I have code below in flutter and when i press on back arrow button it crashes the app and white screen appear however in appears by default in other pages and i implemented it in other pages manually ... can someone please tell me what is the problem here cuz i couldn't figure it out?
thanks in advance
// ignore_for_file: avoid_function_literals_in_foreach_calls, prefer_const_constructors, prefer_const_literals_to_create_immutables, use_key_in_widget_constructors, avoid_unnecessary_containers, curly_braces_in_flow_control_structures, sized_box_for_whitespace, deprecated_member_use, file_names
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:material_design_icons_flutter/material_design_icons_flutter.dart';
// ignore: unused_import
import 'package:google_fonts/google_fonts.dart';
import 'package:hexcolor/hexcolor.dart';
// ignore: unused_import
import 'package:localize_and_translate/localize_and_translate.dart';
import 'package:menu_app/About.dart';
void main() => runApp(HotDrinks());
class HotDrinks extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
var screenHeight = MediaQuery.of(context).size.height;
var screenWidth = MediaQuery.of(context).size.width;
Future<List<Widget>> createList() async {
List<Widget> items = <Widget>[];
String dataString = await rootBundle
.loadString(translator.translate("assets/hotDrinks.json"));
List<dynamic> dataJSON = jsonDecode(dataString);
dataJSON.forEach((object) {
String finalString = "";
List<dynamic> dataList = object["placeItems"];
dataList.forEach((item) {
finalString = finalString + item + " | ";
});
items.add(Padding(
padding: EdgeInsets.all(2.0),
child: Container(
decoration: BoxDecoration(
color: Color.fromRGBO(255, 255, 255, 0.7),
borderRadius: BorderRadius.all(Radius.circular(10.0)),
boxShadow: [
BoxShadow(
color: Colors.black12,
spreadRadius: 2.0,
blurRadius: 5.0),
]),
margin: EdgeInsets.all(5.0),
child: Column(
mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
ClipRRect(
child: Image.asset(
object["placeImage"],
fit: BoxFit.cover,
width: 280,
height: 180,
),
),
SizedBox(
width: 250,
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
translator.translate(object["placeName"]),
style: GoogleFonts.elMessiri(
textStyle: TextStyle(
fontSize: 15.0, color: Colors.black54)),
),
Text(
translator.translate(" ${object["minOrder"]} IQD"),
style:
TextStyle(fontSize: 12.0, color: Colors.black54),
)
],
),
),
)
],
),
),
));
});
return items;
}
return Scaffold(
appBar: AppBar(
backgroundColor: HexColor("#242424"),
leading: IconButton(
icon: Icon(Icons.arrow_back_ios),
iconSize: 20.0,
onPressed: () {
Navigator.pop(context); //not working
},
),
title: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Image.asset(
"assets/images/logo.png",
fit: BoxFit.contain,
height: 40,
),
],
),
),
body: SafeArea(
child: SingleChildScrollView(
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisSize: MainAxisSize.min, // set min
children: <Widget>[
Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/images/backg.png"),
fit: BoxFit.cover,
),
),
height: 3000,
width: screenWidth,
child: FutureBuilder<List<Widget>>(
initialData: [Text("")],
future: createList(),
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting)
return Text("Loading");
if (snapshot.hasError) {
return Text("Error ${snapshot.error}");
}
if (snapshot.hasData) {
return Padding(
padding: EdgeInsets.all(8.0),
child: GridView.count(
childAspectRatio: 1, // items' width/height
crossAxisCount: 2,
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
children: [
// ignore: sdk_version_ui_as_code
...?snapshot.data,
],
));
} else {
return CircularProgressIndicator();
}
}),
)
],
),
)),
floatingActionButton: FloatingActionButton(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => About()),
);
},
backgroundColor: Colors.black,
child: Icon(
MdiIcons.information,
color: Colors.white,
)),
);
}
}