Reactjs 如何发送单选按钮';将值设置为状态,并在单击另一个单选按钮时更改该值
我正试图将组件中选定单选按钮的值推入页面上的状态,这样,当选择另一个单选按钮时,它会用新选择的值更新状态中的值。Reactjs 如何发送单选按钮';将值设置为状态,并在单击另一个单选按钮时更改该值,reactjs,Reactjs,我正试图将组件中选定单选按钮的值推入页面上的状态,这样,当选择另一个单选按钮时,它会用新选择的值更新状态中的值。 问题是,每当我更改所选单选按钮时,它都会添加一个新值,而不是更新它 这是我的页面 import React, { useContext, useState, useEffect } from 'react'; import { Form, Button, Popconfirm, Icon, Input, Radio, Collapse, Checkbox } from 'antd';
问题是,每当我更改所选单选按钮时,它都会添加一个新值,而不是更新它 这是我的页面
import React, { useContext, useState, useEffect } from 'react';
import { Form, Button, Popconfirm, Icon, Input, Radio, Collapse, Checkbox } from 'antd';
import Axios from 'axios';
import CompanyContext from '../util/UserContext';
import renderEmpty from 'antd/lib/config-provider/renderEmpty';
import InputOnly from '../components/InputOnly';
import CustomInput from '../components/Input';
import Lampiran from '../components/Lampiran';
import CustomCheckBox from '../components/CheckBox';
export default function Hitung() {
let [loading, setLoading] = useState(false);
let [form, setForm] = useState([]);
let [soal, setSoal] = useState([]);
let [pilihan, setPilihan] = useState([]);
let [test, setTest] = useState([1, 2, 3, 4, 5]);
let [answer, setAnswer] = useState("");
let [coba, setCoba] = useState([]);
let [coba2, setCoba2] = useState([]);
const company = useContext(CompanyContext);
let answertemp = []
useEffect(() => {
async function getData() {
try {
let data = await Axios.get('http://localhost:5000/lelang/getquestion');
setSoal(data.data.pertanyaan);
}
catch (e) {
console.log(e);
}
}
getData();
}, []);
function onAnswer(data) {
answertemp.push(data);
console.log(answertemp);
}
function RenderQuestion() {
if (soal.length != 0) {
return soal.map(data => {
switch (data.type_question) {
case "input":
return (<CustomInput data={data} onAnswer={onAnswer} />)
case "input_only":
return (<InputOnly data={data} onAnswer={answer => {
if(coba.length!=0){
for(let i =0;i<coba.length;i++){
if (coba[i].id_question===answer.id_question){
coba[i].answer=answer.answer;
break;
}
else if (i<coba.length-1){
continue;
}
else{
setCoba([...coba,answer])
}
}
}
else{
console.log('add');
setCoba([...coba,answer])
}
}} />)
case "lampiran":
return (<Lampiran data={data} onAnswer={onAnswer} />)
case "checkbox":
return (<CustomCheckBox data={data} onAnswer={onAnswer} />)
}
})
}
else {
return (<h2 style={{ textAlign: "center" }}>Loading....</h2>)
}
}
//insert_answer
async function submit(e) {
setAnswer(answertemp)
setLoading(true);
e.preventDefault();
try {
const token = await Axios.post('http://localhost:5000/lelang/insert_answer', company.data);
}
catch (e) {
alert("error " + e)
}
setLoading(false);
}
return (
<div>
<h1 style={{ textAlign: 'center' }}>Input Penilaian {company.data}</h1>
<div style={{ padding: '30px' }}>
<Form>
{RenderQuestion()}
<button onClick={() => console.log(coba)}>Simpan</button>
</Form>
</div>
</div>
);
}
import React,{useContext,useState,useffect}来自“React”;
从“antd”导入{表单、按钮、Popconfirm、图标、输入、单选、折叠、复选框};
从“Axios”导入Axios;
从“../util/UserContext”导入公司上下文;
从“antd/lib/config provider/rendermpty”导入rendermpty;
从“../components/InputOnly”导入InputOnly;
从“../components/Input”导入CustomInput;
从“../components/Lampiran”导入Lampiran;
从“../components/CheckBox”导入CustomCheckBox;
导出默认函数Hitung(){
let[loading,setLoading]=useState(false);
让[form,setForm]=useState([]);
let[soal,setSoal]=useState([]);
让[pilihan,setPilihan]=useState([]);
let[test,setTest]=useState([1,2,3,4,5]);
let[answer,setAnswer]=useState(“”);
让[coba,setCoba]=useState([]);
让[coba2,setCoba2]=useState([]);
const company=useContext(CompanyContext);
让answertemp=[]
useffect(()=>{
异步函数getData(){
试一试{
让数据=等待Axios.get('http://localhost:5000/lelang/getquestion');
setSoal(data.data.pertanyan);
}
捕获(e){
控制台日志(e);
}
}
getData();
}, []);
回答功能(数据){
应答温度推送(数据);
控制台日志(answertemp);
}
函数RenderQuestion(){
如果(总长度!=0){
返回soal.map(数据=>{
开关(数据类型\问题){
案例“输入”:
返回()
案例“仅输入”:
报税表({
如果(coba.长度!=0){
对于(设i=0;iSimpan)
);
}
这是组件
import React, { useContext, useState, useEffect } from 'react';
import { Radio, Input, Form } from 'antd';
export default function CustomInput (props){
let[radioInput,setRadioInput]=useState({});
let[chooseInput, setChooseInput] = useState();
useEffect(()=>{
setRadioInput(props.data);
},[]);
return (
<div>
<p style={{fontWeight:"bold"}}>{radioInput.question}</p>
<Form.Item required>
<Radio.Group
options = {radioInput.variable}
onChange={(data) => props.onAnswer(data.target.value)}
onClick={data => props.onAnswer(data.radioInput.value)}
>
</Radio.Group>
</Form.Item>
</div>
)
}
import React,{useContext,useState,useffect}来自“React”;
从“antd”导入{Radio,Input,Form};
导出默认功能CustomInput(道具){
let[radioInput,setRadioInput]=useState({});
让[chooseInput,setChooseInput]=useState();
useffect(()=>{
设置放射性输入(道具数据);
},[]);
返回(
{radioInput.question}
props.onAnswer(data.target.value)}
onClick={data=>props.onAnswer(data.radioInput.value)}
>
)
}
您需要传递有效的依赖项来侦听更改。在依赖项中发送空数组时,钩子将仅在第一次渲染时发生。在您的情况下,将使用效果更改为
useEffect(()=>{
setRadioInput(props.data);
},[props.data]);
我已经更改了useEffect,但它仍然为状态添加了新的值,而不是更改它