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[英]How to maintain Flutter Global BloC state using Provider on Hot Reload?
[英]How to keep BLoC state on Flutter Hot Reload?
我喜欢 Flutter 热重载,但发现我的 BLoC 中的 state 没有保留。 每次我进行热重载时它都会重置。
有没有办法保存 state 以便它在热重载后仍然存在? (我可以接听电话之类的吗?)
谢谢你的时间!
@RémiRousselet出现了! 我将状态保持在有状态小部件之外! 为了清楚起见,这是之前和之后的代码。 (MaterialApp home:参数和_MyHomePageState.build是真正的更改所在的位置)
错误代码:
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
home: BlocProvider<PandemicBloc>(
bloc: PandemicBloc(), child: MyHomePage(title: 'Pandemic Tracker')),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final PandemicBloc pandemicBloc = BlocProvider.of<PandemicBloc>(context);
int _currentTab = 0;
Widget build(BuildContext context) {
return DefaultTabController(...
好代码:
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
home: MyHomePage(title: 'Pandemic Tracker'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _currentTab = 0;
final _pandemicBloc = PandemicBloc();
Widget build(BuildContext context) {
return BlocProvider<PandemicBloc>(
bloc: _pandemicBloc,
child: DefaultTabController(...
您可以检查您是否在 MaterialApp 中使用全局 navigatorKey 吗?
我删除了我的,问题就解决了。
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