import React, { Component } from 'react';

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

  componentDidMount() {
    fetch('https://example.com/api/data')
      .then(response => response.json())
      .then(data => {
        this.setState({
          data: data,
          isLoading: false
        });
      })
      .catch(error => {
        this.setState({
          error: error,
          isLoading: false
        });
      });
  }

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

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

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

    return (
      <div>
        {/* 使用data渲染组件 */}
      </div>
    );
  }
}

export default MyComponent;