Question

我想显示选中的按钮的值是否与数据库中的答案相同，同时渲染数据库中的数据时，我有一个名为且具有正确答案的值的变量。

此外，我能够获取所选单选按钮的值。我想根据无线电值是否与正确答案相同来渲染两个div，但我不知道该怎么做。

import React, { Component } from 'react';
import axios from 'axios'
import {Form,Radio,} from 'semantic-ui-react'
import 'semantic-ui-css/semantic.min.css';





export default class QuestionList extends Component {
    constructor(props){
        super(props)
        this.handleOptionChange = this.handleOptionChange.bind(this);
        this.handleFormSubmit = this.handleFormSubmit.bind(this);

        this.state = {questions:[],
          answer:''}

    }

    handleOptionChange(e){
      this.setState({
        answer: e.target.value
      });
    }

    handleFormSubmit (e) {
      e.preventDefault();

      console.log('You have selected:', this.state.answer);
    }


    componentDidMount(){
        axios.get('http://localhost:5000/question/')
        .then(respose =>{
            this.setState({questions:respose.data})
        })
        .catch(error => {
            console.log(error);
        });

    };



    questionList() {

        return this.state.questions.map(currentquestion => {

          return(
            <Form onSubmit ={this.handleFormSubmit}>
        <Form.Field>
         <h3>Q.  {currentquestion.ques}</h3>
          <h6>Correct Answer is {currentquestion.ans} </h6>
        </Form.Field>
        <Form.Field>
          <Radio
            label={currentquestion.options[0]}
            name='radioGroup'
            value ={currentquestion.options[0]}
            checked = {this.state.answer === currentquestion.options[0]}
            onChange={this.handleOptionChange}

          />
        </Form.Field>
        <Form.Field>
          <Radio
            label={currentquestion.options[1]}
            name='radioGroup'
            value ={currentquestion.options[1]}
            checked = {this.state.answer === currentquestion.options[1]}
            onChange={this.handleOptionChange}

          />
        </Form.Field>
        <Form.Field>
          <Radio
            label={currentquestion.options[2]}
            name='radioGroup'
            value = {currentquestion.options[2]}
            checked = {this.state.answer === currentquestion.options[2]}
            onChange={this.handleOptionChange}

          />
        </Form.Field>
        <Form.Field>
          <Radio
            label={currentquestion.options[3]}
            name='radioGroup'
            value={currentquestion.options[3]}
            checked = {this.state.answer === currentquestion.options[3]}
            onChange={this.handleOptionChange}

          />
        </Form.Field>

        <button type ="submit" class="ui button" >Submit Answer</button>
        <hr />

      </Form>

          );
        })
      }



  render() {
    return (
        <div>
        <h2>Questions</h2>
        <hr />
        <hr />
        <p>{ this.questionList() } </p>

      </div>
    )
  }

但是当我尝试选择单选按钮时，我无法对其进行检查，这意味着我无法在应答状态下存储任何内容。

Answer 1

在semantic-ui中的

onChange带有两个参数（e，值），如果您在console.log中将handlechange的值放在这里，则为您应该在状态中输入的值，可以在documentation的{{3}}内的游乐场中尝试使用希望这会有所帮助。

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