我在 flutter 中遇到了 DataTable 的问题。当用户单击其中一个时，我想更改行的状态，但我发现如何在 DataRow 中使用 selected: true 来“手动”执行此操作。
如何让用户通过更改状态只选择一行并取消选择其余行？
content: Column(
children: <Widget>[
DataTable(
columns: [
DataColumn(label: Text('Language')),
DataColumn(label: Text('Translation')),
],
rows: [
DataRow(selected: true, cells: [
DataCell(
Text(
"RO",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
),
onTap: () {
setState(() {
color = Colors.lightBlueAccent;
});
},
),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'paine'),
),
),
]),
DataRow(cells: [
DataCell(
Text(
"EN",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
), onTap: () {
print('EN is clicked');
}),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'bread'),
),
),
]),
DataRow(cells: [
DataCell(
Text(
"FR",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
), onTap: () {
print('FR is clicked');
}),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'pain'),
),
),
]),
],
),
],
),
最佳答案
您可以在下面复制过去运行的完整代码
您可以像这样在 selected 中使用条件 0 == selectedIndex 其中 0 是 DataRow index
并在 onSelectChanged 中更改 selectedIndex
代码片段
int selectedIndex = -1;
...
rows: [
DataRow(
selected: 0 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 0;
});
},
...
DataRow(
selected: 1 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 1;
});
},
工作演示
完整代码
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Color color;
int selectedIndex = -1;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
children: <Widget>[
DataTable(
onSelectAll: (val) {
setState(() {
selectedIndex = -1;
});
},
columns: [
DataColumn(label: Text('Language')),
DataColumn(label: Text('Translation')),
],
rows: [
DataRow(
selected: 0 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 0;
});
},
cells: [
DataCell(
Text(
"RO",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
),
onTap: () {
setState(() {
color = Colors.lightBlueAccent;
});
},
),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'paine'),
),
),
]),
DataRow(
selected: 1 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 1;
});
},
cells: [
DataCell(
Text(
"EN",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
), onTap: () {
print('EN is clicked');
}),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'bread'),
),
),
]),
DataRow(
selected: 2 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 2;
});
},
cells: [
DataCell(
Text(
"FR",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
), onTap: () {
print('FR is clicked');
}),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'pain'),
),
),
]),
],
),
],
),
),
);
}
}
关于Flutter DataTable 选择行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/63610347/