使用useState（Reactjs）时未选中材料表复选框
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[您好，我是新来的人，我在物料表中遇到问题，这是当useState与onSelectionChange一起使用时，复选框未选中。我创建了一个表并设置了onSelectedChange（）函数，并在其中添加了useState（）以及从onSelectionChange中获取的数据。单击时未选中该复选框。请帮助我。
代码：
const [selects, setSelects] = useState({});
const handleCheckboxClick = (rowData) => {
setSelects({
selectedItems: {
...rowData,
tableData: {
checked: true,
},
},
});
};
<MaterialTable
title="Asset Group"
options={[
pageSizeOptions: false,
headerStyle: {
backgroundColor: "#fff",
},
selection: true,
showFirstLastPageButtons: false,
]}
columns={assetGroupColumns}
onSelectionChange={(event) => {
handleCheckboxClick(event);
//console.log(event)
}}
data={arrangeData(data.asset_group)}
components={{
Toolbar: (props) => (
<div style={{ display: "none" }}>
<MTableToolbar {...props} />
</div>
),
}}
/>
</>
非常感谢
答案
[嗨，请在下面举这个例子。这是一个非常大的示例，但是非常适合您的要求。
import React from 'react';
import PropTypes from 'prop-types';
import clsx from 'clsx';
import {lighten, makeStyles} from '@material-ui/core/styles';
import Table from '@material-ui/core/Table';
import TableBody from '@material-ui/core/TableBody';
import TableCell from '@material-ui/core/TableCell';
import TableContainer from '@material-ui/core/TableContainer';
import TableHead from '@material-ui/core/TableHead';
import TablePagination from '@material-ui/core/TablePagination';
import TableRow from '@material-ui/core/TableRow';
import TableSortLabel from '@material-ui/core/TableSortLabel';
import Toolbar from '@material-ui/core/Toolbar';
import Typography from '@material-ui/core/Typography';
import Paper from '@material-ui/core/Paper';
import Checkbox from '@material-ui/core/Checkbox';
import IconButton from '@material-ui/core/IconButton';
import Tooltip from '@material-ui/core/Tooltip';
import FormControlLabel from '@material-ui/core/FormControlLabel';
import Switch from '@material-ui/core/Switch';
import DeleteIcon from '@material-ui/icons/Delete';
import FilterListIcon from '@material-ui/icons/FilterList';
function createData(name, calories, fat, carbs, protein) {
return {name, calories, fat, carbs, protein};
}
const rows = [
createData('Cupcake', 305, 3.7, 67, 4.3),
createData('Donut', 452, 25.0, 51, 4.9),
createData('Eclair', 262, 16.0, 24, 6.0),
createData('Frozen yoghurt', 159, 6.0, 24, 4.0),
createData('Gingerbread', 356, 16.0, 49, 3.9),
createData('Honeycomb', 408, 3.2, 87, 6.5),
createData('Ice cream sandwich', 237, 9.0, 37, 4.3),
createData('Jelly Bean', 375, 0.0, 94, 0.0),
createData('KitKat', 518, 26.0, 65, 7.0),
createData('Lollipop', 392, 0.2, 98, 0.0),
createData('Marshmallow', 318, 0, 81, 2.0),
createData('Nougat', 360, 19.0, 9, 37.0),
createData('Oreo', 437, 18.0, 63, 4.0),
];
function descendingComparator(a, b, orderBy) {
if (b[orderBy] < a[orderBy]) {
return -1;
}
if (b[orderBy] > a[orderBy]) {
return 1;
}
return 0;
}
function getComparator(order, orderBy) {
return order === 'desc'
? (a, b) => descendingComparator(a, b, orderBy)
: (a, b) => -descendingComparator(a, b, orderBy);
}
function stableSort(array, comparator) {
const stabilizedThis = array.map((el, index) => [el, index]);
stabilizedThis.sort((a, b) => {
const order = comparator(a[0], b[0]);
if (order !== 0) return order;
return a[1] - b[1];
});
return stabilizedThis.map((el) => el[0]);
}
const headCells = [
{id: 'name', numeric: false, disablePadding: true, label: 'Dessert (100g serving)'},
{id: 'calories', numeric: true, disablePadding: false, label: 'Calories'},
