如何在react组件的map方法中添加复选框或单选按钮

Question

如何在map方法中添加复选框或单选按钮。我创建了问答应用程序。我需要为答案添加复选框或单选按钮。卡片组件的下面是打印问题和答案的地方。我如何在那里添加单选按钮，以便用户可以检查答案。

import React, { useState, useEffect } from "react";
import { Fragment } from "react";
import "./Survey.css";
import CreateSurvey from "../modals/CreateSurvey";
import Card from "../card/Card";

const Survey = () => {
const [modal, setModal] = useState(false);
const [surveyList, setSurveyList] = useState([]);

useEffect(() => {
let arr = localStorage.getItem("surveyList");
if (arr) {
let obj = JSON.parse(arr);
setSurveyList(obj);
}
}, []);

const deleteSurvey = (index) => {
let tempList = surveyList;
tempList.splice(index, 1);
localStorage.setItem("surveyList", JSON.stringify(tempList));
setSurveyList(tempList);
window.location.reload();
};

const toggle = () => {
setModal(!modal);
};

const updateListArray = (obj, index) => {
let tempList = surveyList;
tempList[index] = obj;
localStorage.setItem("surveyList", JSON.stringify(tempList));
setSurveyList(tempList);
window.location.reload();
};

const saveSurvey = (surveyObj) => {
let tempList = surveyList;
tempList.push(surveyObj);
localStorage.setItem("surveyList", JSON.stringify(tempList));
setSurveyList(surveyList);
setModal(false);
};
return (
<Fragment>
<div className="header text-center">
<h5>Survey</h5>
<button className="btn btn-primary" onClick={() => setModal(true)}>
Create Survey
</button>
</div>
<div className="survey-container">
{surveyList &&
surveyList.map((obj, index) => (
<Card
surveyObj={obj}
index={index}
deleteSurvey={deleteSurvey}
updateListArray={updateListArray}
/>


))}
</div>
<CreateSurvey toggle={toggle} modal={modal} save={saveSurvey} />
</Fragment>
);
};

export default Survey;

//Card.js

import React, { useState } from "react";
import "./Card.css";
const Card = ({ surveyObj, deleteSurvey, index }) => {
const [modal, setModal] = useState(false);
const toggle = () => {
setModal(!modal);
};
const deleteHandler = () => {
deleteSurvey(index);
};
return (
<div>
<div className="card-wrapper mr-5">
<div className="card-top"></div>
<div className="survey-holder">
<span className="card-header">{surveyObj.name}</span>
<p className="answer"> {surveyObj.answerOne}</p>
<div className="icons">
<i className="far fa-edit edit"></i>
<i className="fas fa-trash-alt delete" onClick={deleteHandler}></i>
</div>
</div>
</div>
</div>
);
};
export default Card;

//Createsurvey.js

import React, { useState } from "react";
import { Button, Modal, ModalHeader, ModalBody, ModalFooter } from "reactstrap";
import { Fragment } from "react";
const CreateSurvey = ({ modal, toggle, save }) => {
const [question, setQuestion] = useState("");
const [answerOne, setAnswerOne] = useState("");
const [answerTwo, setAnswerTwo] = useState("");
const [answerThree, setAnswerThree] = useState("");
const [answerFour, setAnswerFour] = useState("");
const changeHandler = (e) => {
const { name, value } = e.target;
if (name === "question") {
setQuestion(value);
} else {
setAnswerOne(value);
}
};
const saveHandler = (e) => {
e.preventDefault();
let surveyObj = {};
surveyObj["name"] = question;
surveyObj["answerOne"] = answerOne;
surveyObj["answerTwo"] = answerTwo;
surveyObj["answerThree"] = answerThree;
surveyObj["answerFour"] = answerFour;
save(surveyObj);
};
return (
<Fragment>
<Modal isOpen={modal} toggle={toggle}>
<ModalHeader toggle={toggle}>Create a Survey Question</ModalHeader>
<ModalBody>
<form>
<div>
<div className="form-group">
<label>Survey Questions</label>
<input
type="text"
className="form-control"
value={question}
name="question"
onChange={changeHandler}
/>
</div>
</div>
<div className="mt-2">
<label>Survey Answers</label>
<div className="form-group">
<label>Answer 1</label>
<input
type="text"
className="form-control mt-2 mb-2"
value={answerOne}
name="answerOne"
onChange={changeHandler}
/>
</div>
<div className="form-group">
<label>Answer 2</label>
<input
type="text"
className="form-control mt-2 mb-2"
value={answerTwo}
name="answerTwo"
onChange={changeHandler}
/>
</div>
<div className="form-group">
<label>Answer 3</label>
<input
type="text"
className="form-control mt-2 mb-2"
value={answerThree}
name="answerThree"
onChange={changeHandler}
/>
</div>
<div className="form-group">
<label>Answer 4</label>
<input
type="text"
className="form-control mt-2 mb-2"
value={answerFour}
name="answerFour"
onChange={changeHandler}
/>
</div>
</div>
</form>
</ModalBody>
<ModalFooter>
<Button color="primary" onClick={saveHandler}>
Create
</Button>
<Button color="secondary" onClick={toggle}>
Cancel
</Button>
</ModalFooter>
</Modal>
</Fragment>
);
};
export default CreateSurvey;

Answer 1

我所理解的是，您希望在map方法中添加多个组件。你可以简单地这样做：

{surveyList &&
surveyList.map((obj, index) => (
<>
<Card
surveyObj={obj}
index={index}
deleteSurvey={deleteSurvey}
updateListArray={updateListArray}
/>
<input type="checkbox" name="userchoice" />
</> 
))}