如何解决错误未处理异常[177]堆栈溢出
因此，我不熟悉并尝试观看此视频。 （实际上，我几乎完蛋了），在视频中，讲师曾经尝试捕获语句，以作为发生错误时的示例。它确实对他有效，但对我无效。所以我删除了try and catch，因为它以前那样工作，但是我无法找回当时的陈述，并且陷入了以前尝试和今天遇到的错误。这是我在world_time类上的代码
import 'package:http/http.dart';
import 'dart:convert';
class WorldTime {
String location;
String time;
String flag;
String url;
WorldTime({this.location,this.flag,this.url});
Future<void> getTime() async {
Response response = await get('http://worldtimeapi.org/api/timezone/$url');
Map data = jsonDecode(response.body);
//print(data);
String datetime = data['datetime'];
String offset = data['utc_offset'].substring(1,3);
//print(datetime);
//print(offset);
DateTime now = DateTime.parse(datetime);
now = now.add(Duration(hours: int.parse(offset)));
time = now.toString();
}
WorldTime instance =
WorldTime(location: 'Berlin',flag: 'germany.png',url: 'Europe/Berlin');
}
这是我在加载应用中的代码
import 'package:flutter/material.dart';
import 'package:worldtime_app/service/world_time.dart';
class Loading extends StatefulWidget {
@override
_LoadingState createState() => _LoadingState();
}
class _LoadingState extends State<Loading> {
String time = 'loading';
void setupworldtime() async {
WorldTime instance = WorldTime(
location: 'Berlin',url: 'Europe/Berlin');
await instance.getTime();
print(instance.time);
setState(() {
time = instance.time;
});
}
@override
void initState() {
super.initState();
setupworldtime();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Padding(
padding: EdgeInsets.all(50.0),child: Text(time),),);
}
}
我的家庭班代码：
import 'package:flutter/material.dart';
class Home extends StatefulWidget {
@override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Column(
children: <Widget>[
FlatButton.icon(
onPressed: () {
Navigator.pushNamed(context,'/Choose_Location');
},icon: Icon(Icons.edit_location),label: Text("Choose Location"),],);
}
}
还有我在Choose_Location类上的代码：
import 'package:flutter/material.dart';
class Choose_Location extends StatefulWidget {
@override
_Choose_LocationState createState() => _Choose_LocationState();
}
class _Choose_LocationState extends State<Choose_Location> {
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.grey[200],appBar: AppBar(
backgroundColor: Colors.blue[900],title: Text('Choose a Location'),centerTitle: true,elevation: 0,body: RaisedButton(
onPressed: () {
setState(() {});
},);
}
}
我的主要班级：
import 'package:flutter/material.dart';
import 'package:worldtime_app/pages/Home.dart';
import 'package:worldtime_app/pages/Loading.dart';
import 'package:worldtime_app/pages/Choose_Location.dart';
void main() => runApp(MaterialApp(
initialRoute: '/',routes: {
'/': (context) => Loading(),'/Home': (context) => Home(),'/Choose_Location': (context) => Choose_Location(),},));
我在pubspec.yaml依赖项中使用http：^ 0.12.2。
该应用程序的目的是使用Dart作为一种语言，使世界范围内的应用变得扑朔迷离。
这是我得到的错误。
Performing hot restart...
Syncing files to device CPH1803...
Restarted application in 36,026ms.
E/flutter (29658): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: Stack Overflow
E/flutter (29658): #0 new WorldTime (package:worldtime_app/service/world_time.dart:10:3)
E/flutter (29658): #1 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #2 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #3 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #4 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #5 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #6 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #7 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #8 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #9 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #10 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #11 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #12 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #13 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #14 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #15 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #16 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #17 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #18 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #19 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #20 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #21 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #22 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #23 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #24 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #25 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #26 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #27 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #28 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #29 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #30 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #31 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #32 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #33 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #34 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #35 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #36 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #37 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #38 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #39 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #40 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #41 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #42 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): #43 new WorldTime (package:worldtime_app/service/world_time.dart:33:24)
E/flutter (29658): ...
E/flutter (29658): ...
E/flutter (29658): #6738 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18)
E/flutter (29658): #6739 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4652:16)
E/flutter (29658): #6740 Element.rebuild (package:flutter/src/widgets/framework.dart:4343:5)
E/flutter (29658): #6741 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4606:5)
E/flutter (29658): #6742 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4601:5)
E/flutter (29658): #6743 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14)
E/flutter (29658): #6744 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18)
E/flutter (29658): #6745 ComponentElement.performRebuild
希望您能为我提供帮助，如果对我的问题有任何疑问，请提出要求以容纳您并回答我的问题。谢谢
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