{id: 'fat', numeric: true, disablePadding: false, label: 'Fat (g)'},
{id: 'carbs', numeric: true, disablePadding: false, label: 'Carbs (g)'},
{id: 'protein', numeric: true, disablePadding: false, label: 'Protein (g)'},
];
function EnhancedTableHead(props) {
const {classes, onSelectAllClick, order, orderBy, numSelected, rowCount, onRequestSort} = props;
const createSortHandler = (property) => (event) => {
onRequestSort(event, property);
};
return (
<TableHead>
<TableRow>
<TableCell padding="checkbox">
<Checkbox
indeterminate={numSelected > 0 && numSelected < rowCount}
checked={rowCount > 0 && numSelected === rowCount}
onChange={onSelectAllClick}
inputProps={{'aria-label': 'select all desserts'}}
/>
</TableCell>
{headCells.map((headCell) => (
<TableCell
key={headCell.id}
align={headCell.numeric ? 'right' : 'left'}
padding={headCell.disablePadding ? 'none' : 'default'}
sortDirection={orderBy === headCell.id ? order : false}
>
<TableSortLabel
active={orderBy === headCell.id}
direction={orderBy === headCell.id ? order : 'asc'}
onClick={createSortHandler(headCell.id)}
>
{headCell.label}
{orderBy === headCell.id ? (
<span className={classes.visuallyHidden}>
{order === 'desc' ? 'sorted descending' : 'sorted ascending'}
</span>
) : null}
</TableSortLabel>
</TableCell>
))}
</TableRow>
</TableHead>
);
}
EnhancedTableHead.propTypes = {
classes: PropTypes.object.isRequired,
numSelected: PropTypes.number.isRequired,
onRequestSort: PropTypes.func.isRequired,
onSelectAllClick: PropTypes.func.isRequired,
order: PropTypes.oneOf(['asc', 'desc']).isRequired,
orderBy: PropTypes.string.isRequired,
rowCount: PropTypes.number.isRequired,
};
const useToolbarStyles = makeStyles((theme) => ({
root: {
paddingLeft: theme.spacing(2),
paddingRight: theme.spacing(1),
},
highlight:
theme.palette.type === 'light'
? {
color: theme.palette.secondary.main,
backgroundColor: lighten(theme.palette.secondary.light, 0.85),
}
: {
color: theme.palette.text.primary,
backgroundColor: theme.palette.secondary.dark,
},
title: {
flex: '1 1 100%',
},
}));
const EnhancedTableToolbar = (props) => {
const classes = useToolbarStyles();
const {numSelected} = props;
return (
<Toolbar
className={clsx(classes.root, {
[classes.highlight]: numSelected > 0,
})}
>
{numSelected > 0 ? (
<Typography className={classes.title} color="inherit" variant="subtitle1" component="div">
{numSelected} selected
</Typography>
) : (
<Typography className={classes.title} variant="h6" id="tableTitle" component="div">
Nutrition
</Typography>
)}
{numSelected > 0 ? (
<Tooltip title="Delete">
<IconButton aria-label="delete">
<DeleteIcon/>
</IconButton>
</Tooltip>
) : (
<Tooltip title="Filter list">
<IconButton aria-label="filter list">
<FilterListIcon/>
</IconButton>
</Tooltip>
)}
</Toolbar>
);
};
EnhancedTableToolbar.propTypes = {
numSelected: PropTypes.number.isRequired,
};
const useStyles = makeStyles((theme) => ({
root: {
width: '100%',
},
paper: {
width: '100%',
marginBottom: theme.spacing(2),
},
table: {
minWidth: 750,
},
visuallyHidden: {
border: 0,
clip: 'rect(0 0 0 0)',
height: 1,
margin: -1,
overflow: 'hidden',
padding: 0,
position: 'absolute',
top: 20,
width: 1,
},
}));
export default function EnhancedTable() {
const classes = useStyles();
const [order, setOrder] = React.useState('asc');
const [orderBy, setOrderBy] = React.useState('calories');
const [selected, setSelected] = React.useState([]);
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