Проблема с прокруткой Flutter - RenderFlex переполнен 192 пикселями внизу
Я создаю форму с 4-5 полями формы. Однако, когда я пытаюсь ввести данные, появляется следующая ошибка.
Performing hot reload...
Syncing files to device sdk gphone x86 64...
Reloaded 3 of 512 libraries in 363ms.
W/IInputConnectionWrapper(21437): getTextBeforeCursor on inactive InputConnection
W/IInputConnectionWrapper(21437): getSelectedText on inactive InputConnection
W/IInputConnectionWrapper(21437): getTextAfterCursor on inactive InputConnection
W/IInputConnectionWrapper(21437): beginBatchEdit on inactive InputConnection
W/IInputConnectionWrapper(21437): endBatchEdit on inactive InputConnection
════════ Exception caught by rendering library ═════════════════════════════════════════════════════
The following assertion was thrown during layout:
A RenderFlex overflowed by 192 pixels on the bottom.
The relevant error-causing widget was:
Column file:///C:/Users/xyz/Documents/quizmaker/lib/views/signup.dart:54:20
The overflowing RenderFlex has an orientation of Axis.vertical.
The edge of the RenderFlex that is overflowing has been marked in the rendering with a yellow and black striped pattern. This is usually caused by the contents being too big for the RenderFlex.
Consider applying a flex factor (e.g. using an Expanded widget) to force the children of the RenderFlex to fit within the available space instead of being sized to their natural size.
This is considered an error condition because it indicates that there is content that cannot be seen. If the content is legitimately bigger than the available space, consider clipping it with a ClipRect widget before putting it in the flex, or using a scrollable container rather than a Flex, like a ListView.
The specific RenderFlex in question is: RenderFlex#322a5 relayoutBoundary=up2 OVERFLOWING
... needs compositing
... parentData: offset=Offset(24.0, 0.0) (can use size)
... constraints: BoxConstraints(0.0<=w<=363.4, 0.0<=h<=321.1)
... size: Size(363.4, 321.1)
... direction: vertical
... mainAxisAlignment: start
... mainAxisSize: min
... crossAxisAlignment: start
... textDirection: ltr
... verticalDirection: down
◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤
════════════════════════════════════════════════════════════════════════════════════════════════════
Вот мой код
import 'package:flutter/material.dart';
import 'package:quizmaker/services/auth.dart';
import 'package:quizmaker/views/home.dart';
import 'package:quizmaker/views/signin.dart';
import 'package:quizmaker/widgets/widgets.dart';
class SignUp extends StatefulWidget {
@override
_SignUpState createState() => _SignUpState();
}
class _SignUpState extends State<SignUp> {
final _formKey = GlobalKey<FormState>();
String sName, fName, lName, email, phone, password;
AuthService authService = new AuthService();
bool _isLoading = false;
signUp() async {
if(_formKey.currentState.validate()){
setState(() {
_isLoading = true;
});
authService.signUpWithEmailAndPass(email, password).then((value){
if(value != null){
setState(() {
_isLoading = false;
});
Navigator.pushReplacement(context, MaterialPageRoute(
builder: (context) => Home()
));
}
});
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: appBar(context),
centerTitle: true,
backgroundColor: Colors.transparent,
elevation: 0.0,
brightness: Brightness.light,
),
body: _isLoading ? Container(
child: Center(child: CircularProgressIndicator(),),
) : Form(
key: _formKey,
child: Container(
padding: EdgeInsets.symmetric(horizontal: 24),
child: Container(
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Spacer(),
TextFormField(
validator: (val){
return val.isEmpty ? "Enter School Name" : null ;
} ,
decoration: InputDecoration(
hintText: "School Name"
),
onChanged: (val){
sName = val;
},
),
SizedBox(height: 6,),
TextFormField(
validator: (val){
return val.isEmpty ? "Enter First Name" : null ;
} ,
decoration: InputDecoration(
hintText: "First Name"
),
onChanged: (val){
fName = val;
},
),
SizedBox(height: 6,),
TextFormField(
validator: (val){
return val.isEmpty ? "Enter Last Name" : null ;
} ,
decoration: InputDecoration(
hintText: "Last Name"
),
onChanged: (val){
lName = val;
},
),
SizedBox(height: 6,),
TextFormField(
validator: (val){
return val.isEmpty ? "Enter Emailid" : null ;
} ,
decoration: InputDecoration(
hintText: "Email"
),
onChanged: (val){
email = val;
},
),
SizedBox(height: 6,),
TextFormField(
validator: (val){
return val.isEmpty ? "Enter Phone Number" : null ;
} ,
decoration: InputDecoration(
hintText: "Phone"
),
onChanged: (val){
phone = val;
},
),
SizedBox(height: 6,),
TextFormField(
obscureText: true,
validator: (val){
return val.isEmpty ? "Enter Password" : null ;
} ,
decoration: InputDecoration(
hintText: "Password"
),
onChanged: (val){
password = val;
},
),
SizedBox(height: 24,),
GestureDetector(
onTap: (){
signUp();
},
child: Container(
padding: EdgeInsets.symmetric(vertical: 18),
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.circular(30)
),
alignment: Alignment.center,
width: MediaQuery.of(context).size.width - 48,
child: Text("Register", style: TextStyle(color: Colors.white, fontSize: 16),),
),
),
SizedBox(height: 18,),
Row(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text("Already have an account? ", style: TextStyle(fontSize: 15.5),),
GestureDetector(
onTap: (){
Navigator.pushReplacement(context, MaterialPageRoute(
builder: (context) => SignIn()
));
},
child: Text("Sign in", style: TextStyle(fontSize: 15.5, decoration: TextDecoration.underline),))
],
),
SizedBox(height: 80,),
],
),
),
),
),
);;
}
}
Я пробовал добавить к дочерним элементам Expanded, это устраняет ошибку, но поля формы становятся очень маленькими при вводе данных. Пробовал обернуть столбец в SingleChildScrollView, но он дает мне ниже
Дочерние элементы RenderFlex имеют ненулевой изгиб, но входящие ограничения по высоте не ограничены
Может ли кто-нибудь подсказать, что я делаю не так?
