如何重新渲染获得API数据的React组件？

import React, { Component } from 'react';

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

  componentDidMount() {
    fetch('https://api.example.com/data') // 使用fetch获取API数据
      .then(response => response.json())
      .then(data => {
        this.setState({ data, loading: false }); // 更新组件状态
      });
  }

  fetchData() {
    this.setState({ loading: true }); // 设置加载状态
    fetch('https://api.example.com/data')
      .then(response => response.json())
      .then(data => {
        this.setState({ data, loading: false }); // 更新组件状态
      });
  }

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

    if (loading) {
      return <div>Loading...</div>; // 渲染加载动画
    }

    if (!data) {
      return <div>No data available.</div>; // 渲染无数据提示
    }

    return (
      <div>
        {/* 根据API数据渲染组件内容 */}
        <h1>{data.title}</h1>
        <p>{data.description}</p>
        <button onClick={() => this.fetchData()}>重新获取数据</button>
      </div>
    );
  }
}