如何在一列中同时创建水平和垂直列表视图段

Question

我可以在屏幕上呈现水平列表视图或垂直列表视图，但不能同时在一列中成功呈现。这种布局在许多电子商务网站上很常见。用户 select 水平列表中的流派和垂直显示的电影列表

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:Whosebug_pkg/Whosebug_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))),)));
  }
}

Answer 1

代码更新，移除 SingleChildScrollView 中的 Expanded inside，只有下面的第一个：

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: [
          Expanded(child: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(),
        ]
        )
    );
  }
}

如何在一列中同时创建水平和垂直列表视图段

how to create both a horizontal and vertical list view segments in one column

listview

flutter

sized-box

list.builder

parentdatawidget