RenderCustomMultiChildLayoutBox object was given an infinite size during layout error
I keep getting the error as mentioned when I try to load LessonPage. What is happening is that I have a RootPage which checks if a user is signed in, if he is the RootPage will show the LessonPage but if he is not, it will show the LoginScreen which when the user logs in, will invoke a callback function to RootPage _onLoggedIn()so as to switch pages to the LessonPage.
Update: I found out that the error is also logged when I load the app (i.e. the app opens to a LoginScreen), however I see my login screen instead of a blank screen. I've appended my LoginScreen code below for reference
Root Page:
class RootPage extends StatefulWidget {
RootPage({this.auth});
final BaseAuth auth;
@override
State<StatefulWidget> createState() => new _RootPageState();
}
enum AuthStatus {
NOT_DETERMINED,
NOT_LOGGED_IN,
LOGGED_IN,
}
class _RootPageState extends State<RootPage> {
AuthStatus authStatus = AuthStatus.NOT_DETERMINED;
String _userId = "";
@override
void initState() {
super.initState();
widget.auth.getCurrentUser().then((user) {
setState(() {
if (user != null) {
_userId = user?.uid;
}
authStatus =
user?.uid == null ? AuthStatus.NOT_LOGGED_IN : AuthStatus.LOGGED_IN;
});
});
}
void _onLoggedIn() {
widget.auth.getCurrentUser().then((user){
setState(() {
_userId = user.uid.toString();
});
});
setState(() {
authStatus = AuthStatus.LOGGED_IN;
});
}
void _onSignedOut() {
setState(() {
authStatus = AuthStatus.NOT_LOGGED_IN;
_userId = "";
});
}
Widget _buildWaitingScreen() {
return Scaffold(
body: Container(
alignment: Alignment.center,
child:
ColorLoader5(
dotOneColor: Colors.blueGrey[600],
dotTwoColor: Colors.blueGrey[700],
dotThreeColor: Colors.blueGrey[800],
dotType: DotType.circle,
dotIcon: Icon(Icons.adjust),
duration: Duration(seconds: 1),
),
),
);
}
@override
Widget build(BuildContext context) {
switch (authStatus) {
case AuthStatus.NOT_DETERMINED:
return _buildWaitingScreen();
break;
case AuthStatus.NOT_LOGGED_IN:
return new LoginScreen(
auth: widget.auth,
onSignedIn: _onLoggedIn,
);
break;
case AuthStatus.LOGGED_IN:
if (_userId.length > 0 && _userId != null) {
return new Container(child: SingleChildScrollView(child: LessonPage(
title: LESSON_PAGE_TITLE,
userId: _userId,
auth: widget.auth,
onSignedOut: _onSignedOut,
)));
} else return _buildWaitingScreen();
break;
default:
return _buildWaitingScreen();
}
}
}
Lesson Page:
class LessonPage extends StatefulWidget {
LessonPage({Key key, this.auth, this.userId, this.onSignedOut, this.title}) : super(key: key);
final String title;
final BaseAuth auth;
final VoidCallback onSignedOut;
final String userId;
@override
_LessonPageState createState() => _LessonPageState();
}
class _LessonPageState extends State<LessonPage> {
List lessons;
@override
void initState() {
lessons = StaticMethods.getLessons();
super.initState();
}
@override
Widget build(BuildContext context) {
ListTile makeListTile(Lesson lesson) => ListTile(
contentPadding:
EdgeInsets.symmetric(horizontal: 20.0, vertical: 10.0),
leading: Container(
padding: EdgeInsets.only(right: 12.0),
decoration: new BoxDecoration(
border: new Border(
right: new BorderSide(width: 1.0, color: Colors.white24))),
child: IconButton(
icon: Icon(Icons.file_download, color: Colors.white),
onPressed: (){},
),
),
title: Text(
lesson.title,
style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
),
subtitle: Row(
children: <Widget>[
Expanded(
flex: 1,
child: Container(
child: LinearProgressIndicator(
backgroundColor: Color.fromRGBO(209, 224, 224, 0.2),
value: lesson.indicatorValue,
valueColor: AlwaysStoppedAnimation(Colors.green)),
