Redux编辑待办事项

Question

我正在学习Redux。

有人能一步一步地解释如何在这个例子中添加编辑功能吗：https://codepen.io/anon/pen/bxQOaw?editors=0010

我已经添加了action和reducer，但不确定如何在无状态组件上传递它。

操作：

export const editTodo = (text) => {
    const action = {
      type: 'EDIT_TODO'
    }
    console.log('action in editTodo', action);
    return action;
}

减速机：

const todo = (state, action) => {   switch (action.type) {
    case 'EDIT_TODO':
      if (state.id !== action.id) {
        return state;
      }

      return {
        ...state,
        text: action.text
      };
    default:
      return state;   } }; const todos = (state = [], action) => {   switch (action.type) {
    case 'EDIT_TODO':
      return state.map(t =>
        todo(t, action)                
      );

    default:
      return state;   } }

我是否需要将这些无状态组件转换为类？

Answer 1

您应该使用combineReducers将所有的redux reducer收集成一个巨大的redux reducer

import ToDoReducer from './todo-reducer.js';
import OtherReducer from './other-reducer.js';
import {combineReducers} from 'redux';

const allReducers = combineReducers({
    ToDo:ToDoReducer,
    OtherR:OtherReducer,
});

export default allReducers;

然后在根文件中，通过react-rudux提供程序应用组合的redux reducer。

import thunk from 'redux-thunk';
import { Provider } from 'react-redux';

const store = createStore(allReducers, applyMiddleware(thunk));

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

然后，您可以在具有connect和bindActionCreators的组件中使用它们。

import React from 'react';
import { bindActionCreators } from 'redux';
import { connect } from 'react-redux';

import editTodo from './todoFunctions.js';

class myComponent extends React.Component{
   ...
}

let mapStateToProps = (state)=>{return {ToDo:state.ToDo}; };
let matchDispatchToProps = (dispatch)=>{ return bindActionCreators({ editTodo }, dispatch); }
export default connect(mapStateToProps,matchDispatchToProps)(myComponent);