react-router-redux 5：跨导航维护存储状态历史记录

Question

我目前正在开发一个 React redux 应用程序。当我在浏览器中使用上一个和下一个按钮导航时，url 正在改变并且路线得到正确呈现。但是，redux store 保持最新状态并且不会在导航中进行时间旅行，唯一改变的状态是路由器位置状态。

这是我的 redux 商店：

import {applyMiddleware, combineReducers, createStore} from "redux";
import reducers from "../reducers";
import history from '../history'
import {routerMiddleware, routerReducer} from "react-router-redux";

const middleware = routerMiddleware(history)

const store = createStore(
  combineReducers({
    ...reducers,
    router: routerReducer
  }),
  applyMiddleware(middleware)
)

export default store

应用的索引文件为：

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import registerServiceWorker from './registerServiceWorker';
import 'semantic-ui-css/semantic.min.css';
import {registerObserver} from "react-perf-devtool";
import {Provider} from "react-redux";
import store from "./store";
import {ConnectedRouter} from "react-router-redux";
import history from './history'

if (module.hot) {
  module.hot.accept()
}

ReactDOM.render(
  <Provider store={store}>
    <ConnectedRouter history={history}>
      <App />
    </ConnectedRouter>
  </Provider>,
  document.getElementById('root')
);
registerObserver();
registerServiceWorker()

历史如下：

import createHistory from 'history/createBrowserHistory'

const history = createHistory()

export default history

最后，这里是减速器：

import {SET_USER_LOCATION, SET_NEARBY_SHOPS} from "../constants/action-types";

const initialState = {
  userLocation: {
    latitude: 0.,
    longitude: 0.
  },
  nearbyShops: {
    shops: [],
    radiusOfSearch: 0.
  }
}

const userLocation = (state = initialState.userLocation, action) => {
  switch (action.type) {
    case SET_USER_LOCATION:
      return { latitude: action.payload.latitude, longitude: action.payload.longitude }
    default:
      return state
  }
}

const nearbyShops = (state = initialState.nearbyShops, action) => {
  switch (action.type) {
    case SET_NEARBY_SHOPS:
      return { shops: [...action.payload.shops], radiusOfSearch: action.payload.radiusOfSearch }
    default:
      return state
  }
}

const reducers = { userLocation, nearbyShops }

export default reducers

我使用推送导航到另一条路线：

const mapDispatchToProps = dispatch => bindActionCreators({
  setNearbyShops: nearbyShops => setNearbyShops(nearbyShops),
  goToNearbyShops: (latitude, longitude, radius) => push(`/nearby/@${latitude},${longitude},${radius}`)
}, dispatch)

我想要的是当我在历史记录中来回导航时同步 userLocation 和 nearbyShops 状态，以便组件以正确的状态而不是最新状态呈现。

这是一张 gif 以进一步解释我要解决的问题：

Answer 1

所以你想让你的 UI 直接依赖于历史状态。不幸的是，这对于 react-router.

的现有 redux 包装器来说相当繁琐

因此，当历史发生变化时，您的 App 组件将收到道具更新。您必须以某种方式将这些新道具转发给应对它们作出反应的组件。你可以例如在您 App 组件的 componentWillReceiveProps 方法中将新信息发送到商店。

或者您可以通过多个组件层将 prop 转发到需要它们的地方，但我不建议这样做。

或者，尝试 https://github.com/mksarge/redux-first-routing，这样更有意义。它使路由独立于组件。另请参阅这篇文章： https://medium.freecodecamp.org/an-introduction-to-the-redux-first-routing-model-98926ebf53cb

无论如何，userLocation 和 nearbyShops 不应该是缩减器，而是选择器，因为它们的信息可以而且应该从您的历史记录中的地理位置得出。

react-router-redux 5：跨导航维护存储状态历史记录

react-router-redux 5: Maintaining store state history across navigation

reactjs

redux

react-redux

react-router-redux

react-router-dom