)),
Expanded(
flex: 4,
child: Padding(
padding: EdgeInsets.only(left: 10.0),
child: Text(lesson.level,
style: TextStyle(color: Colors.white))),
)
],
),
trailing:
Icon(Icons.keyboard_arrow_right, color: Colors.white, size: 30.0),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DetailPage(lesson: lesson)));
},
);
Card makeCard(Lesson lesson) => Card(
elevation: 8.0,
margin: new EdgeInsets.symmetric(horizontal: 10.0, vertical: 6.0),
child: Container(
decoration: BoxDecoration(color: Color.fromRGBO(64, 75, 96, .9)),
child: makeListTile(lesson),
),
);
final makeBody = Container(
child: ListView.builder(
scrollDirection: Axis.vertical,
shrinkWrap: true,
itemCount: lessons.length,
itemBuilder: (BuildContext context, int index) {
return makeCard(lessons[index]);
},
),
);
final makeBottom = Container(
height: 55.0,
child: BottomAppBar(
color: Color.fromRGBO(58, 66, 86, 1.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
IconButton(
icon: Icon(Icons.school, color: Colors.white),
onPressed: () => StaticMethods.goToWidget(context, new LessonPage(title: LESSON_PAGE_TITLE)),
),
IconButton(
icon: Icon(Icons.flight_takeoff, color: Colors.white),
onPressed: () {},
),
IconButton(
icon: Icon(Icons.account_box, color: Colors.white),
onPressed: () {},
)
],
),
),
);
final topAppBar = AppBar(
elevation: 0.1,
backgroundColor: Color.fromRGBO(58, 66, 86, 1.0),
title: Text(widget.title),
automaticallyImplyLeading: false,
);
return Scaffold(
backgroundColor: Color.fromRGBO(58, 66, 86, 1.0),
appBar: topAppBar,
body: makeBody,
bottomNavigationBar: makeBottom,
);
}
}
LoginScreen Containers:
Widget OptionPage() {
return new Container(
height: MediaQuery.of(context).size.height,
decoration: BoxDecoration(
color: Color.fromRGBO(58, 66, 86, 1.0),
image: DecorationImage(
colorFilter: new ColorFilter.mode(
Colors.black.withOpacity(0.1), BlendMode.dstATop),
image: AssetImage('assets/images/drones.jpg'),
fit: BoxFit.cover,
),
),
child: new Column(
children: <Widget>[
Container(
padding: EdgeInsets.only(top: 250.0),
child: Center(
child: Icon(
Icons.school,
color: Colors.white,
size: 40.0,
),
),
),
Container(
padding: EdgeInsets.only(top: 20.0),
child: new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
LOGIN_SCREEN_TITLE,
style: TextStyle(
color: Colors.white,
fontSize: 20.0,
),
),
],
),
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 30.0, right: 30.0, top: 150.0),
alignment: Alignment.center,
child: new Row(
children: <Widget>[
new Expanded(
child: new OutlineButton(
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(30.0)),
color: Color.fromRGBO(58, 66, 86, 1.0),
highlightedBorderColor: Colors.white,
onPressed: () => gotoSignup(),
child: new Container(
padding: const EdgeInsets.symmetric(
vertical: 20.0,
horizontal: 20.0,
),
child: new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Expanded(
child: Text(
LOGIN_SCREEN_SIGN_UP,
textAlign: TextAlign.center,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold),
),
),
],
),
),
),
),
],
),
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 30.0, right: 30.0, top: 30.0),
alignment: Alignment.center,
child: new Row(
children: <Widget>[
new Expanded(
child: new FlatButton(
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(30.0)),
color: Colors.white,
onPressed: () => gotoLogin(),
child: new Container(
padding: const EdgeInsets.symmetric(
vertical: 20.0,
horizontal: 20.0,
),
child: new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Expanded(
child: Text(
LOGIN_SCREEN_LOGIN,
textAlign: TextAlign.center,
style: TextStyle(
color: Color.fromRGBO(58, 66, 86, 1.0),
fontWeight: FontWeight.bold),
),
),
],
),
),
