Reactjs 如何在react组件的map方法中添加复选框或单选按钮?
如何在map方法中添加复选框或单选按钮。我已经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。我如何才能在其中添加单选按钮,以便用户可以检查答案Reactjs 如何在react组件的map方法中添加复选框或单选按钮?,reactjs,react-hooks,Reactjs,React Hooks,如何在map方法中添加复选框或单选按钮。我已经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。我如何才能在其中添加单选按钮,以便用户可以检查答案 import React, { useState, useEffect } from "react"; import { Fragment } from "react"; import "./Survey.css"; imp
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;
import React,{useState,useffect}来自“React”;
从“react”导入{Fragment};
导入“/Survey.css”;
从“./modals/CreateSurvey”导入CreateSurvey;
从“./Card/Card”导入卡片;
const Survey=()=>{
const[modal,setModal]=useState(false);
常量[surveyList,setSurveyList]=useState([]);
useffect(()=>{
设arr=localStorage.getItem(“surveyList”);
如果(arr){
让obj=JSON.parse(arr);
设置曲面列表(obj);
}
}, []);
常量删除调查=(索引)=>{
让圣堂武士=调查者;
模板拼接(索引,1);
setItem(“surveyList”,JSON.stringify(templast));
setSurveyList(圣殿骑士);
window.location.reload();
};
常量切换=()=>{
setModal(!modal);
};
常量updateListaray=(对象,索引)=>{
让圣堂武士=调查者;
圣殿骑士[index]=obj;
setItem(“surveyList”,JSON.stringify(templast));
setSurveyList(圣殿骑士);
window.location.reload();
};
const saveSurvey=(surveyObj)=>{
让圣堂武士=调查者;
圣殿骑士推(surveyObj);
setItem(“surveyList”,JSON.stringify(templast));
设置surveyList(surveyList);
setModal(假);
};
返回(
调查
setModal(真)}>
创建调查
{调查列表&&
surveyList.map((对象,索引)=>(
))}
);
};
出口违约调查;
//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;
import React,{useState}来自“React”;
导入“/Card.css”;
常量卡=({surveyObj,deleteSurvey,index})=>{
const[modal,setModal]=useState(false);
常量切换=()=>{
setModal(!modal);
};
常量deleteHandler=()=>{
调查(索引);
};
返回(
{surveyObj.name}
{surveyObj.answerOne}
);
};
导出默认卡;
//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;
import React,{useState}来自“React”;
从“reactstrap”导入{Button,Modal,ModalHeader,ModalBody,ModalFooter};
从“react”导入{Fragment};
const CreateSurvey=({model,toggle,save})=>{
const[question,setQuestion]=useState(“”);
const[answerOne,setAnswerOne]=useState(“”);
const[answerTwo,setAnswerTwo]=useState(“”);
const[answerThree,setAnswerThree]=useState(“”);
const[answerFour,setAnswerFour]=useState(“”);
常量changeHandler=(e)=>{
常量{name,value}=e.target;
如果(姓名=“问题”){
设置问题(值);
}否则{
setAnswerOne(值);
}
};
const saveHandler=(e)=>{
e、 预防默认值();
让surveyObj={};
surveyObj[“name”]=问题;
surveyObj[“answerOne”]=answerOne;
surveyObj[“answerTwo”]=answerTwo;
surveyObj[“answerThree”]=answerThree;
surveyObj[“answerFour”]=answerFour;
save(surveyObj);
};
返回(
创建一个调查问题
调查问题
调查答案
答复1
答复2
答复3
答复4
创造
取消
);
};
导出默认调查;
据我所知,您希望在map方法中添加多个组件。您只需按照以下方式进行操作:
{surveyList &&
surveyList.map((obj, index) => (
<>
<Card
surveyObj={obj}
index={index}
deleteSurvey={deleteSurvey}
updateListArray={updateListArray}
/>
<input type="checkbox" name="userchoice" />
</>
))}
{surveyList&&
surveyList.map((对象,索引)=>(
))}
我已经添加了支持js的文件。我只想要答案的复选框,而不是问题的复选框。我想你想知道如何在地图中渲染多个组件。扫描您的代码看起来就像,您正在使用卡片组件来显示每个答案。您可以在卡组件中添加单选按钮,它应该可以工作。不需要在地图中处理它。