我是新来的人 . 我正在尝试使用多个小部件呈现其主体包含Listview的页面 .

listview中的_buildOrderDetails小部件是使用listview.builder（）构建的小部件，其余是正常的小部件 .

问题是页面没有滚动 . 当主体Listview更改为列并且_buildOrderDetails作为子项提供给Expanded时，listview仅限于页面高度的某个范围并被滚动 . 但是当输入被聚焦时，页面会溢出

Widget build(BuildContext context){
return ScopedModelDescendant<MainModel>(
 builder: (BuildContext context, Widget child, MainModel model) {
  return Scaffold(
  appBar: AppBar(
    title: Text('Order Details'),
    actions: <Widget>[
      IconButton(
        onPressed: () {
          model.addNewOrder();
        },
        icon: Icon(Icons.add),
      ),
      BadgeIconButton(
        itemCount: model.ordersCount,
        badgeColor: Color.fromRGBO(37, 134, 16, 1.0),
        badgeTextColor: Colors.white,
        icon: Icon(Icons.shopping_cart, size: 30.0,),
        onPressed: () {}
      ),
    ]
  ),
  body: ListView(
    children: [
      Column(
        children: [
          _buildItemsTitle(),
          Expanded(child: _buildOrderDetails(context, model)),
        ]
      ),
      Card(
            child: Column(
              children:[
                TextField(
                  decoration: InputDecoration(
                    labelText: 'Offer Code'
                  ),
                ),
                RaisedButton(
                  onPressed: (){},
                  child: Text('Apply'),
                )
              ]
            ),
          ),
      Card(child: _orderAmount(context, model),),
      RaisedButton(
        color: Theme.of(context).accentColor,
        onPressed: (){},
        child: Text('Checkout', 
          style: TextStyle(
            fontSize: 20.0,
            color: Colors.white
          )
        ),
      )
    ]
  ),);});}}
flutter flutter-layout