更新时间:2023-12-06 16:14:46
我遇到了同样的问题.以下是适用于我的解决方案:
I faced with the same problem. Below is solution that works for me:
class Person {
String name;
int age;
num hight;
Person({this.name, this.age, this hight});
}
class HomePageState extends State<HomePage> {
bool _sortNameAsc = true;
bool _sortAgeAsc = true;
bool _sortHightAsc = true;
bool _sortAsc = true;
int _sortColumnIndex;
List<Person> _persons;
@override
initState() {
super.initState();
_persons = [
Person(
name: 'George',
age: 18,
height: 173,
),
Person(
name: 'Dave',
age: 21,
height: 183,
),
Person(
name: 'Sam',
age: 55,
height: 170,
),
];
}
@override
Widget build(BuildContext context) {
var myColumns = [
DataColumn(
label: Text('name'),
onSort: (columnIndex, sortAscending) {
setState(() {
if (columnIndex == _sortColumnIndex) {
_sortAsc = _sortNameAsc = sortAscending;
} else {
_sortColumnIndex = columnIndex;
_sortAsc = _sortNameAsc;
}
_persons.sort((a, b) => a.name.compareTo(b.name));
if (!_sortAscending) {
_persons = _persons.reversed.toList();
}
});
},
),
DataColumn(
label: Text('age'),
onSort: (columnIndex, sortAscending) {
setState(() {
if (columnIndex == _sortColumnIndex) {
_sortAsc = _sortAgeAsc = sortAscending;
} else {
_sortColumnIndex = columnIndex;
_sortAsc = _sortAgeAsc;
}
_persons.sort((a, b) => a.age.compareTo(b.age));
if (!_sortAscending) {
_persons = _persons.reversed.toList();
}
});
},
),
DataColumn(
label: Text('Hight'),
onSort: (columnIndex, sortAscending) {
setState(() {
if (columnIndex == _sortColumnIndex) {
_sortAsc = _sortHeightAsc = sortAscending;
} else {
_sortColumnIndex = columnIndex;
_sortAsc = _sortHeightAsc;
}
_persons.sort((a, b) => a.height.compareTo(b.height));
if (!_sortAscending) {
_persons = _persons.reversed.toList();
}
});
},
),
];
var myRows = _persons.map((person) {
return DataRow(cells: [
DataCell( Text(perosn.name)),
DataCell( Text('${person.age}')),
DataCell( Text('${person.height}cm')),
]);
});
return Scaffold(
body: Center(
child: Container(
child: DataTable(
columns: myColumns,
rows: myRows,
sortColumnIndex: _sortColumnIndex,
sortAscending: _sortAsc,
)),
),
);
}
}