这里我的列表视图不是滚动飞镖颤动，请帮助我我是颤振新手
here my listview is not scrolling dart flutter , please help me iam new to flutter
return Scaffold(
body: Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: Stack(
children: [
Positioned(
width: MediaQuery.of(context).size.width,
height: 25.0*SizeConfig.heightMultiplier,
child:Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [Color(0xff009cba), Color(0xff000e11)])
),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Expanded(flex:3,
child: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.end,
children: [
FittedBox(child: Text("Firm Details",style: GoogleFonts.lato(color: Color(0xfffbfbfb),fontSize: 1.6*SizeConfig.textMultiplier),/*TextStyle(color: Color(0xfffbfbfb),)*/)),
SizedBox(height: 0.5*SizeConfig.heightMultiplier,),
FittedBox(child: Text("Please select the category that best describes your business model.",style: GoogleFonts.lato(color: Color(0xffb3fbfbfb),fontSize: 1.3*SizeConfig.textMultiplier) /*TextStyle(color: Color(0xffb3fbfbfb),fontSize: 12.0)*/,)),
],
),
),
),
Expanded(flex:1,child:Container(
width: 10.0*SizeConfig.widthMultiplier,
height: 10.0*SizeConfig.heightMultiplier,
child:Image.asset("assets/images/firmDetail.png",width:1.0*SizeConfig.widthMultiplier,height: 1.0*SizeConfig.heightMultiplier,),
), ),
],
),
), ),
Positioned(
top:20.0*SizeConfig.heightMultiplier,
child:Container(
width: MediaQuery.of(context).size.width,
height: 500.0*SizeConfig.heightMultiplier,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(5.0*SizeConfig.widthMultiplier),
color: Colors.white,
),
child:new Container(
child: ListView(
scrollDirection: Axis.vertical,
children: <Widget>[
SizedBox(height: 2.0*SizeConfig.heightMultiplier,),
Center(child: Padding(
padding: EdgeInsets.all(1.8*SizeConfig.heightMultiplier),
child: Text("Please select the category that best describes your business model.",style: GoogleFonts.lato(fontWeight: FontWeight.bold),),
)),
horizontalList1,
verticalList, // here vertical list
],
),
),
),
),
],
),
),
);
在小部件垂直列表中，Listview 不滚动，但是当我们在具有固定高度的表单后添加 Sizedbox 时，它正在滚动，但我不需要滚动视图的固定高度
Widget verticalList = new Container(
margin: EdgeInsets.symmetric(vertical: 0*SizeConfig.heightMultiplier),
height: MediaQuery.of(context).size.height,
child:ListView(
shrinkWrap: true,
scrollDirection: Axis.vertical,
children: [
Form(
key: _formKey,
child:ListView(
shrinkWrap: true,
children: [
Padding(
padding:EdgeInsets.only(left:6.0*SizeConfig.widthMultiplier,right: 6.0*SizeConfig.widthMultiplier,top:1.8*SizeConfig.widthMultiplier,bottom: 1.8*SizeConfig.widthMultiplier),
child: new TextFormField(
validator: (String value) {
if (value.isEmpty) {
return 'PinCode';
} else {
return null;
}
},
keyboardType: TextInputType.phone,
controller: _pincode,
// selectionColor:Color(0xffe4065f),
style: GoogleFonts.lato(fontSize: 1.6*SizeConfig.textMultiplier,),
decoration: const InputDecoration(
labelText: "PinCode",
labelStyle: TextStyle(color: Color(0xffe4065f)),
focusColor: Color(0xffe4065f),
hintText:
"PinCode",
hintStyle: TextStyle(fontSize: 13.0),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xffe4065f))),
),
// style: Theme.of(context).textTheme.body1,
),
),
Padding(
padding:EdgeInsets.only(left:6.0*SizeConfig.widthMultiplier,right: 6.0*SizeConfig.widthMultiplier,top:1.8*SizeConfig.widthMultiplier,bottom: 1.8*SizeConfig.widthMultiplier),
child: new TextFormField(
validator: (String value) {
if (value.isEmpty) {
return 'PAN of the unit. is required';
} else {
return null;
}
},
keyboardType: TextInputType.text,
controller: _pan,
// selectionColor:Color(0xffe4065f),
style: GoogleFonts.lato(fontSize: 1.6*SizeConfig.textMultiplier,),
decoration: const InputDecoration(
labelText: "PAN of the unit",
labelStyle: TextStyle(color: Color(0xffe4065f)),
focusColor: Color(0xffe4065f),
