如何在React最终表单中验证选择框

class FormComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      selectedOption: '',
      error: ''
    };
  }

  handleOptionChange = (event) => {
    this.setState({
      selectedOption: event.target.value
    });
  }

  handleSubmit = () => {
    const { selectedOption } = this.state;

    // 验证选择框是否有值
    if (selectedOption === '') {
      this.setState({
        error: '请选择一个选项'
      });
      return;
    }

    // 其他验证逻辑...

    // 通过验证，执行提交操作
    // ...

    // 清空错误信息
    this.setState({
      error: ''
    });
  }

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

    return (
      <div>
        <label>
          <input
            type="radio"
            value="option1"
            checked={selectedOption === 'option1'}
            onChange={this.handleOptionChange}
          />
          选项1
        </label>
        <label>
          <input
            type="radio"
            value="option2"
            checked={selectedOption === 'option2'}
            onChange={this.handleOptionChange}
          />
          选项2
        </label>
        <button onClick={this.handleSubmit}>提交</button>
        {error && <p>{error}</p>}
      </div>
    );
  }
}