Navigator.pop(context) showing blank
128
Try below code hope its help to you. set rootNavigator: true
Refer Naviagtion here , here, here
Navigator.of(
context,
rootNavigator: true,
).pop(
context,
);
Or try below solution also
Navigator.pop(context);
Full Code:
import 'package:flutter/material.dart';
void main() {
runApp(const MaterialApp(
title: 'Navigation Basics',
home: FirstRoute(),
));
}
class FirstRoute extends StatelessWidget {
const FirstRoute({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('First Route'),
),
body: Center(
child: ElevatedButton(
child: const Text('Open route'),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => const SecondRoute()),
);
},
),
),
);
}
}
class SecondRoute extends StatefulWidget {
const SecondRoute({Key? key}) : super(key: key);
@override
State<SecondRoute> createState() => _SecondRouteState();
}
class _SecondRouteState extends State<SecondRoute> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("Second Route"),
),
body: Center(
child: ElevatedButton(
onPressed: () {
Navigator.pop(context);
},
child: const Text('Go back!'),
),
),
);
}
}
Test this code here
Author by
Olamilekan Adeyemi
Updated on January 02, 2023Comments
-
Olamilekan Adeyemi over 1 year
I was trying to navigate back to the first Screen using Navigator.pop(context), but instead it shows a blank screen instead of going back to the first screen. How do i fix this
import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; import 'package:font_awesome_flutter/font_awesome_flutter.dart'; import 'GenderButton.dart'; import 'constants.dart'; import 'buttons.dart'; import 'resultpage.dart'; class HomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Center(child: Text('')), elevation: 0, actions: [ IconButton( onPressed: () {}, icon: Icon( Icons.add_alert_sharp, size: 35, )) ], leading: IconButton( onPressed: () {}, icon: Icon( Icons.add, size: 35, ), ), ), body: HomeScreen()); } } class HomeScreen extends StatefulWidget { @override _HomeScreenState createState() => _HomeScreenState(); } class _HomeScreenState extends State<HomeScreen> { Gender SelectedGender = Gender.empty; @override Widget build(BuildContext context) { return Column( children: [ //BMI Calculator Header Row( children: [ SizedBox( width: 30, ), Text( 'BMI Calculator', style: TextStyle(fontSize: 30, fontWeight: FontWeight.bold), ), ], ), SizedBox( height: 20, ), //Gender Text Row( children: [ SizedBox( width: 25, ), Text( 'Gender', style: TextStyle(fontSize: 17), ), ], ), SizedBox( height: 10, ), //Button Widget Row( children: [ SizedBox( width: 25, ), BoxButton( Type: 'MALE', BorderColor: SelectedGender == Gender.male ? activeCardColor : inactiveCardColor, IconColor: SelectedGender == Gender.male ? activeCardColor : inactiv, OnPress: () { setState(() { SelectedGender = Gender.male; }); }, ), SizedBox( width: 15, ), BoxButton( Type: 'FEMALE', BorderColor: SelectedGender == Gender.female ? activeCardColor : inactiveCardColor, IconColor: SelectedGender == Gender.female ? activeCardColor : inactiv, OnPress: () { setState(() { SelectedGender = Gender.female; }); }, ), ], ), SizedBox( height: 20, ), //Weight Text Row( children: [ SizedBox( width: 25, ), //Weight Text Text( 'Weight', style: TextStyle(fontSize: 15), ) ], ), SizedBox( height: 5, ), Row( children: [ SizedBox( width: 25, ), Container( decoration: BoxDecoration( color: Colors.white, borderRadius: BorderRadius.circular(8)), // margin: EdgeInsets.all(15), height: 50, width: 250, child: Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [ RoundedIconButton( icon: FontAwesomeIcons.minus, onPressed: () { setState(() { Weight--; }); }, ), SizedBox( width: 55, ), Text( Weight.toString(), style: TextStyle( color: Colors.black, fontSize: 20, fontWeight: FontWeight.bold), ), SizedBox( width: 50, ), RoundedIconButton( icon: FontAwesomeIcons.plus, onPressed: () { setState(() { Weight++; }); }, ) ], ), ), SizedBox( width: 10, ), Container( height: 50, width: 100, decoration: BoxDecoration( color: Colors.white, borderRadius: BorderRadius.circular(9)), ) ], ), SizedBox( height: 20, ), //Height Text Row( children: [ SizedBox( width: 25, ), Text( 'Height', style: TextStyle(fontSize: 15), ) ], ), Row( children: [ SizedBox( width: 25, ), Container( decoration: BoxDecoration( color: Colors.white, borderRadius: