react+redux的升级版todoList的实现

const initialState = {
  taskListData: { //任务列表
    loading: false,
    error: false,
    taskList: [],
  }, 
  userData: { //用户信息
    loading: false,
    error: false,
    user: {},
  },
  noticeListData: { //通知列表
    loading: false,
    error: false,
    noticeList: [],
  },
  taskData: { //任务详情，在详情页使用
    loading: false,
    error: false,
    task: {},
  }
};

/*redux/reducers.js*/
import { combineReducers } from 'redux';
import userReducer from '../component/User/indexRedux';
import noticeReducer from '../component/Notice/indexRedux';
import todoListReducer from '../views/TodoList/indexRedux';
import taskReducer from '../views/Detail/indexRedux';

export default combineReducers({
  userData: userReducer,
  noticeListData: noticeReducer, 
  taskListData: todoListReducer,
  taskData: taskReducer,
});

/*views/TodoList/indexRedux.js*/
const taskListData = {
  loading: true,
  error: false,
  taskList: []
};
//不同的action;
const LOAD_TASKLIST = 'LOAD_TASKLIST';
const LOAD_TASKLIST_SUCCESS = 'LOAD_TASKLIST_SUCCESS';
const LOAD_TASKLIST_ERROR = 'LOAD_TASKLIST_ERROR';
const ADD_TASK = 'ADD_TASK';
const UPDATE_TASK = 'UPDATE_TASK';
const DELETE_TASK = 'DELETE_TASK';
function todoListReducer (state = { taskListData }, action) {
  switch(action.type) {
    case LOAD_TASKLIST: {
      return {
        ...state,
        loading: true,
        error: false,
      }
    }
    case LOAD_TASKLIST_SUCCESS: {
      return {
        ...state,
        loading: false,
        error: false,
        taskList: action.payload,
      };
    }
    case LOAD_TASKLIST_ERROR: {
      return {
        ...state,
        loading: false,
        error: true
      };
    }
    case UPDATE_TASK: {
      const index = state.taskList.indexOf(
        state.taskList.find(task => 
          task.id === action.payload.id));
      console.log(index);
      state.taskList[index].status = !state.taskList[index].status;
      return {
        ...state,
        taskList: state.taskList,
      };
    }
    case DELETE_TASK: {
      const index = state.taskList.indexOf(
        state.taskList.find(task => 
          task.id === action.payload.id));
      state.taskList.splice(index, 1);
      return {
        ...state,
        taskList: state.taskList,
      };
    }
    case ADD_TASK: {
      let len = state.taskList.length;
      let index = len > 0 "htmlcode">

/*ListItem/indexRedux.js*/
//处理更新任务状态后和删除任务后的taskList的状态;
const UPDATE_TASK = 'UPDATE_TASK';
const DELETE_TASK = 'DELETE_TASK';
//action creator，更新和删除任务
export function updateTask (task) {
  return dispatch => {
    dispatch({
      type: UPDATE_TASK,
      payload: task,
    });
  }
}
export function deleteTask (task) {
  return dispatch => {
    dispatch({
      type: DELETE_TASK,
      payload: task,
    });
  }
}





三. 如何将redux和组件连接
react-redux提供了connect方法，将state和action creator绑在组件上，然后在组价内部以props的方式获取。下面是TodoList页面的具体实现：


import React, { Component } from 'react';
import { connect } from 'react-redux';
import { bindActionCreators } from 'redux';
import List from '../../component/List';
import { loadTaskList } from '../../component/List/indexRedux';
import { updateTask, deleteTask } from '../../component/ListItem/indexRedux';
import { addTask } from '../../component/SubmitDialog/indexRedux';
class TodoList extends Component {

  render () {
    return (
      <List {...this.props} />
    );
  }
}
export default connect( state => {
  return {
    loading: state.taskListData.loading,
    error: state.taskListData.error,
    taskList: state.taskListData.taskList,
  };
}, dispatch => {
  return {
    loadTaskList: bindActionCreators(loadTaskList, dispatch),
    updateTask: bindActionCreators(updateTask, dispatch),
    deleteTask: bindActionCreators(deleteTask, dispatch),
    addTask: bindActionCreators(addTask, dispatch),
  };
})(TodoList);



connect方法有四个参数，这里主要说下前两个参数：
（1）mapStateToProps：参数为state，返回页面所需要的所有state；
（2）mapDispatchToProps：参数为dispatch，返回页面所要使用的异步回调函数。
眼明手快的你肯定看到了，我们从redux包中导出了bindActionCreators方法，该方法将dispatch和action creator绑定，用来触发action。
四. 异步的action creator如何触发呢？
因为每个action creator都是异步函数，我们传给组件的只是函数的声明，所以就要引入我们的中间件，只用在生成store时加入就行了：


/*redux/configureStore.js*/
import { createStore, applyMiddleware } from 'redux';
import thunk from 'redux-thunk';
import reducers from './reducers';
const initialState = {
  taskListData: {
    loading: false,
    error: false,
    taskList: [],
  }, 
  userData: {
    loading: false,
    error: false,
    user: {},
  },
  noticeListData: {
    loading: false,
    error: false,
    noticeList: [],
  },
  taskData: {
    loading: false,
    error: false,
    task: {},
  }
};
let enhancer = applyMiddleware(thunk);
let store = createStore(
  reducers,
  initialState,
  enhancer,
);
export default store;



在上面的代码中thunk就是一个中间件，我们将引入的中间件传入applyMiddleware就可以了。
五. store在哪里传入组件呢？
我们肯定会想到，store在整个应用中都存在，所以应该在整个应用的最顶层，对于一般项目而言，当然就是最顶端的路由了：


import React, { Component } from 'react';
import { BrowserRouter as Router, Route } from 'react-router-dom';
import { Provider } from 'react-redux';
import BasicLayout from '../layouts';
import store from '../redux/configureStore';
class RouterApp extends Component {
  render () {
    return (
      <Provider store={store}>
        <Router>
          <Route path="/" component={BasicLayout} />
        </Router>
      </Provider>
    );
  }
}
export default RouterApp;





Provider是react-redux的一个组件，作用就是用来将store传入整个应用。
基本要讲的就是这些内容，完整的项目请看 github 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。