我在手动输入地址布局中使用扩展图块，我发现存在溢出。我尝试使用三元运算符修复它，将其从 Expanded 调整为 SingleChildScrollView。我使用它的原因是，如果我使用 SingleChildScrollView，按钮将只在布局中显示一半，我们需要滚动它。我如何解决它？ 在此输入图片描述
下面是我的代码
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class Address extends StatefulWidget {
const Address({super.key});
@override
State<Address> createState() => _AddressState();
}
class _AddressState extends State<Address> {
FocusNode addressText = FocusNode();
bool _open = false;
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
centerTitle: true,
title: Container(
width: 200,
child: PreferredSize(
preferredSize: Size.fromHeight(10.0),
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Expanded(
child: LinearProgressIndicator(
value: 1, // Value for first step
backgroundColor: Color(0xD9D9D9D9),
valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
),
),
SizedBox(width: 7.0),
Expanded(
child: LinearProgressIndicator(
value: 1, // Value for second step
backgroundColor: Color(0xD9D9D9D9),
valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
),
),
SizedBox(width: 7.0),
Expanded(
child: LinearProgressIndicator(
value: 0.15, // Value for third step
backgroundColor: Color(0xD9D9D9D9),
valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
),
),
],
),
),
)
),
body: _open ? SingleChildScrollView(
child: Container(
// padding: EdgeInsets.symmetric(horizontal: 24.0,vertical: 12.0),
padding: EdgeInsets.all(30.0),
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height-1/9*(MediaQuery.of(context).size.height),
// height: MediaQuery.of(context).size.height,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Enter your address",style: TextStyle(fontSize: 22,fontFamily: "GraphikMedium"),),
SizedBox(height: 12,),
Text("Enter the street address of your primary residence. Please do not use a PO box or business address",
style: TextStyle(color: Colors.grey,fontSize: 16),),
SizedBox(height: 24,),
Text("Search for Address",style: TextStyle(fontSize: 16.0,fontFamily: "GraphikMedium",
color: addressText.hasFocus ? Colors.blue : Colors.black),
),
SizedBox(height: 8.0,),
Focus(
onFocusChange: (focus){
setState(() {});
},
child: TextFormField(
focusNode: addressText,
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue)
),
hintText: "Enter your address",
hintStyle: TextStyle(color: Colors.grey)
),
),
),
SizedBox(height: 40,),
SingleChildScrollView(
child: Theme(
data: Theme.of(context).copyWith(dividerColor: Colors.transparent),
child: ListTileTheme(
contentPadding: EdgeInsets.all(0),
dense: true,
child: ExpansionTile(
title: Text("Enter Address Manually",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
onExpansionChanged: (bool val) {
setState(() {
_open = val;
});
},
children: [
Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
SizedBox(height: 8.0,),
Text("Address line 1",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
TextFormField(
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
)
),
),
SizedBox(height: 8.0,),
Text("Address line 2 (optional)",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
TextFormField(
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
)
),
),
SizedBox(height: 8.0,),
Text("City",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
TextFormField(
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
)
),
),
SizedBox(height: 8.0,),
Text("City",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
TextFormField(
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
)
),
),
],
),
)
],
),
),
),
)
],
),
Container(
width: MediaQuery.of(context).size.width,
child: ElevatedButton(
onPressed: (){
Navigator.pushNamed(context, '/user-purpose');
},
child: Text(
"Continue",
style: TextStyle(
fontSize: 14.0,
fontWeight: FontWeight.normal,
color: Colors.white,
fontFamily: "GraphikMedium",
),
),
style: ButtonStyle(
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(borderRadius: BorderRadius.circular(5.0))
),
minimumSize: MaterialStateProperty.all(Size.fromHeight(60.0)),
backgroundColor: MaterialStateProperty.all(Colors.blue),
shadowColor: MaterialStateProperty.all(Colors.transparent)
),
),
)
],
),
),
) :
Expanded(
child: Container(
// padding: EdgeInsets.symmetric(horizontal: 24.0,vertical: 12.0),
padding: EdgeInsets.all(30.0),
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height-1/9*(MediaQuery.of(context).size.height),
// height: MediaQuery.of(context).size.height,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Enter your address",style: TextStyle(fontSize: 22,fontFamily: "GraphikMedium"),),
SizedBox(height: 12,),
Text("Enter the street address of your primary residence. Please do not use a PO box or business address",
style: TextStyle(color: Colors.grey,fontSize: 16),),
SizedBox(height: 24,),
Text("Search for Address",style: TextStyle(fontSize: 16.0,fontFamily: "GraphikMedium",
color: addressText.hasFocus ? Colors.blue : Colors.black),
),
SizedBox(height: 8.0,),
Focus(
onFocusChange: (focus){
setState(() {});
},
child: TextFormField(
focusNode: addressText,
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue)
),
hintText: "Enter your address",
hintStyle: TextStyle(color: Colors.grey)
),
),
),
SizedBox(height: 40,),
SingleChildScrollView(
child: Theme(
data: Theme.of(context).copyWith(dividerColor: Colors.transparent),
child: ListTileTheme(
contentPadding: EdgeInsets.all(0),
dense: true,
child: ExpansionTile(
title: Text("Enter Address Manually",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
onExpansionChanged: (bool val) {
setState(() {
_open = val;
});
},
children: [
Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
SizedBox(height: 8.0,),
Text("Address line 1",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
TextFormField(
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
)
),
),
SizedBox(height: 8.0,),
Text("Address line 2 (optional)",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
TextFormField(
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
)
),
),
SizedBox(height: 8.0,),
Text("City",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
TextFormField(
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
)
),
),
SizedBox(height: 8.0,),
Text("City",style: TextStyle(fontFamily: "GraphikRegular",fontSize: 16.0),),
TextFormField(
decoration: InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
)
),
),
],
),
)
],
),
),
),
)
],
),
Container(
width: MediaQuery.of(context).size.width,
child: ElevatedButton(
onPressed: (){
Navigator.pushNamed(context, '/user-purpose');
},
child: Text(
"Continue",
style: TextStyle(
fontSize: 14.0,
fontWeight: FontWeight.normal,
color: Colors.white,
fontFamily: "GraphikMedium",
),
),
style: ButtonStyle(
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(borderRadius: BorderRadius.circular(5.0))
),
minimumSize: MaterialStateProperty.all(Size.fromHeight(60.0)),
backgroundColor: MaterialStateProperty.all(Colors.blue),
shadowColor: MaterialStateProperty.all(Colors.transparent)
),
),
)
],
),
),
),
);
}
}
我认为我具有您正在寻找的行为，由 this 飞镖垫演示。
这个想法是，您希望
ContinueSingleChildScrollViewAppBarContinueExpanded