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javascript - 在 React 组件之外访问 Redux Store 返回初始值

问题描述

在基于Keftaa/expo-redux-boilerplate样板的 React Redux 应用程序中redux-persist，我们如何从非 React 组件访问持久化的 Redux 存储？

问题：我不确定我们如何访问/导出store返回的，configureStore()因为configureStore()传递了一个setState()函数，更重要的是它存储在Setup组件的状态中而不是导出：

/src/boot/setup.js

export default class Setup extends Component {

    this.state = {
      isLoading: false,
      store: configureStore(() => this.setState({ isLoading: false })),
      isReady: false
    };

    ...


  render() {
    if (!this.state.isReady || this.state.isLoading) {
      return <Expo.AppLoading />;
    }
    return (
        <Provider store={this.state.store}>
          <App />
        </Provider>
    );
  }
}

/src/boot/configureStore.js

import { AsyncStorage } from "react-native";
import devTools from "remote-redux-devtools";
import { createStore, applyMiddleware, compose } from "redux";
import thunk from "redux-thunk";
import { persistStore, persistReducer } from "redux-persist";
import reducer from "../reducers";
import devToolsEnhancer from 'remote-redux-devtools';
import storage from 'redux-persist/lib/storage' // defaults to localStorage for web and AsyncStorage for react-native

const persistConfig = {
  key: 'root',
  storage,
}

const persistedReducer = persistReducer(persistConfig, reducer);

export default function configureStore(onCompletion: () => void): any {
  const enhancer = compose(
    applyMiddleware(thunk),
    devTools({
      name: "MyApp",
      realtime: true
    })
  );

  let store = createStore(persistedReducer, enhancer);
  let persistor = persistStore(store, null, onCompletion);

  return store;
}

尝试失败

返回一个只有它的商店initialValues。我相信这是因为我们正在创建一个新的 redux 商店，而不是从setup.js.

我的/src/lib/utils.js

import configureStore from "../boot/configureStore";

const state = configureStore
console.log(state);  // returns only the initial value for the store

使用

标签： javascriptreactjsreduxreact-reduxredux-persist

解决方案

您可以从组件中导出存储访问器函数Setup，例如：


let store = null;

export function getStore() {
  return store;
}

export default class Setup extends Component {
    constructor(props) {
      super(props);
      store = configureStore(() => this.setState({ isLoading: false })),
      this.state = {
        isLoading: false,
        store,
        isReady: false
      };
}

然后getStore()从其他地方调用并在调用之前检查以确保它不为空store.getState()；

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