),
),
],
),
),
],
),
);
}
Widget LoginPage() {
return new Container(
height: MediaQuery.of(context).size.height,
decoration: BoxDecoration(
color: Colors.white,
image: DecorationImage(
colorFilter: new ColorFilter.mode(
Colors.black.withOpacity(0.05), BlendMode.dstATop),
image: AssetImage('assets/images/drones.jpg'),
fit: BoxFit.cover,
),
),
child: new Column(
children: <Widget>[
Container(
padding: EdgeInsets.all(120.0),
child: Center(
child: Icon(
Icons.school,
color: Color.fromRGBO(58, 66, 86, 1.0),
size: 50.0,
),
),
),
new Row(
children: <Widget>[
new Expanded(
child: new Padding(
padding: const EdgeInsets.only(left: 40.0),
child: new Text(
LOGIN_SCREEN_EMAIL,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Color.fromRGBO(58, 66, 86, 1.0),
fontSize: 15.0,
),
),
),
),
],
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 40.0, right: 40.0, top: 10.0),
alignment: Alignment.center,
padding: const EdgeInsets.only(left: 0.0, right: 10.0),
child: new Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
new Expanded(
child: TextFormField( // LOGIN SCREEN EMAIL
maxLines: 1,
keyboardType: TextInputType.emailAddress,
autofocus: false,
textAlign: TextAlign.left,
decoration: InputDecoration(
icon: Icon(Icons.alternate_email),
hintText: LOGIN_SCREEN_EMAIL_HINT,
hintStyle: TextStyle(color: Colors.grey),
),
validator: (value) => value.isEmpty ? LOGIN_SCREEN_EMAIL_WARNING : null,
onSaved: (value) => _email = value,
),
),
],
),
),
Divider(
height: 24.0,
color: Color(0x00000000),
),
new Row(
children: <Widget>[
new Expanded(
child: new Padding(
padding: const EdgeInsets.only(left: 40.0),
child: new Text(
LOGIN_SCREEN_PASSWORD,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Color.fromRGBO(58, 66, 86, 1.0),
fontSize: 15.0,
),
),
),
),
],
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 40.0, right: 40.0, top: 10.0),
alignment: Alignment.center,
padding: const EdgeInsets.only(left: 0.0, right: 10.0),
child: new Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
new Expanded(
child: TextFormField( // LOGIN SCREEN PASSWORD
obscureText: true,
keyboardType: TextInputType.emailAddress,
maxLines: 1,
autofocus: false,
textAlign: TextAlign.left,
decoration: InputDecoration(
icon: Icon(Icons.lock_outline),
hintText: LOGIN_SCREEN_PASSWORD_HINT,
hintStyle: TextStyle(color: Colors.grey),
),
validator: (value) => value.isEmpty ? LOGIN_SCREEN_PASSWORD_WARNING : null,
onSaved: (value) => _password = value,
),
),
],
),
),
Divider(
height: 24.0,
color: Color(0x00000000),
),
new Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
Padding(
padding: const EdgeInsets.only(right: 20.0),
child: new FlatButton(
child: new Text(
LOGIN_SCREEN_FORGOT_PASSWORD,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Color.fromRGBO(58, 66, 86, 1.0),
fontSize: 15.0,
),
textAlign: TextAlign.end,
),
onPressed: () => StaticMethods.locked(context),
),
),
],
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 30.0, right: 30.0, top: 20.0),
alignment: Alignment.center,
child: new Row(
children: <Widget>[
new Expanded(
child: new FlatButton( // LOGIN SCREEN LOGIN BUTTON
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(30.0),
),
color: Color.fromRGBO(58, 66, 86, 1.0),
onPressed: () => _validateAndSubmit(),
child: new Container(
padding: const EdgeInsets.symmetric(
vertical: 20.0,
horizontal: 20.0,
),
child: new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Expanded(
child: Text(
LOGIN_SCREEN_LOGIN,
textAlign: TextAlign.center,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold),
),
),
],
),
),
),
),
],
),
),
Divider(
height: 25.0,
color: Color(0x00000000),
),
_showErrorMessage(),
Divider(
