Flutter Vertical viewport 被赋予无限高度

Question

我需要构建一个基于日期选择的动态 ListView ，然后我将调用一个 API 来获取数据并相应地填充列表。然后在 ListView 本身的最后我有一个向下按钮，我按下它应该打开一个扩展面板。所以为了做一个列表，我调用一个函数 Widget buildDynamicList(BuildContext context) 来根据新数据动态填充新列表.我收到此错误。

I/flutter ( 3438): The following assertion was thrown during performResize():
I/flutter ( 3438): Vertical viewport was given unbounded height.
I/flutter ( 3438): Viewports expand in the scrolling direction to fill their container.In this case, a vertical
I/flutter ( 3438): viewport was given an unlimited amount of vertical space in which to expand. This situation
I/flutter ( 3438): typically happens when a scrollable widget is nested inside another scrollable widget.

在下面的第一列中，我画了一张卡片，我将在其中选择日期，在下面的下一列中，我将调用此函数 buildDynamicList(context)

 new Column(
                      children: <Widget>[
                        Container(
                                margin: new EdgeInsets.fromLTRB(20, 10, 0, 0),
                                decoration: new BoxDecoration(
                                                           color:Color.fromRGBO(36, 46, 66, 1),
                                                          borderRadius: new BorderRadius.only(
                                                            topLeft: const Radius.circular(35),
                                                            bottomLeft: const Radius.circular(35)
                                                          ),

                                                          ),
                                width: double.infinity,
                                height: 55.0,

                                //child:Expanded(
                                child:Card(

                                color: Color.fromRGBO(36, 46, 66, 1),
                                clipBehavior: Clip.antiAlias,
                                shape: RoundedRectangleBorder(
                                    borderRadius: BorderRadius.circular(35) 
                                ),

                                child: Row(
                                    crossAxisAlignment: CrossAxisAlignment.center,
                                    children: <Widget>[
                                    Container(
                                      height: 40.0,
                                      width: 50.0,

                                      decoration: BoxDecoration(
                                        color: Colors.blueAccent,
                                        shape: BoxShape.circle,
                                      border: new Border.all(
                                        color: Colors.blue,
                                        width: 2.5,
                                      ),
                                      ),
                                      child: Icon(
                                                              Icons.calendar_today,
                                                              size: 25.0,
                                                              color: Colors.white,
                                                            ),
                                      ),
                                      Expanded(

                                        child:
                                        Column(
                                          //mainAxisAlignment: MainAxisAlignment.center,
                                          //mainAxisAlignment: MainAxisAlignment.center, 
                                          mainAxisAlignment: MainAxisAlignment.center, 
                                          crossAxisAlignment: CrossAxisAlignment.center, 
                                          children: [ 
                                          //new Row( 
                                          // mainAxisSize: MainAxisSize.max, 

                                          //children: <Widget>[ 
                                          new Text( 
                                          "From", style: TextStyle(color:Colors.white),
                                          ), 
                                          new Text( 
                                          "01 Jan 2019", style: TextStyle(color:Colors.white),
                                          ), 
                                        // new Icon(Icons.account_circle) 
                                          //style: Theme.of(context).textTheme.body2 

                                          ],
                                        ),
                                      ),
                                      Expanded(

                                        child:
                                        Column(
                                          //mainAxisAlignment: MainAxisAlignment.center,
                                          //mainAxisAlignment: MainAxisAlignment.center, 
                                          mainAxisAlignment: MainAxisAlignment.center, 
                                          crossAxisAlignment: CrossAxisAlignment.center, 
                                          children: [ 
                                          //new Row( 
                                          // mainAxisSize: MainAxisSize.max, 

                                          //children: <Widget>[ 
                                          new Text( 
                                          "To", style: TextStyle(color:Colors.white),
                                          ), 
                                          new Text( 
                                          "02 Jan 2019", style: TextStyle(color:Colors.white),
                                          ), 
                                        // new Icon(Icons.account_circle) 
                                          //style: Theme.of(context).textTheme.body2 

                                          ],
                                        ),
                                      ),
                                    ],

                                )
                                ),
                                //)

                        ),
                      ]

                  ),       
                  new Column(

                      mainAxisSize: MainAxisSize.min,

                      children: <Widget>[
                        buildDynamicList(context)

                      ],

                  )

这是我为动态列表调用的函数。我尝试了很多选择，例如扩展、灵活等都给我错误。

Widget buildDynamicList(BuildContext context) {
    return new Container(
                    //decoration: new BoxDecoration(border: new Border.all(width: 2.0)),
                    height:200,

                      //fit: FlexFit.loose ,
                      child: ListView.builder(
                        //  shrinkWrap: true,
                          itemCount: vehicles.length,                      
                          itemBuilder: (BuildContext ctxt, int index) {

                               return new ListView(
                                 children: <Widget>[
                               new Text("TEE"),
                                 ] 


                               );
                          }

                     ),
                    );

 }

Answer 1

删除嵌套的 listview，因为它是不必要的:

   Widget buildDynamicList(BuildContext context) {
    return new Container(
                //decoration: new BoxDecoration(border: new Border.all(width: 2.0)),
                height:200,
                //fit: FlexFit.loose ,
                child: ListView.builder(
                    //shrinkWrap: true,
                      itemCount: vehicles.length,                      
                      itemBuilder: (BuildContext ctxt, int index) {
                           return Text("TEE"),
                      }
                   ),
                );
             }