flutter - 在列窗口小部件内容中使用SingleChildScrollview不滚动

Question

Widget build(BuildContext context) {
    return Scaffold(
      resizeToAvoidBottomInset: false,
      backgroundColor: Colors.white,
      body: Container(
        child: Column(
          children: <Widget>[
            Stack(
              fit: StackFit.loose,
              children: <Widget>[
                HeadersVC(),
                Container(
                  margin: EdgeInsets.only(top: 40.0),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.start,
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: <Widget>[
                      FlatButton(
                        splashColor: Colors.transparent,
                        highlightColor: Colors.transparent,
                        onPressed: () {
                          Navigator.pop(context);
                        },
                        child: Icon(
                          Icons.arrow_back,
                          size: 30,
                          color: Colors.white,
                        ),
                      ),
                      Text(
                        widget.headertitleladderPre,
                        style: TextStyle(
                            fontSize: 22.0,
                            color: Colors.white,
                            fontWeight: FontWeight.bold),
                      ),
                    ],
                  ),
                )
              ],
            ),
            SingleChildScrollView(
              padding: EdgeInsets.only(top: 20.0, left: 30.0, right: 30.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: <Widget>[
                  Padding(
                    padding: EdgeInsets.only(top: 10.0),
                  ),
                  //******************************************** Date Picker  */
                  TextFormField(
                    onTap: () async {
                      FocusScope.of(context).requestFocus(new FocusNode());
                      _selectDate(context);
                    },
                    decoration: InputDecoration(
                        enabledBorder: UnderlineInputBorder(
                            borderSide:
                                BorderSide(color: Colors.black26, width: 1.5)),
                        contentPadding: EdgeInsets.only(left: 0.0, right: 0.0),
                        labelText: formatDate(formatedDate),
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black),
                        suffixIcon: new Padding(
                          padding: const EdgeInsets.only(
                              top: 0.0, left: 0.0, right: 0.0, bottom: 0.0),
                          child: SizedBox(
                            height: 15,
                            child: Icon(
                              Icons.calendar_today,
                              color: Colors.red,
                            ),
                          ),
                        )),
                  ),
                  Padding(
                    padding: EdgeInsets.only(left: 0.0, top: 10.0),
                  ),
                  //******************************************** DropDown Button  */
                  Container(
                    child: DropdownButton(
                      underline: Container(
                        height: 1.0,
                        decoration: const BoxDecoration(
                            border: Border(
                                bottom: BorderSide(
                                    color: Colors.black26, width: 1.5))),
                      ),
                      value: _selectedladleno,
                      items: _dropDownladleItems,
                      onChanged: changedDropDownItem,
                      isExpanded: true,
                      isDense: false,
                      icon: Icon(
                        Icons.arrow_drop_down,
                        color: Colors.red,
                      ),
                      iconSize: 30,
                      elevation: 12,
                      style: TextStyle(
                        fontSize: 15,
                      ),
                    ),
                  ),
                  //******************************************** Radio Button  */
                  ButtonBar(
                    alignment: MainAxisAlignment.start,
                    buttonPadding: EdgeInsets.only(left: 0.0),
                    children: <Widget>[
                      Radio(
                        groupValue: _character,
                        onChanged: (SingingCharacter value) {
                          setState(() {
                            _character = value;
                            print(_character);
                          });
                        },
                        value: SingingCharacter.New,
                        activeColor: Colors.red,
                      ),
                      Text(
                        "New",
                        style: TextStyle(fontSize: 13.0),
                      ),
                      Radio(
                        groupValue: _character,
                        onChanged: (SingingCharacter value) {
                          setState(() {
                            _character = value;
                            print(_character);
                          });
                        },
                        value: SingingCharacter.Repair,
                        activeColor: Colors.red,
                      ),
                      Text(
                        "Repair",
                        style: TextStyle(fontSize: 13.0),
                      ),
                      Radio(
                        groupValue: _character,
                        onChanged: (SingingCharacter value) {
                          setState(() {
                            _character = value;
                            print(_character.toString());
                          });
                        },
                        value: SingingCharacter.OnlyMachineChange,
                        activeColor: Colors.red,
                      ),
                      Text(
                        "Machine Change",
                        style: TextStyle(fontSize: 13.0),
                      ),
                    ],
                  ),
                  //******************************************** Machine Number  */
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Machine Number *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  ),
                  TextFormField(
                    decoration: InputDecoration(
                        labelText: "Well Block Party *",
                        labelStyle: TextStyle(
                            fontFamily: "Montserrat", color: Colors.black)),
                  )
                ],
              ),
            )
          ],
        ),
      ),
    );
  }

我遇到了类似这样的错误:

正在执行热重装...⣟ flutter :BY渲染库引起的异常CA ═════════════════════════
flutter :布局期间引发了以下断言:
抖动:RenderFlex在底部溢出158像素。
flutter :
flutter :相关的引起错误的小部件是:
flutter:列文件://://Users/baps/Projects/Flutter%20Projects/TRLApp/trlapp/lib/ladlePreheating.dart:64:16
flutter :
flutter :溢出的RenderFlex的方向为Axis.vertical。
抖动:溢出的RenderFlex边缘在渲染中用黄色和
flutter :黑色条纹。这通常是因为内容对于RenderFlex而言太大。
flutter :考虑应用 flex 系数(例如，使用扩展小部件)来强制
flutter :RenderFlex可以容纳在可用空间内，而不是按照其自然大小进行调整。
flutter :这被认为是错误情况，因为它表明存在不能被删除的内容
flutter :见过。如果内容合法大于可用空间，请考虑使用
flutter:将ClipRect小部件放入Flex之前，或使用可滚动容器而不是Flex，
flutter :像一个ListView。
flutter :有问题的特定RenderFlex是:RenderFlex＃4bdfd relayoutBoundary = up1溢出:
flutter :需要合成
flutter:创建者:列←容器←_BodyBuilder←MediaQuery←LayoutId-[<_ ScaffoldSlot.body>]←
flutter :CustomMultiChildLayout←AnimatedBuilder←DefaultTextStyle←AnimatedDefaultTextStyle←
flutter :_InkFeatures- [GlobalKey＃9c17c墨水渲染器]←NotificationListener←
flutter :PhysicalModel←⋯
flutter:parentData:offset = Offset(0.0，0.0); id = _ScaffoldSlot.body(可以使用大小)
flutter :约束:BoxConstraints(0.0 <= w <= 414.0，0.0 <= h <= 736.0)
flutter :大小:大小(414.0，736.0)
flutter :方向:垂直
flutter :mainAxisAlignment:开始
flutter :mainAxisSize:最大
flutter :crossAxisAlignment:中心
flutter :垂直方向:向下
flutter ◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤ ◢◤
flutter ══════════════════════════════════════════════════ ══

Answer 1

缺少将ScrollView as Column扩展为容器不知道需要占用多少空间，因此，它计算的大小大于屏幕大小。

因此，只需在其中扩展:

...
Expanded(
                child: SingleChildScrollView(
                  padding:...