$ yarn add redux @tarojs/redux redux-action redux-logger
# 或者使用 npm
$ npm install --save redux @tarojs/redux redux-action redux-logger

// store/index.js

import { createStore, applyMiddleware } from 'redux'

// 引入需要的中间件
import thunkMiddleware from 'redux-thunk'
import { createLogger } from 'redux-logger'

// 引入根reducers
import rootReducer from '../reducers'

const middlewares = [
 thunkMiddleware,
 createLogger()
]

// 创建store
export default function configStore () {
 const store = createStore(rootReducer, applyMiddleware(...middlewares))
 return store
}

import Taro, { Component } from '@tarojs/taro'
import { Provider } from '@tarojs/redux'

import configStore from './store'
import Index from './pages/index'

import './app.scss'

const store = configStore()

class App extends Component {
 ...
 render () {
  return (
   <Provider store={store}>
    <Index />
   </Provider> 
  )
 }
}

// src/constants/todos.js

export const ADD = 'ADD'
export const DELETE = 'DELETE'

// src/reducers/index.js

import { combineReducers } from 'redux'
import { ADD, DELETE } from '../constants/todos'

// 定义初始状态
const INITIAL_STATE = {
 todos: [
  {id: 0, text: '第一条todo'}
 ]
}

function todos (state = INITIAL_STATE, action) {
 // 获取当前todos条数，用以id自增
 let todoNum = state.todos.length
 
 switch (action.type) { 
  // 根据指令处理todos
  case ADD:   
   return {
    ...state,
    todos: state.todos.concat({
     id: todoNum,
     text: action.data
    })
   }
  case DELETE:
   let newTodos = state.todos.filter(item => {
    return item.id !== action.id
   })
   
   return {
    ...state,
    todos: newTodos
   }
  default:
   return state
 }
}

export default combineReducers({
 todos
})

// src/actions/index.js

import { ADD, DELETE } from '../constants/todos'

export const add = (data) => {
 return {
  data,
  type: ADD
 }
}

export const del = (id) => {
 return {
  id,
  type: DELETE
 }
}

// src/pages/index/index.js

import Taro, { Component } from '@tarojs/taro'
import { View, Input, Text } from '@tarojs/components'
import { connect } from '@tarojs/redux'
import './index.scss'

import { add, del } from '../../actions/index'

class Index extends Component {
 config = {
  navigationBarTitleText: '首页'
 }

 constructor () {
  super ()

  this.state = {
   newTodo: ''
  }
 }

 saveNewTodo (e) {
  let { newTodo } = this.state
  if (!e.detail.value || e.detail.value === newTodo) return

  this.setState({
   newTodo: e.detail.value
  })
 }

 addTodo () {
  let { newTodo } = this.state
  let { add } = this.props
  
  if (!newTodo) return

  add(newTodo)
  this.setState({
   newTodo: ''
  })
 }

 delTodo (id) {
  let { del } = this.props
  del(id)
 }

 render () {
  // 获取未经处理的todos并展示
  let { newTodo } = this.state
  let { todos, add, del } = this.props 

  const todosJsx = todos.map(todo => {
   return (
    <View className='todos_item'><Text>{todo.text}</Text><View className='del' onClick={this.delTodo.bind(this, todo.id)}>-</View></View>
   )
  })

  return (
   <View className='index todos'>
    <View className='add_wrap'>
     <Input placeholder="填写新的todo" onBlur={this.saveNewTodo.bind(this)} value={newTodo} />
     <View className='add' onClick={this.addTodo.bind(this)}>+</View>
    </View>
    <View>{ todosJsx }</View> 
   </View>
  )
 }
}

export default connect (({ todos }) => ({
 todos: todos.todos
}), (dispatch) => ({
 add (data) {
  dispatch(add(data))
 },
 del (id) {
  dispatch(del(id))
 }
}))(Index)