【发布时间】：2020-04-25 15:26:38
【问题描述】：
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)),
)
],
),
)
],
),
),
);
}
我得到了类似这样的错误：
正在执行热重新加载... ════════════════════════════ 颤振：在布局期间抛出了以下断言： flutter：一个 RenderFlex 在底部溢出了 158 个像素。 扑： 颤振：相关的导致错误的小部件是： 颤振：列文件：//Users/baps/Projects/Flutter%20Projects/TRLApp/trlapp/lib/ladlePreheating.dart:64:16 扑： 颤动：溢出的 RenderFlex 具有 Axis.vertical 的方向。 flutter: RenderFlex 溢出的边缘在渲染中已经用黄色和 颤动：黑色条纹图案。这通常是由于内容对于 RenderFlex 来说太大了。 颤振：考虑应用弹性因子（例如使用扩展小部件）来强制 颤振：RenderFlex 适应可用空间，而不是按其自然大小调整大小。 flutter：这被认为是错误情况，因为它表明有内容不能被 扑：见过。如果内容合法地大于可用空间，请考虑使用 flutter: ClipRect 小部件在放入 flex 之前，或者使用可滚动容器而不是 Flex， 颤动：就像一个 ListView。 颤振：有问题的具体 RenderFlex 是：RenderFlex#4bdfd relayoutBoundary=up1 OVERFLOWING： 颤振：需要合成 颤振：创建者：列 ← 容器 ← _BodyBuilder ← MediaQuery ← LayoutId-[<_scaffoldslot.body>] ← 颤振：CustomMultiChildLayout ← AnimatedBuilder ← DefaultTextStyle ← AnimatedDefaultTextStyle ← 颤振：_InkFeatures-[GlobalKey#9c17c 墨迹渲染器] ← NotificationListener ← 颤振：物理模型←⋯ 颤振：父数据：偏移=偏移（0.0，0.0）； id=_ScaffoldSlot.body（可以使用大小） 颤振：约束：BoxConstraints(0.0
【问题讨论】：
-
您尝试过热重启吗？
-
另外请移除列小部件中的标题栏或堆栈小部件，您可以在appbar中自行添加。即使它是定制的。
标签： flutter dart cross-platform