如何使用redux- API -middleware在api调用后触发操作

npm install redux-thunk

import { createStore, applyMiddleware } from 'redux';
import thunk from 'redux-thunk';
import rootReducer from './reducers';

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

export const fetchData = () => {
  return (dispatch) => {
    dispatch({ type: 'FETCH_DATA_REQUEST' });

    // 发起异步请求
    fetch('https://api.example.com/data')
      .then(response => response.json())
      .then(data => {
        dispatch({ type: 'FETCH_DATA_SUCCESS', payload: data });
      })
      .catch(error => {
        dispatch({ type: 'FETCH_DATA_FAILURE', payload: error });
      });
  };
};

import React, { useEffect } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import { fetchData } from './actions';

const MyComponent = () => {
  const dispatch = useDispatch();
  const data = useSelector(state => state.data);

  useEffect(() => {
    dispatch(fetchData());
  }, [dispatch]);

  return (
    <div>
      {data.loading && <p>Loading...</p>}
      {data.error && <p>Error: {data.error}</p>}
      {data.items && (
        <ul>
          {data.items.map(item => (
            <li key={item.id}>{item.name}</li>
          ))}
        </ul>
      )}
    </div>
  );
};