在react中修改来自另一个reducer的状态

npm install redux react-redux

// reducer.js
const initialState = {
  // 初始状态
  data: ''
};

const reducer = (state = initialState, action) => {
  switch (action.type) {
    case 'UPDATE_DATA':
      return {
        ...state,
        data: action.payload // 修改来自另一个reducer的状态
      };
    default:
      return state;
  }
};

export default reducer;

// store.js
import { createStore } from 'redux';
import reducer from './reducer';

const store = createStore(reducer);

export default store;

// MyComponent.js
import React from 'react';
import { connect } from 'react-redux';

const MyComponent = (props) => {
  const { data, updateData } = props;

  const handleClick = () => {
    // 修改来自另一个reducer的状态
    updateData('New Data');
  };

  return (
    <div>
      <p>Data: {data}</p>
      <button onClick={handleClick}>Update Data</button>
    </div>
  );
};

const mapStateToProps = (state) => {
  return {
    data: state.data // 访问来自另一个reducer的状态
  };
};

const mapDispatchToProps = (dispatch) => {
  return {
    updateData: (newData) => dispatch({ type: 'UPDATE_DATA', payload: newData }) // 修改来自另一个reducer的状态
  };
};

export default connect(mapStateToProps, mapDispatchToProps)(MyComponent);