我使用的库**Provider**如下:
runApp(
LocalizedApp(
delegate,
MyApp(
localizedValues: {},
),
),
);
然后:
class MyApp extends StatelessWidget {
final Map<String, Map<String, String>> localizedValues;
MyApp({required this.localizedValues});
@override
Widget build(BuildContext context) {
final localizationDelegate = LocalizedApp.of(context).delegate;
return MultiProvider(
providers: [
ChangeNotifierProvider(create: (_) => MyRents()),
],
child: MaterialApp(
initialRoute: initialRoute,
localizationsDelegates: [
GlobalMaterialLocalizations.delegate,
GlobalCupertinoLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
localizationDelegate
],
这是我的提供者:
class MyRents extends ChangeNotifier {
// LIST OF VARS NOT USED AT THIS POINT
bool loadingUserInfo = false;
var language;
// List list = rentsList;
List list = [];
int currentPortfolioIndex = 0;
int currenRentIndex = 0;
var clonedRent;
List newGalleryImages = []; // local gallery images that we haven't pushed yet
SharedPreferences? prefs;
String viewMode = 'multi';
bool galleryScrollView = true;
PageController portfolioController = PageController(initialPage: 0);
MyUser? user; // TODO: move this to a separate provider
List<ProductDetails> products = [];
List<PurchaseDetails> purchases = [];
bool showAds = false;
Map companyInfo = {};
List withholdings = [];
List<QueryDocumentSnapshot> taxes = [];
// END LIST
// MyRents(); // TODO: check null (this was working in Flutter 1 but not now so it might be related to the error)...
final MyRents myRents = MyRents(); // ...and this is the Flutter 2 version
updateUI() {
notifyListeners();
}
}
final MyRents myRents = MyRents();
这在Flutter1中运行良好,但现在在Flutter2中出现此错误:
重新组装main. dart $main-2339422228391703失败:ext.flutter.reassemble:(-32000)服务器错误{"异常":"错误状态:试图读取在创建其值期间引发的提供程序。\n在创建类型MyRents期间发生异常。"," stack ":" #0_CreateInheritedProviderState. value(package:provider/src/inherited_provider. dart:661:7)\n#1
_继承提供程序作用域元素。重新汇编(包:提供程序/源/继承的提供程序。dart:367:60)\n#2
元素.重新组装.(包:flutter/src/widget/framework. dart:3072:13)\n#3
组件元素. visitChildren(软件包:flutter/src/widget/framework. dart:4549:14)\n#4
元素.重新组装(包:flutter/src/widget/framework. dart:3071:5)\n#5
元素.重新组装.(包:flutter/src/widget/framework. dart:3072:13)\n#6
组件元素. visitChildren(软件包:flutter/src/widget/framework. dart:4549:14)\n#7
元素.重新组装(包:flutter/src/widget/framework. dart:3071:5)\n#8
元素.重新组装.(包:flutter/src/widget/framework. dart:3072:13)\n#9
组件元素. visitChildren(软件包:flutter/src/widget/framework. dart:4549:14)\n#10
元素.重新组装(包:flutter/src/widget/framework. dart:3071:5)\n#11
元素.重新组装.(包:flutter/src/widget/framework. dart:3072:13)\n#12
组件元素. visitChildren(软件包:flutter/src/widget/framework. dart:4549:14)\n#13
元素.重新组装(包:flutter/src/widget/framework. dart:3071:5)\n#14
元素.重新组装.(包:flutter/src/widget/framework. dart:3072:13)\n#15
组件元素. visitChildren(软件包:flutter/src/widget/framework. dart:4549:14)\n#16
元素.重新组装(包:flutter/src/widget/framework. dart:3071:5)\n#17
元素.重新组装.(包:flutter/src/widget/framework. dart:3072:13)\n#18
组件元素. visitChildren(软件包:flutter/src/widget/framework. dart:4549:14)\n#19
元素。重新组装(包:flutter/src/widget/framework. dart:3071:5)\n#20
状态元素。重新汇编(软件包:flutter/src/widget/framework. dart:4624:11)\n#21
元素.重新组合.(软件包:flutter/src/widget/framework. dart:3072:13)\n#22
呈现对象到部件元素. visitChildren(包:flutter/src/部件/绑定. dart:1139:14)\n#23
元素.重新组装(软件包:flutter/src/widget/framework. dart:3071:5)\n#24
构建所有者。重新汇编(包:flutter/src/widget/framework. dart:2892:12)\n#25
小部件绑定.执行重新组装(软件包:flutter/src/widget/binding. dart:951:19)\n#26
绑定基础. lockEvents(数据包:flutter/src/foundation/绑定. dart:298:41)\n#27
绑定基础.重新组合应用程序(包:flutter/src/foundation/绑定. dart:338:12)\n#28
绑定基础.注册信号服务扩展.(软件包:flutter/src/foundation/binding. dart:375:23)\n#29
绑定基础.注册信号服务扩展.(软件包:flutter/src/foundation/binding. dart:374:17)\n#30
绑定基础.注册服务扩展.(软件包:flutter/src/foundation/binding. dart:597:32)\n\n ","方法:"扩展flutter.重新汇编"}
还有另一个
========= Flutter框架捕获到异常==========================================================================================================================================================================================================================================状态错误:尝试读取提供程序,但在创建其值期间引发了该提供程序.在创建类型MyRents期间发生异常.
1条答案
按热度按时间jjjwad0x1#
将此注解掉
final MyRents myRents = MyRents();
,并使用这个ChangeNotifierProvider<MyRents>(create: (_) => MyRents())