我可以在螢屏上呈現水平串列視圖或垂直串列視圖，但不能同時在列中成功。這種布局在許多電子商務網站上很常見。用戶從水平串列中選擇流派，電影串列垂直顯示
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:stackoverflow_pkg/stackoverflow_pkg.dart';
void main() {
runApp(const MyApp());
}
class MyCustomScrollBehavior extends MaterialScrollBehavior {
// Override behavior methods and getters like dragDevices
@override
Set<PointerDeviceKind> get dragDevices => {
PointerDeviceKind.touch,
PointerDeviceKind.mouse,
};
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
scrollBehavior: MyCustomScrollBehavior(),
theme: ThemeData(
// This is the theme of your application.
//
// Try running your application with "flutter run". You'll see the
// application has a blue toolbar. Then, without quitting the app, try
// changing the primarySwatch below to Colors.green and then invoke
// "hot reload" (press "r" in the console where you ran "flutter run",
// or simply save your changes to "hot reload" in a Flutter IDE).
// Notice that the counter didn't reset back to zero; the application
// is not restarted.
primarySwatch: Colors.blue,
),
home: TestHorizontalListView(),
);
}
}
class TestHorizontalListView extends StatefulWidget {
TestHorizontalListView({Key? key}) : super(key: key);
@override
State<TestHorizontalListView> createState() => _TestHorizontalListViewState();
}
class _TestHorizontalListViewState extends State<TestHorizontalListView> {
List<String> lstData=['A','B','C','D','E','F','G'];
final ScrollController _horizontal_scrollcontroller = ScrollController();
final ScrollController _vertical_scrollcontroller=ScrollController();
/*_buildCard(String value)
{
return Expanded(child:Container(
margin: const EdgeInsets.symmetric(vertical: 20.0),
width:300,height:400,child:Card(child: Expanded(child:Text(value,textAlign: TextAlign.center, style:TextStyle(fontSize:30))),)));
}
*/
void _scrollRight() {
_horizontal_scrollcontroller.animateTo(
_horizontal_scrollcontroller.position.maxScrollExtent,
duration: Duration(seconds: 1),
curve: Curves.fastOutSlowIn,
);
}
void _scrollLeft() {
_horizontal_scrollcontroller.animateTo(
0,
duration: Duration(seconds: 1),
curve: Curves.fastOutSlowIn,
);
}
_segment1()
{
return
Expanded(child:SingleChildScrollView(child:
Expanded(child:
Container(height:300,
width:MediaQuery.of(context).size.width,
child:Row(children: [
FloatingActionButton.small(
onPressed: _scrollRight, child: const Icon(Icons.arrow_right),),
Expanded(child:Scrollbar(child:ListView.builder(
itemCount: lstData.length,
controller: _horizontal_scrollcontroller,
scrollDirection: Axis.horizontal,
itemBuilder:(context,index)
{
return CardFncs.getSimpleCard(lstData[index]);
})
,),
),
FloatingActionButton.small(onPressed: _scrollLeft, child: const
Icon(Icons.arrow_left),),
]))
,
)
));
}
_segment2()
{
return
SizedBox(
height:500,
child: ListView.builder(
controller: _vertical_scrollcontroller,
itemCount: lstData.length,itemBuilder:(context, index) {
return
Container(width:350,
height:300,
margin: const EdgeInsets.symmetric(vertical: 20.0),
child:ListTile(
title:Text(lstData[index])
));
}));
}
@override
void initState() {
// TODO: implement initState
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(appBar: AppBar(title: Text("horizontal listview",)),body:
Column(children:[
Row(
children: [
Container(
width: 300,
child: TextFormField(
decoration: const InputDecoration(
labelText:"Input",
enabledBorder: UnderlineInputBorder(borderSide:BorderSide(color:Colors.red),
borderRadius: BorderRadius.all(Radius.elliptical(5,10))
),
)))]),
_segment1(),
_segment2(),
])
);
}
}
class CardFncs
{
static getSimpleCard(String value)
{
return Expanded(child:Container(
margin: const EdgeInsets.symmetric(vertical: 20.0),
width:300,height:400,child:Card(child: Expanded(child:Text(value,textAlign:
TextAlign.center, style:TextStyle(fontSize:30))),)));
}
}
uj5u.com熱心網友回復：
代碼更新，去掉SingleChildScrollView里面的Expanded，就在下面第一個：
class TestHorizontalListView extends StatefulWidget {
TestHorizontalListView({Key? key}) : super(key: key);
@override
State<TestHorizontalListView> createState() => _TestHorizontalListViewState();
}
class _TestHorizontalListViewState extends State<TestHorizontalListView> {
List<String> lstData = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'P', 'U', 'V', 'W'];
final ScrollController _horizontal_scrollcontroller = ScrollController();
final ScrollController _vertical_scrollcontroller = ScrollController();
/*_buildCard(String value)
{
return Expanded(child:Container(
margin: const EdgeInsets.symmetric(vertical: 20.0),
width:300,height:400,child:Card(child: Expanded(child:Text(value,textAlign: TextAlign.center, style:TextStyle(fontSize:30))),)));
}
*/
void _scrollRight() {
_horizontal_scrollcontroller.animateTo(
_horizontal_scrollcontroller.position.maxScrollExtent,
duration: Duration(seconds: 1),
curve: Curves.fastOutSlowIn,
);
}
void _scrollLeft() {
_horizontal_scrollcontroller.animateTo(
0,
duration: Duration(seconds: 1),
curve: Curves.fastOutSlowIn,
);
}
_segment1() {
return Expanded(
flex: 1,
child: SingleChildScrollView(
child: Container(
height: 150,
width: MediaQuery.of(context).size.width,
child: Row(children: [
FloatingActionButton.small(
onPressed: _scrollRight,
child: const Icon(Icons.arrow_right),
),
Expanded(
child: Scrollbar(
child: ListView.builder(
itemCount: lstData.length,
controller: _horizontal_scrollcontroller,
scrollDirection: Axis.horizontal,
itemBuilder: (context, index) {
return Container(
margin: const EdgeInsets.symmetric(vertical: 20.0),
width: 100,
height: 100,
child: Card(
child: Text(lstData[index], textAlign: TextAlign.center, style: const TextStyle(fontSize: 30)),
));
}),
),
),
FloatingActionButton.small(
onPressed: _scrollLeft,
child: const Icon(Icons.arrow_left),
),
]))));
}
_segment2() {
return Expanded(
// height: 480,
flex: 3,
child: ListView.builder(
controller: _vertical_scrollcontroller,
itemCount: lstData.length,
itemBuilder: (context, index) {
return Container(width: 150, height: 100, margin: const EdgeInsets.symmetric(vertical: 20.0), child: ListTile(title: Text(lstData[index])));
}));
}
@override
void initState() {
// TODO: implement initState
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
"horizontal listview",
)
),
resizeToAvoidBottomInset: false,
body: Column(children: [
Row(children: [
Container(
width: 300,
child: TextFormField(
decoration: const InputDecoration(
labelText: "Input",
enabledBorder: UnderlineInputBorder(borderSide: BorderSide(color: Colors.red), borderRadius: BorderRadius.all(Radius.elliptical(5, 10))),
)))
]),
_segment1(),
_segment2(),
]
)
);
}
}
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