提供者：“错误状态：试图读取在创建其值期间抛出的提供者”

Question

我正在使用这样的库提供程序：

runApp(
    LocalizedApp(
      delegate,
      MyApp(
        localizedValues: {},
      ),
    ),
  );

进而：

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 Flutter 1 中运行良好，但现在在 Flutter 2 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 {"exception":"Bad state: 尝试读取在创建其值期间抛出的提供程序。\n异常发生在创建类型 MyRents。","stack":"#0 _CreateInheritedProviderState.value (package:provider/src/inherited_provider.dart:661:7)\n#1
_InheritedProviderScopeElement.reassemble (package:provider/src/inherited_provider.dart :367:60)\n#2
Element.reassemble. (包:flutter/src/widgets/framework.dart:3072:13)\n#3
ComponentElement.visitChildren (包:flutter/src/widgets/framework.dart: 4549:14)\n#4
Element.reassemble (package:flutter/src/widgets/framework.dart:3071:5)\n#5
Element.reassemble. (package:flutter/src/widgets/framework.dart:3072 :13)\n#6
ComponentElement.visitChildren (包:flutter/src/widgets/framework.dart:4549:14)\n#7
Element.reassemble (包:flutter/src/widgets/framework.dart:3071:5 )\n#8
Element.reassemble. (包:flutter/src/widgets/framework.dart:3072:13)\n#9
ComponentElement.visitChildren (包:flutter/src/widgets/framework.dart:4549:14) \n#10
Element.reassemble (package:flutter/src/widgets/framework.dart:3071:5)\n#11
Element.reassemble。(包:flutter/src/widgets/framework.dart:3072:13)\n#12
ComponentElement.visitChildren (包:flutter/src/widgets/framework.dart:4549:14)\n#13
Element.reassemble (包:flutter/src/widgets/framework.dart:3071:5)\n#14
Element.reassemble。(包:flutter/src/widgets/framework.dart:3072:13)\n#15
ComponentElement.visitChildren (包:flutter/src/widgets/framework.dart:4549:14)\n#16
Element.reassemble (包:flutter/src/widgets/framework.dart:3071:5)\n#17
Element.reassemble。(包:flutter/src/widgets/framework.dart:3072:13)\n#18
ComponentElement.visitChildren (包:flutter/src/widgets/framework.dart:4549:14)\n#19
Element.reassemble (包:flutter/src/widgets/framework.dart:3071:5)\n#20
StatefulElement.reassemble (包:flutter/src/widgets/framework.dart:4624:11)\n#21
Element.reassemble。(包:flutter/src/widgets/framework.dart:3072:13)\n#22
RenderObjectToWidgetElement.visitChildren (包:flutter/src/widgets/binding.dart:1139:14)\n#23
Element.reassemble (包:flutter/src/widgets/framework.dart:3071:5)\n#24
BuildOwner.reassemble (包:flutter/src/widgets/framework.dart:2892:12)\n#25
WidgetsBinding.performReassemble (包:flutter /src/widgets/binding.dart:951:19)\n#26
BindingBase.lockEvents (包:flutter/src/foundation/binding.dart:298:41)\n#27
BindingBase.reassembleApplication (包:flutter/src /foundation/binding.dart:338:12)\n#28
BindingBase.registerSignalServiceExtension。（包：flutter/src/foundation/binding.dart:375:23）\n#29
BindingBase.registerSignalServiceExtension。(包:flutter/src/foundation/binding.dart:374:17)\n#30
BindingBase.registerServiceExtension。(包:flutter/src/foundation/binding.dart:597:32)\n\n","方法":"ext.flutter.reassemble"}

还有这个：

======== Flutter框架捕获的异常====================================== ================ 在“ext.flutter.reassemble”的服务扩展回调期间抛出以下 StateError：错误状态：尝试读取在创建其对象期间抛出的提供程序价值。创建类型 MyRents 期间发生异常。

Answer 1

将此注释掉

final MyRents myRents = MyRents(); 并且也使用这个

ChangeNotifierProvider<MyRents>(create: (_) => MyRents())