TypeError:无法读取未定义的 React js 的属性“value”
2021-04-29
361
当我在搜索栏上搜索时,出现无法读取属性值等错误,为什么会出现此错误,之前我做了很多表单,但没有出现此错误,请告诉我为什么会出现此错误,我应该使用 Material UI 而不是 Bootstrap 替换吗
Music.js
这是我出现错误的 music.js 文件,我使用 react-hooks 来管理状态
import React, { useState } from 'react';
import { makeStyles } from '@material-ui/core/styles';
import AppBar from '@material-ui/core/AppBar';
import Toolbar from '@material-ui/core/Toolbar';
import Typography from '@material-ui/core/Typography';
import Button from '@material-ui/core/Button';
import IconButton from '@material-ui/core/IconButton';
import MenuIcon from '@material-ui/icons/Menu';
import ExitToAppIcon from '@material-ui/icons/ExitToApp';
import RadioIcon from '@material-ui/icons/Radio';
import firebase from '../Firebase';
import SearchBar from "material-ui-search-bar";
import { useHistory } from 'react-router-dom';
import { Container, Input, TextField } from '@material-ui/core';
const useStyles = makeStyles((theme) => ({
root: {
flexGrow: 1,
},
menuButton: {
marginRight: theme.spacing(2),
},
title: {
flexGrow: 1,
},
search:{
marginTop:30,
},
}));
const Music = () => {
const [search, setSearch] = useState("");
const history = useHistory();
const Logout = () => {
firebase.auth().signOut().then(() => {
alert("Logout Successfull...");
history.push('/');
}).catch((error) => {
console.log(error);
});
}
const classes = useStyles();
return (
<div className={classes.root}>
<AppBar position="static">
<Toolbar>
<IconButton edge="start" className={classes.menuButton} color="inherit" aria-label="menu">
<RadioIcon style={{ fontSize: "30px" }} /> React Music
</IconButton>
<Typography variant="h6" className={classes.title}>
</Typography>
<Button color="inherit" onClick={Logout}> <ExitToAppIcon /> Logout </Button>
</Toolbar>
</AppBar>
<Container>
<SearchBar className={classes.search}
value={search}
onChange={(e)=>setSearch(e.target.value)}/>
</Container>
</div>
);
}
export default Music;