BorderRadius.circular(8)), // margin: EdgeInsets.all(15), height: 50, width: 250, child: Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [ RoundedIconButton( icon: FontAwesomeIcons.minus, onPressed: () { setState(() { Height--; }); }, ), SizedBox( width: 55, ), Text( Height.toString(), style: TextStyle( color: Colors.black, fontSize: 20, fontWeight: FontWeight.bold), ), SizedBox( width: 50, ), RoundedIconButton( icon: FontAwesomeIcons.plus, onPressed: () { setState(() { Height++; }); }, ) ], ), ), SizedBox( width: 10, ), Container( height: 50, width: 100, decoration: BoxDecoration( color: Colors.white, borderRadius: BorderRadius.circular(9)), ) ], ), SizedBox( height: 20, ), Row( children: [ SizedBox( width: 25, ), Text( 'Age', style: TextStyle(fontSize: 18), ) ], ), SizedBox( height: 5, ), Container( decoration: BoxDecoration( color: Colors.white, borderRadius: BorderRadius.circular(8)), height: 50, width: 369, child: Container( // margin: EdgeInsets.all(15), height: 50, width: 250, child: Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [ RoundedIconButton( icon: FontAwesomeIcons.minus, onPressed: () { setState(() { Age--; }); }, ), SizedBox( width: 100, ), Text( Age.toString(), style: TextStyle( color: Colors.black, fontSize: 20, fontWeight: FontWeight.bold), ), SizedBox( width: 110, ), RoundedIconButton( icon: FontAwesomeIcons.plus, onPressed: () { setState(() { Age++; }); }, ) ], ), ), ), SizedBox( height: 20, ), GestureDetector( onTap: () { Navigator.push(context, MaterialPageRoute(builder: (context) { return ResultPage(); })); }, child: Container( decoration: BoxDecoration( color: Color(0xFF06C46C), borderRadius: BorderRadius.circular(8)), height: 50, width: 369, child: Center( child: Text( 'Calculate', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold), )), ), ), ], ); } }
SCREEN 2
import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; class ResultPage extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( theme: ThemeData.dark().copyWith( scaffoldBackgroundColor: Colors.black, textTheme: TextTheme( bodyText2: TextStyle(color: Colors.white), ), colorScheme: ColorScheme.light( primary: Colors.black, secondary: Colors.black)), home: Scaffold( appBar: AppBar( title: Center(child: Text('')), elevation: 0, actions: [ IconButton( onPressed: () {}, icon: Icon( Icons.add_alert_sharp, size: 35, )) ], leading: IconButton( onPressed: () {}, icon: Icon( Icons.add, size: 35, ), ), ), body: Results()), ); } } class Results extends StatefulWidget { @override _ResultsState createState() => _ResultsState(); } class _ResultsState extends State<Results> { @override Widget build(BuildContext context) { return Container( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Text( 'Result', style: TextStyle(fontSize: 30), ), Center( child: Container( decoration: BoxDecoration( color: Color(0xFF333335), borderRadius: BorderRadius.circular(8)), margin: EdgeInsets.all(10), height: 300, width: 350, ), ), Center( child: Container( margin: EdgeInsets.all(35), child: Text('For your height , a normal would be from 48.6 ' 'to 63.3 kilograms'), ), ), GestureDetector( onTap: () { Navigator.pop(context); }, child: Container( decoration: BoxDecoration( color: Color(0xFF06C46C), borderRadius: BorderRadius.circular(8)), height: 50, width: 369, child: Center( child: Text( 'Recalculate BMI', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold), )), ), ), ], ), ); } }
and also if you look at how i position all my widget to get same styling of a design i saw on dribble enter link description here am doing it right ? because i feel like i am doing it the wrong way and am still a beginner and i was trying to recreate what i learnt from a course i bought on udemy?
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Olamilekan Adeyemi over 2 yearsHello Thanks for the reply i figured why it was returning a blank page , it was because i was using a stateful widget instead of stateless. and if you look at how i style my widgets it it good that way or how do i improve on that
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Ravindra S. Patil over 2 yearsThis is not necessary to used which widget I was try this also Stateful widget also. check my updated answer
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Olamilekan Adeyemi over 2 yearsIt's working fine now