如何在 Reactjs 中获取单选按钮（react-radio-buttons）的值？

Question

如何获取单选按钮的值，如果我在 RadioGroup 中调用 updateRadioButton 会导致错误。我需要使用（react-radio-buttons）在控制台中打印为男性或女性。单选按钮打印正确，但我无法获得值。提前谢谢你。

 class CreateUserComponent extends React.Component {
        constructor(props) {
        super(props); 
        this.state={radio:''}
    }

    updateRadioButton(e) {
        this.setState({ radio: e.target.value });
    }

    <RadioGroup horizontal>
            <RadioButton value="Male">Male</RadioButton>
            <RadioButton value="Female">Female</RadioButton>
        </RadioGroup>

Answer 1

根据这个库的DOCS，RadioGroup 有一个 onChange 属性处理程序，你可以传递它，它将返回选定的值，然后你可以将它设置为状态或传递它。

这是您的代码的小型运行示例：

debugger
const RadioGroup = ReactRadioButtonsGroup.ReactRadioButtonsGroup;
const RadioButton = ReactRadioButtonsGroup.ReactRadioButton;

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {};
  }

  onRadiochange = value => {
    console.log(value);
  };

  render() {
    return (
      <div>
        <RadioGroup horizontal onChange={this.onRadiochange}>
          <RadioButton value="Male">Male</RadioButton>
          <RadioButton value="Female">Female</RadioButton>
        </RadioGroup>
      </div>
    );
  }
}

ReactDOM.render(<App />, document.getElementById("root"));

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/react-radio-buttons-group@1.0.2/build/bundle.min.js"></script>
<div id="root"></div>

Answer 2

来自this react-radio-buttons example：

class CreateUserComponent extends React.Component {
  ... 
  updateRadioButton(value) {
    this.setState({ radio: value });
  }

  render() {
    ...

    return (
      <RadioGroup horizontal onChange={this.updateRadioButton} >
        <RadioButton value="Male">Male</RadioButton>
        <RadioButton value="Female">Female</RadioButton>
      </RadioGroup>
    )
    ...
  }
}

Answer 3

将 onChange 事件添加到 RadioGroup。

class CreateUserComponent extends React.Component {
    constructor(props) {
    super(props); 
    this.state={radio:''};
    this.updateRadioButton = this.updateRadioButton.bind(this);
}

updateRadioButton(value) {
    this.setState({ radio: value });
}

render() {
 return(
   <RadioGroup horizontal onChange={this.updateRadioButton}>
        <RadioButton value="Male">Male</RadioButton>
        <RadioButton value="Female">Female</RadioButton>
   </RadioGroup>
 );
}