小程序中wepyredux的使用以及存储全局变量

1.初始化store

// app.wpyimport { setStore } from 'wepy-redux'import configStore from './store'const store = configStore()setStore(store) //setStore是将store注入到所有页面中

// store文件夹下的index.jsimport { createStore, applyMiddleware } from 'redux'import promiseMiddleware from 'redux-promise'import rootReducer from './reducers'export default function configStore () { const store = createStore(rootReducer, applyMiddleware(promiseMiddleware)) //生成一个 store 对象 return store}

applyMiddleware 函数的作用就是对 store.dispatch 方法进行增强和改造
这里就是使用redux-promise来解决异步

import { getStore } from 'wepy-redux' const store = getStore()// dispatchstore.dispatch({type: 'xx', payload: data}) //xx是reducer名字 payload就是携带的数据store.dispatch(getAllHoomInfo(store.getState().base)) //xx是action名字//获取stateconst state = store.getState()

3.连接组件

@connect({ data:(state) => state.base.data //注意这里是base下的state 所有要加上base.})文件介绍

redux文件

type

types里是触发action的函数名称 只是存储函数名字

按照模块去创建type.js

//base.jsexport const GETALLHOMEINFO = 'GETALLHOMEINFO'

写好了函数名称 在index.js中export出来

export * from './counter'export * from './base'

reducers

随着应用变得复杂，需要对 reducer 函数 进行拆分，拆分后的每一块独立负责管理 state 的一部分
这个时候多个模块的reducer通过combineReducers合并成一个最终的 reducer 函数，

import { combineReducers } from 'redux'import base from './base'import counter from './counter'export default combineReducers({ base, counter})

模块使用handleActions 来处理reducer，将多个相关的reducers写在一起
handleActions有两个参数：第一个是多个reducers，第二个是初始state

GETALLHOMEINFO reducer是将异步action返回的值赋值给data

//base.jsimport { handleActions } from 'redux-actions'import { GETALLHOMEINFO } from '../types/base'const initialState = { data: {}}export default handleActions({ [GETALLHOMEINFO] (state, action) { return { ...state, data: action.payload } }}, initialState)

actions

actions是对数据的处理

在index.js中export出来

export * from './counter'export * from './base'

createAction用来创建Action的

import { GETALLHOMEINFO } from '../types/base'import { createAction } from 'redux-actions'import { Http, Apis } from '../../libs/interface'export const getAllHoomInfo = createAction(GETALLHOMEINFO, (base) => { return new Promise(async resolve => { let data = await Http.get({ url: Apis.ls_url + Apis.allHomeInfo, data: {} }) resolve(data)**//返回到reduer的action.payload** })})用法

import wepy from 'wepy' import { connect } from 'wepy-redux' import { getAllHoomInfo } from '../store/actions/base.js'// 引入action方法 import { getStore } from 'wepy-redux' const store = getStore() @connect({ data:(state) => state.base.data }) export default class Index extends wepy.page { data = { } computed = { } onLoad() { store.dispatch(getAllHoomInfo(store.getState().base)) } }

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