Спасибо!
2 ответа
Решение
Вам нужно обернуть свой виджет формы в SingleChildScrollView. Также обратите внимание, что после добавления SingleChildScrollView высота исправления отсутствует, поэтому вы не можете использовать виджет-разделитель. Вместо этого вы можете использовать виджет SizedBox, чтобы освободить место выше.
final _formKey = GlobalKey<FormState>();
String sName, fName, lName, email, phone, password;
AuthService authService = new AuthService();
bool _isLoading = false;
signUp() async {
if (_formKey.currentState.validate()) {
setState(() {
_isLoading = true;
});
authService.signUpWithEmailAndPass(email, password).then((value) {
if (value != null) {
setState(() {
_isLoading = false;
});
Navigator.pushReplacement(
context, MaterialPageRoute(builder: (context) => Home()));
}
});
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: appBar(context),
centerTitle: true,
backgroundColor: Colors.transparent,
elevation: 0.0,
brightness: Brightness.light,
),
body: _isLoading
? Container(
child: Center(
child: CircularProgressIndicator(),
),
)
: SingleChildScrollView(
child: Form(
key: _formKey,
child: Container(
padding: EdgeInsets.symmetric(horizontal: 24),
child: Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
// here you can't use spacer because their is no fix height, so you have to use SixedBox give some spacing
SizedBox(
height: 50,
),
TextFormField(
validator: (val) {
return val.isEmpty ? "Enter School Name" : null;
},
decoration: InputDecoration(hintText: "School Name"),
onChanged: (val) {
sName = val;
},
),
SizedBox(
height: 6,
),
TextFormField(
validator: (val) {
return val.isEmpty ? "Enter First Name" : null;
},
decoration: InputDecoration(hintText: "First Name"),
onChanged: (val) {
fName = val;
},
),
SizedBox(
height: 6,
),
TextFormField(
validator: (val) {
return val.isEmpty ? "Enter Last Name" : null;
},
decoration: InputDecoration(hintText: "Last Name"),
onChanged: (val) {
lName = val;
},
),
SizedBox(
height: 6,
),
TextFormField(
validator: (val) {
return val.isEmpty ? "Enter Emailid" : null;
},
decoration: InputDecoration(hintText: "Email"),
onChanged: (val) {
email = val;
},
),
SizedBox(
height: 6,
),
TextFormField(
validator: (val) {
return val.isEmpty ? "Enter Phone Number" : null;
},
decoration: InputDecoration(hintText: "Phone"),
onChanged: (val) {
phone = val;
},
),
SizedBox(
height: 6,
),
TextFormField(
obscureText: true,
validator: (val) {
return val.isEmpty ? "Enter Password" : null;
},
decoration: InputDecoration(hintText: "Password"),
onChanged: (val) {
password = val;
},
),
SizedBox(
height: 24,
),
GestureDetector(
onTap: () {
signUp();
},
child: Container(
padding: EdgeInsets.symmetric(vertical: 18),
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.circular(30)),
alignment: Alignment.center,
width: MediaQuery.of(context).size.width - 48,
child: Text(
"Register",
style:
TextStyle(color: Colors.white, fontSize: 16),
),
),
),
SizedBox(
height: 18,
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text(
"Already have an account? ",
style: TextStyle(fontSize: 15.5),
),
GestureDetector(
onTap: () {
Navigator.pushReplacement(
context,
MaterialPageRoute(
builder: (context) => SignIn()));
},
child: Text(
"Sign in",
style: TextStyle(
fontSize: 15.5,
decoration: TextDecoration.underline),
))
],
),
SizedBox(
height: 80,
),
],
),
),
),
),
),
);
}
}