hintText:
"PAN of the unit",
hintStyle: TextStyle(fontSize: 13.0),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xffe4065f))),
),
// style: Theme.of(context).textTheme.body1,
),
),
Padding(
padding:EdgeInsets.only(left:6.0*SizeConfig.widthMultiplier,right: 6.0*SizeConfig.widthMultiplier,top:1.8*SizeConfig.widthMultiplier,bottom: 1.8*SizeConfig.widthMultiplier),
child: FormField<String>(
builder: (FormFieldState<String> state) {
return InputDecorator(
decoration: InputDecoration(
labelText: "Constitution",
errorStyle: TextStyle(color: Colors.redAccent, fontSize: 1.6*SizeConfig.textMultiplier),
hintText: 'Please select expense',),
isEmpty: _constitutions == '',
child: DropdownButtonHideUnderline(
child: DropdownButton<String>(
value: _constitutions,
isDense: true,
onChanged: (String newValue) {
setState(() {
_constitutions = newValue;
state.didChange(newValue);
});
},
items: _constitution.map((String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value,style: GoogleFonts.lato(fontSize: 1.6*SizeConfig.textMultiplier,)),
);
}).toList(),
),
),
);
},
),
),
Padding(
padding:EdgeInsets.only(left:6.0*SizeConfig.widthMultiplier,right: 6.0*SizeConfig.widthMultiplier,top:1.8*SizeConfig.widthMultiplier,bottom: 1.8*SizeConfig.widthMultiplier),
child: new TextFormField(
validator: (String value) {
if (value.isEmpty) {
return 'Line of Activity is required';
} else {
return null;
}
},
keyboardType: TextInputType.text,
controller: _lineActicity,
// selectionColor:Color(0xffe4065f),
style: GoogleFonts.lato(fontSize: 1.6*SizeConfig.textMultiplier,),
decoration: const InputDecoration(
labelText: "Line of Activity",
labelStyle: TextStyle(color: Color(0xffe4065f)),
focusColor: Color(0xffe4065f),
hintText:
"Line of Activity",
hintStyle: TextStyle(fontSize: 13.0),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xffe4065f))),
),
// style: Theme.of(context).textTheme.body1,
),
),
Padding(
padding:EdgeInsets.only(
left: 1.0*SizeConfig.widthMultiplier,
right: 1.0*SizeConfig.widthMultiplier,
),
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
FlatButton(
onPressed: () {
//x _postData();
if (!_formKey.currentState.validate()) {
//_formKey.currentState.save();
if (_constitutions == null || _districtSelectedValue == null) {
print("eroore");
Flushbar(
message: "please select required fields",
duration: Duration(seconds: 3),
)..show(context);
} else {
// Every of the data in the form are valid at this point
_formKey.currentState.save();
print(_constitutions);
}
} else {
// submitOtp();
_postData();
}
},
child: Text(
"SAVE & NEXT",
style: GoogleFonts.lato(color: Colors.white),
),
color: Color(0xffe4065f),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8.0),
side: BorderSide(color: Color(0xffe4065f)),
),
),
],
),
),
],
),
),
// SizedBox(height: 1000,),
],
)
);
这里，当我们在具有固定高度的表单后添加 Sizedbox 时，它正在滚动，但我不需要固定高度的滚动视图，我是 flutter 的新手，请帮助
您可以使用 SingleChildScrollView 小部件
包装主小部件
您的列表视图包装在一个很长且没有滚动条的容器中。所以它不会滚动，因为列表适合那个长容器。
对于列表视图，您需要一个固定的高度。它是为列表的可见部分指定的固定高度。移除包装容器或降低高度，使其全部显示在屏幕上。
另外看看你对堆栈的使用。一旦您通过在文本“公司详细信息”等上方滚动的列表解决此问题，您可能会遇到问题。
我会建议一个简单的小部件层次结构，例如
Scaffold
- Container (For the red background)
- Column
- Container (with size for the lorem ipsom text.
- Lorem Ipso Text.
- Expanded (So that it will use the rest of the height automatically.)
- Container (with white back ground and top rounded borders. Makes sure you add circular borders only to top and not to bottom of this container.
- DefaultTabController
- builder (to get different context of the default tab controller if more than one is used in your full app.)
- Column
- TabBar (if the number of categories is large use scrolling here as a property of the tab bar.) wrap in container if you need specific height of the tab bar.
- Expanded
- TabBarView to show the appropriate form.
