Reactjs :读取单选按钮的值

import React, { Component } from 'react';

class RadioButtons extends Component {
  constructor(props) {
    super(props);
    this.state = {
      selectedValue: '' // 初始化状态变量
    };
  }

  handleRadioChange = (event) => {
    this.setState({
      selectedValue: event.target.value // 更新状态变量的值
    });
  }

  render() {
    return (
      <div>
        <label>
          <input
            type="radio"
            value="option1"
            checked={this.state.selectedValue === 'option1'}
            onChange={this.handleRadioChange}
          />
          Option 1
        </label>
        <label>
          <input
            type="radio"
            value="option2"
            checked={this.state.selectedValue === 'option2'}
            onChange={this.handleRadioChange}
          />
          Option 2
        </label>
        <label>
          <input
            type="radio"
            value="option3"
            checked={this.state.selectedValue === 'option3'}
            onChange={this.handleRadioChange}
          />
          Option 3
        </label>
        <p>Selected value: {this.state.selectedValue}</p> // 显示选中的值
      </div>
    );
  }
}

export default RadioButtons;