React-Redux使用方法

React-Redux使用方法

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理解

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在React项目中使用react-redux,可以让你更方便的使用redux，原理是在index.js中注册app时用一个<Povider>标签嵌套，把你的App.js变Provideer的子组件，将所有的state以props的形式传给<App/>。

代码

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App.js

/*
 * @Author: YooHoeh
 * @Date: 2018-07-17 09:42:21
 * @Last Modified by: YooHoeh
 * @Last Modified time: 2018-07-17 15:11:30
 * @Description:
 */

import React, { Component } from "react";
import { connect } from "react-redux";
import { deletItem, addItem, inputValueChange } from "./store/actionCreator";

const TodoList = props => {
  const { inputValue, handleInputChange, handleClick, handleDelItem } = props;
  return (
    <div>
      <div>
        <input value={inputValue} onChange={handleInputChange} />
        <button onClick={handleClick}>Submit</button>
      </div>
      <ul>
        {props.list.map((item, index) => {
          return (
            <li key={index} onClick={() => handleDelItem(index)}>
              {item}{" "}
            </li>
          );
        })}
      </ul>
    </div>
  );
};

const mapStateToProps = state => {
  return {
    inputValue: state.inputValue,
    list: state.list
  };
};

const mapDispatchToProps = dispatch => {
  return {
    handleInputChange(e) {
      const action = inputValueChange(e.target.value);
      dispatch(action);
    },
    handleClick() {
      const action = addItem();
      dispatch(action);
    },
    handleDelItem(index) {
      const action = deletItem(index);
      dispatch(action);
    }
  };
};

// 导出connect方法将Todolis和store做连接
// 原理是ProVider将state和dispatch以props的方式传给Todolist
// 将UI组件连接成容器组件
export default connect(
  mapStateToProps,
  mapDispatchToProps
)(TodoList);

index.js

/*
 * @Author: YooHoeh
 * @Date: 2018-07-17 09:53:55
 * @Last Modified by: YooHoeh
 * @Last Modified time: 2018-07-17 10:23:50
 * @Description:
 */

import React from "react";
import ReactDOM from "react-dom";
import TodoList from "./TodoList";
import { Provider } from "react-redux";
import store from "./store";

const App = (
  <Provider store={store}>
    {/*这样的话里面的所有组件都可以获取Store里面的state了*/}
    <TodoList />
  </Provider>
);

ReactDOM.render(App, document.getElementById("root"));