- SingleChildScrollView
-Column
-Your fields
return Scaffold(
body: Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: Stack(
children: [
Positioned(
width: MediaQuery.of(context).size.width,
height: 25.0*SizeConfig.heightMultiplier,
child:Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [Color(0xff009cba), Color(0xff000e11)])
),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Expanded(flex:3,
child: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.end,
children: [
FittedBox(child: Text("Firm Details",style: GoogleFonts.lato(color: Color(0xfffbfbfb),fontSize: 1.6*SizeConfig.textMultiplier),/*TextStyle(color: Color(0xfffbfbfb),)*/)),
SizedBox(height: 0.5*SizeConfig.heightMultiplier,),
FittedBox(child: Text("Please select the category that best describes your business model.",style: GoogleFonts.lato(color: Color(0xffb3fbfbfb),fontSize: 1.3*SizeConfig.textMultiplier) /*TextStyle(color: Color(0xffb3fbfbfb),fontSize: 12.0)*/,)),
],
),
),
),
Expanded(flex:1,child:Container(
width: 10.0*SizeConfig.widthMultiplier,
height: 10.0*SizeConfig.heightMultiplier,
child:Image.asset("assets/images/firmDetail.png",width:1.0*SizeConfig.widthMultiplier,height: 1.0*SizeConfig.heightMultiplier,),
), ),
],
),
), ),
Positioned(
top:20.0*SizeConfig.heightMultiplier,
child:Container(
width: MediaQuery.of(context).size.width,
height: 500.0*SizeConfig.heightMultiplier,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(5.0*SizeConfig.widthMultiplier),
color: Colors.white,
),
child:new Container(
child: ListView(
scrollDirection: Axis.vertical,
children: <Widget>[
SizedBox(height: 2.0*SizeConfig.heightMultiplier,),
Center(child: Padding(
padding: EdgeInsets.all(1.8*SizeConfig.heightMultiplier),
child: Text("Please select the category that best describes your business model.",style: GoogleFonts.lato(fontWeight: FontWeight.bold),),
)),
horizontalList1,
verticalList, // here vertical list
],
),
),
),
),
],
),
),
);
在小部件垂直列表中，Listview 不滚动，但是当我们在具有固定高度的表单后添加 Sizedbox 时，它正在滚动，但我不需要滚动视图的固定高度
Widget verticalList = new Container(
margin: EdgeInsets.symmetric(vertical: 0*SizeConfig.heightMultiplier),
height: MediaQuery.of(context).size.height,
child:ListView(
shrinkWrap: true,
scrollDirection: Axis.vertical,
children: [
Form(
key: _formKey,
child:ListView(
shrinkWrap: true,
children: [
Padding(
padding:EdgeInsets.only(left:6.0*SizeConfig.widthMultiplier,right: 6.0*SizeConfig.widthMultiplier,top:1.8*SizeConfig.widthMultiplier,bottom: 1.8*SizeConfig.widthMultiplier),
child: new TextFormField(
validator: (String value) {
if (value.isEmpty) {
return 'PinCode';
} else {
return null;
}
},
keyboardType: TextInputType.phone,
controller: _pincode,
// selectionColor:Color(0xffe4065f),
style: GoogleFonts.lato(fontSize: 1.6*SizeConfig.textMultiplier,),
decoration: const InputDecoration(
labelText: "PinCode",
labelStyle: TextStyle(color: Color(0xffe4065f)),
focusColor: Color(0xffe4065f),
hintText:
"PinCode",
hintStyle: TextStyle(fontSize: 13.0),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xffe4065f))),
),
// style: Theme.of(context).textTheme.body1,
),
),
Padding(
padding:EdgeInsets.only(left:6.0*SizeConfig.widthMultiplier,right: 6.0*SizeConfig.widthMultiplier,top:1.8*SizeConfig.widthMultiplier,bottom: 1.8*SizeConfig.widthMultiplier),
child: new TextFormField(
validator: (String value) {
if (value.isEmpty) {
return 'PAN of the unit. is required';
} else {
return null;
}
},
keyboardType: TextInputType.text,
controller: _pan,
// selectionColor:Color(0xffe4065f),
style: GoogleFonts.lato(fontSize: 1.6*SizeConfig.textMultiplier,),
decoration: const InputDecoration(
labelText: "PAN of the unit",
labelStyle: TextStyle(color: Color(0xffe4065f)),
focusColor: Color(0xffe4065f),
hintText:
"PAN of the unit",