height: 25.0,
color: Color(0x00000000),
),
_showLoading(),
],
),
);
}
Widget SignupPage() {
return new Container(
height: MediaQuery.of(context).size.height,
decoration: BoxDecoration(
color: Colors.white,
image: DecorationImage(
colorFilter: new ColorFilter.mode(
Colors.black.withOpacity(0.05), BlendMode.dstATop),
image: AssetImage('assets/images/drones.jpg'),
fit: BoxFit.cover,
),
),
child: new Column(
children: <Widget>[
Container(
padding: EdgeInsets.all(100.0),
child: Center(
child: Icon(
Icons.school,
color: Color.fromRGBO(58, 66, 86, 1.0),
size: 50.0,
),
),
),
new Row(
children: <Widget>[
new Expanded(
child: new Padding(
padding: const EdgeInsets.only(left: 40.0),
child: new Text(
LOGIN_SCREEN_EMAIL,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Color.fromRGBO(58, 66, 86, 1.0),
fontSize: 15.0,
),
),
),
),
],
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 40.0, right: 40.0, top: 10.0),
alignment: Alignment.center,
padding: const EdgeInsets.only(left: 0.0, right: 10.0),
child: new Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
new Expanded(
child: TextField( //SIGNUP SCREEN EMAIL
obscureText: true,
textAlign: TextAlign.left,
decoration: InputDecoration(
hintText: LOGIN_SCREEN_EMAIL_HINT,
hintStyle: TextStyle(color: Colors.grey),
),
),
),
],
),
),
Divider(
height: 24.0,
color: Color(0x00000000),
),
new Row(
children: <Widget>[
new Expanded(
child: new Padding(
padding: const EdgeInsets.only(left: 40.0),
child: new Text(
LOGIN_SCREEN_PASSWORD,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Color.fromRGBO(58, 66, 86, 1.0),
fontSize: 15.0,
),
),
),
),
],
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 40.0, right: 40.0, top: 10.0),
alignment: Alignment.center,
padding: const EdgeInsets.only(left: 0.0, right: 10.0),
child: new Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
new Expanded(
child: TextField( // SIGNUP SCREEN PASSWORD
obscureText: true,
textAlign: TextAlign.left,
decoration: InputDecoration(
hintText: LOGIN_SCREEN_PASSWORD_HINT,
hintStyle: TextStyle(color: Colors.grey),
),
),
),
],
),
),
Divider(
height: 24.0,
color: Color(0x00000000),
),
new Row(
children: <Widget>[
new Expanded(
child: new Padding(
padding: const EdgeInsets.only(left: 40.0),
child: new Text( // SIGNUP SCREEN CONFIRM PASSWORD
LOGIN_SCREEN_CONFIRM_PASSWORD,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Color.fromRGBO(58, 66, 86, 1.0),
fontSize: 15.0,
),
),
),
),
],
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 40.0, right: 40.0, top: 10.0),
alignment: Alignment.center,
padding: const EdgeInsets.only(left: 0.0, right: 10.0),
child: new Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
new Expanded(
child: TextField(
obscureText: true,
textAlign: TextAlign.left,
decoration: InputDecoration(
hintText: LOGIN_SCREEN_PASSWORD_HINT,
hintStyle: TextStyle(color: Colors.grey),
),
),
),
],
),
),
Divider(
height: 24.0,
color: Color(0x00000000),
),
new Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
Padding(
padding: const EdgeInsets.only(right: 20.0),
child: new FlatButton(
child: new Text(
LOGIN_SCREEN_HAVE_ACCOUNT,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Color.fromRGBO(58, 66, 86, 1.0),
fontSize: 15.0,
),
textAlign: TextAlign.end,
),
onPressed: () => StaticMethods.locked(context),
),
),
],
),
new Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 30.0, right: 30.0, top: 50.0),
alignment: Alignment.center,
child: new Row(
children: <Widget>[
new Expanded(
child: new FlatButton( // SIGNUP SCREEN SIGN UP BUTTON
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(30.0),
),
color: Color.fromRGBO(58, 66, 86, 1.0),
