【发布时间】：2021-12-31 12:34:27
【问题描述】：
我对今天开始的 Flutter/Android 工作室有疑问。
Mainaxisalignment 未显示正确的格式
“标题距离”而不是“标题距离”
我认为我没有更改任何代码，但可能是 pub get/upgrade，...我的提供程序也有问题（我说的是 Firebase 身份验证的提供程序）。
这是一个全新的项目，只有这个 Dart 文件，同样的问题。 VS-Code 中同样的问题
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
String title = "title";
String value1 = "distance";
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: FittedBox(
fit: BoxFit.fitWidth,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(title),
Text(value1),
],
),
),
actions: <Widget>[
if (title != 'Settings' ) //|| title != 'Laatste Minuut Risico Analyse'
IconButton(
icon: const Icon(Icons.settings),
tooltip: 'Settings',
onPressed: () {
Navigator.pushNamed(context, '/settings');
},
),
IconButton(
icon: const Icon(Icons.logout),
tooltip: 'Logout',
onPressed: () => showDialog<String>(
context: context,
builder: (BuildContext context) => AlertDialog(
title: const Center(child: Text('Logout')),
content: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: const [
Text('Are you sure you want to logout?'),
],
),
actions: <Widget>[
TextButton(
onPressed: () => Navigator.pop(context, 'Cancel'),
child: const Text('Cancel'),
),
TextButton(
onPressed: () {
//context.read<AuthenticationProvider>().signOut(context);
Navigator.pop(context, 'SignOut');
},
child: const Text('Yes'),
),
],
),
),
),
],)
,
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
【问题讨论】：
标签： flutter android-studio visual-studio-code