如何为异步调用重新呈现react组件？

import React, { Component } from 'react';

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
      data: null,
      loading: true,
      error: null
    };
  }

  componentDidMount() {
    // 异步调用
    fetchData()
      .then(data => {
        // 更新状态
        this.setState({
          data,
          loading: false,
          error: null
        });
      })
      .catch(error => {
        // 更新状态
        this.setState({
          data: null,
          loading: false,
          error: error.message
        });
      });
  }

  render() {
    const { data, loading, error } = this.state;

    if (loading) {
      return <div>Loading...</div>;
    }

    if (error) {
      return <div>Error: {error}</div>;
    }

    return (
      <div>
        {/* 根据数据渲染组件 */}
        {data && <div>{data}</div>}
      </div>
    );
  }
}

// 异步调用函数示例
function fetchData() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('Async data');
    }, 2000);
  });
}

export default MyComponent;