onPressed: () => StaticMethods.locked(context),
child: new Container(
padding: const EdgeInsets.symmetric(
vertical: 20.0,
horizontal: 20.0,
),
child: new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Expanded(
child: Text(
LOGIN_SCREEN_SIGN_UP,
textAlign: TextAlign.center,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold),
),
),
],
),
),
),
),
],
),
),
],
),
);
}
PageController _controller = new PageController(initialPage: 1, viewportFraction: 1.0);
@override
Widget build(BuildContext context) {
_isIos = Theme.of(context).platform == TargetPlatform.iOS;
return Container(
height: MediaQuery.of(context).size.height,
width: MediaQuery.of(context).size.width,
child: new Form (
key: _formKey,
child: PageView(
controller: _controller,
physics: new AlwaysScrollableScrollPhysics(),
children: <Widget>[LoginPage(), OptionPage(), SignupPage()],
scrollDirection: Axis.horizontal,
onPageChanged: (num){
switch (num) {
case 0:
setState(() {
_formKey.currentState.reset();
_errorMessage = "";
_formMode = FormMode.LOGIN;
});
break;
case 1:
setState(() {
_formKey.currentState.reset();
_errorMessage = "";
_formMode = FormMode.OPTIONS;
});
break;
case 2:
setState(() {
_formKey.currentState.reset();
_errorMessage = "";
_formMode = FormMode.SIGNUP;
});
break;
}
},
),
),
);
}
Error:
I/flutter (18510): The following assertion was thrown during performLayout():
I/flutter (18510): RenderCustomMultiChildLayoutBox object was given an infinite size during layout.
.....
In the error, it shows just a blank page instead of lesson page, and checking firebase I can see that a user logs in so I think it is some layout issue.
What I've tried:
RootPage (I still saw a blank screen):
return new LessonPage(
title: LESSON_PAGE_TITLE,
userId: _userId,
auth: widget.auth,
onSignedOut: _onSignedOut,
);
I tried to return a normal page instead of lesson page which just shows a loading animation which is already tested and works but still I see a blank page:
return _buildWaitingScreen();
LessonPage (still see blank page):
Widget makeBody(BuildContext context) => Container(
height: MediaQuery.of(context).size.height / 1.5,
child: ListView.builder(
scrollDirection: Axis.vertical,
shrinkWrap: true,
itemCount: lessons.length,
itemBuilder: (BuildContext context, int index) {
return makeCard(lessons[index]);
},
),
);
return Scaffold(
backgroundColor: Color.fromRGBO(58, 66, 86, 1.0),
appBar: topAppBar,
body: makeBody(context),
bottomNavigationBar: makeBottom,
);
Rajdeep1 Answer
You dont need Container and SingleChildScrollView in below snippet:
return LessonPage(
title: LESSON_PAGE_TITLE,
userId: _userId,
auth: widget.auth,
onSignedOut: _onSignedOut,
);
If that didn't fix,
RenderCustomMultiChildLayoutBox object was given an infinite size during layout. means that you have used ListView or ScrollView or any other widget that has infinite size. In order to prevent this issue, wrap your makeBody list view with fixed size. If it is working you can use MediaQuery.of(context).size.height(gives device screen width) and adjest the size you want.
Ex:
Widget makeBody(BuildContext context) => Container(
height: MediaQuery.of(context).size.height / 1.5,
child: ListView.builder(
scrollDirection: Axis.vertical,
shrinkWrap: true,
itemCount: lessons.length,
itemBuilder: (BuildContext context, int index) {
return makeCard(lessons[index]);
},
),
);
and call the method: body: makeBody(context),
Fix in RootPage:
return new Container(
height: MediaQuery.of(context).size.height,
child: LessonPage(
title: LESSON_PAGE_TITLE,
userId: _userId,
auth: widget.auth,
onSignedOut: _onSignedOut,
)
);
BlasankaUser contributions licensed under CC BY-SA 3.0