hintStyle: TextStyle(fontSize: 13.0),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xffe4065f))),
),
// style: Theme.of(context).textTheme.body1,
),
),
Padding(
padding:EdgeInsets.only(left:6.0*SizeConfig.widthMultiplier,right: 6.0*SizeConfig.widthMultiplier,top:1.8*SizeConfig.widthMultiplier,bottom: 1.8*SizeConfig.widthMultiplier),
child: FormField<String>(
builder: (FormFieldState<String> state) {
return InputDecorator(
decoration: InputDecoration(
labelText: "Constitution",
errorStyle: TextStyle(color: Colors.redAccent, fontSize: 1.6*SizeConfig.textMultiplier),
hintText: 'Please select expense',),
isEmpty: _constitutions == '',
child: DropdownButtonHideUnderline(
child: DropdownButton<String>(
value: _constitutions,
isDense: true,
onChanged: (String newValue) {
setState(() {
_constitutions = newValue;
state.didChange(newValue);
});
},
items: _constitution.map((String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value,style: GoogleFonts.lato(fontSize: 1.6*SizeConfig.textMultiplier,)),
);
}).toList(),
),
),
);
},
),
),
Padding(
padding:EdgeInsets.only(left:6.0*SizeConfig.widthMultiplier,right: 6.0*SizeConfig.widthMultiplier,top:1.8*SizeConfig.widthMultiplier,bottom: 1.8*SizeConfig.widthMultiplier),
child: new TextFormField(
validator: (String value) {
if (value.isEmpty) {
return 'Line of Activity is required';
} else {
return null;
}
},
keyboardType: TextInputType.text,
controller: _lineActicity,
// selectionColor:Color(0xffe4065f),
style: GoogleFonts.lato(fontSize: 1.6*SizeConfig.textMultiplier,),
decoration: const InputDecoration(
labelText: "Line of Activity",
labelStyle: TextStyle(color: Color(0xffe4065f)),
focusColor: Color(0xffe4065f),
hintText:
"Line of Activity",
hintStyle: TextStyle(fontSize: 13.0),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xffe4065f))),
),
// style: Theme.of(context).textTheme.body1,
),
),
Padding(
padding:EdgeInsets.only(
left: 1.0*SizeConfig.widthMultiplier,
right: 1.0*SizeConfig.widthMultiplier,
),
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
FlatButton(
onPressed: () {
//x _postData();
if (!_formKey.currentState.validate()) {
//_formKey.currentState.save();
if (_constitutions == null || _districtSelectedValue == null) {
print("eroore");
Flushbar(
message: "please select required fields",
duration: Duration(seconds: 3),
)..show(context);
} else {
// Every of the data in the form are valid at this point
_formKey.currentState.save();
print(_constitutions);
}
} else {
// submitOtp();
_postData();
}
},
child: Text(
"SAVE & NEXT",
style: GoogleFonts.lato(color: Colors.white),
),
color: Color(0xffe4065f),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8.0),
side: BorderSide(color: Color(0xffe4065f)),
),
),
],
),
),
],
),
),
// SizedBox(height: 1000,),
],
)
);
这里，当我们在具有固定高度的表单后添加 Sizedbox 时，它正在滚动，但我不需要固定高度的滚动视图，我是 flutter 的新手，请帮助
您可以使用 SingleChildScrollView 小部件
包装主小部件您的列表视图包装在一个很长且没有滚动条的容器中。所以它不会滚动，因为列表适合那个长容器。 对于列表视图，您需要一个固定的高度。它是为列表的可见部分指定的固定高度。移除包装容器或降低高度，使其全部显示在屏幕上。
另外看看你对堆栈的使用。一旦您通过在文本“公司详细信息”等上方滚动的列表解决此问题，您可能会遇到问题。
我会建议一个简单的小部件层次结构，例如
Scaffold
- Container (For the red background)
- Column
- Container (with size for the lorem ipsom text.
- Lorem Ipso Text.
- Expanded (So that it will use the rest of the height automatically.)
- Container (with white back ground and top rounded borders. Makes sure you add circular borders only to top and not to bottom of this container.
- DefaultTabController
- builder (to get different context of the default tab controller if more than one is used in your full app.)
- Column
- TabBar (if the number of categories is large use scrolling here as a property of the tab bar.) wrap in container if you need specific height of the tab bar.
- Expanded
- TabBarView to show the appropriate form.
- SingleChildScrollView
-Column
-Your fields