一、react-redux
react-redux依赖于redux工作。 运行安装命令：npm i react-redux：
使用： 将Provider套在入口组件处，并且将自己的store传进去：
import FilmRouter from './FilmRouter/index'
import {Provider} from 'react-redux'
import store from './FilmRouter/views/redux/store';
ReactDOM.render(
<Provider store={store}>
<FilmRouter />
</Provider>
, document.getElementById('root')
);
然后在子组件导出的时候套一层connet组件，并且把父组件需要传入的值传入：
import React, { Component } from 'react'
import FRouter from './Router/ReactRouter'
import Tabbar from './components/Tabbar'
import { connect } from 'react-redux'
// import store from './views/redux/store'
// let unSubscribe
class Index extends Component {
state = {
// list: store.getState().TabbarReducer.list
}
// store.subscribe 订阅
componentDidMount() {
console.log(this.props)
// store.subscribe(() => {
// console.log('订阅', store.getState())
// this.setState({
// isShow: store.getState().TabbarReducer.flag
// })
// })
// unSubscribe = store.subscribe(() => {
// this.setState({
// list: store.getState().TabbarReducer.list
// })
// })
}
// componentWillUnmount() {
// unSubscribe()
// }
render() {
return (
<div>
<FRouter>
{this.props.isShow && <Tabbar></Tabbar>}
</FRouter>
</div>
)
}
}
const mapStateToProps = (state) => {
return {
a: 1,
b: 2,
isShow: state.TabbarReducer.flag
}
}
export default connect(mapStateToProps)(Index)
可以看到我们包了一层connect后把我们的reducer给传入进去，那在子组件中就可以直接使用this.props来获取这个值来决定是否渲染了：
可以看到效果还是跟之前一样，只不过采用了react-redux，那么我们在Detaile组件中就不用自己去分发dispatch事件了，将Details组件修改为：
import React, {useEffect} from 'react'
import { hide, show } from './redux/actionCreator/TabbarActionCreator'
// import store from './redux/store'
import {connect} from 'react-redux'
function Detaill(props) {
console.log(props.match.params.filmId) // 第一种方式路由获取参数
// console.log(props.location.query.filmId) // 第二种方式路由获取参数
// console.log(props.location.state.filmId) // 第三种方式路由获取参数
let {show, hide} = props
useEffect(() => {
console.log('创建')
// store.dispatch(hide())
hide()
return () => {
console.log('销毁')
// store.dispatch(show())
show()
}
},[show,hide])
return (
<div>Detaill</div>
)
}
const mapDispatchToProps = {
show,
hide
}
// connect接收两个参数，第一个是属性，第二个是回调函数
export default connect(null, mapDispatchToProps)(Detaill);
可以看到这里都不需要我们去dispatch分发了，直接使用connect传入到之前TabbarReducer写好的类型以在子组件中以函数的形式去调用：
二、redux持久化
npm i redux-persist
修改store.js代码：
import { applyMiddleware, combineReducers, createStore, compose } from "redux";
import TabbarReducer from "./reducers/TabbarReducer";
import reduxThunk from "redux-thunk"
import reduxPromise from "redux-promise"
import { persistStore, persistReducer } from 'redux-persist'
import storage from 'redux-persist/lib/storage' // defaults to localStorage for web
const persistConfig = {
key: 'TabbarReducer',
storage,
// blacklist: ['TabbarReducer'] // navigation will not be persisted 黑名单
whitelist: ['TabbarReducer'] // only navigation will be persisted 白名单
}
const reducer = combineReducers({
TabbarReducer
})
const persistedReducer = persistReducer(persistConfig, reducer)
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
const store = createStore(persistedReducer, /* preloadedState, */ composeEnhancers(
applyMiddleware(reduxThunk, reduxPromise)
));
let persistor = persistStore(store)
export {store, persistor};
然后在根组件中修改：
import FilmRouter from './FilmRouter/index'
import {Provider} from 'react-redux'
import {store, persistor} from './FilmRouter/views/redux/store';
import { PersistGate } from 'redux-persist/integration/react';
ReactDOM.render(
<Provider store={store}>
<PersistGate loading={null} persistor={persistor}>
<FilmRouter />
</PersistGate>
</Provider>
, document.getElementById('root')
);
效果：
以上就是react redux及redux持久化示例详解的详细内容，更多关于react redux持久化的资料请关注阿兔在线工具其它相关文章！
