store'; class App extends Component { constructor(props){ super(props); //getState()可以獲取state中的數據 console.log(store.getState()) this.state = store.getState(); } } ~~~
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