在使用 NavigationView 设置 Flutter Fluent UI 应用程序 fluent_UI 2.2.1 时，应用程序在网络上崩溃
<块引用>期望类型为 'SkDeletable' 的值，但得到类型为 'Null' 的值
问题似乎出在导航体上，但我还没有找到解决方案。 我正在使用 Flutter 在 Chrome 上运行我的代码（Channel beta，2.3.0-24.1.pre，在 Mac OS X 10.15.7 19H1217 darwin-x64，locale en-GB）
相同的代码与 MacOS-Desktop 应用程序完全相同。
错误：
══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
The following TypeErrorImpl was thrown during paint():
Expected a value of type 'SkDeletable', but got one of type 'Null'
The relevant error-causing widget was:
DecoratedBox
file:///Users/Passi/development/flutter/.pub-cache/hosted/pub.dartlang.org/fluent_ui-2.2.1/lib/src/styles
/acrylic.dart:149:14
When the exception was thrown, this was the stack:
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 251:49 throw_
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 84:3 castError
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/types.dart 266:34 as
lib/_engine/engine/canvaskit/skia_object_cache.dart 227:55 new
lib/_engine/engine/canvaskit/mask_filter.dart 10:3 blur
lib/_engine/engine/canvaskit/painting.dart 141:36 set maskFilter
packages/flutter/src/painting/box_shadow.dart 54:9 <fn>
packages/flutter/src/painting/box_shadow.dart 54:56 toPaint
packages/flutter/src/painting/shape_decoration.dart 337:67 <fn>
dart-sdk/lib/internal/iterable.dart 413:31 elementAt
dart-sdk/lib/internal/iterable.dart 342:26 moveNext
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 734:20 next
dart-sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart 517:14 of
packages/flutter/src/painting/shape_decoration.dart 337:67 [_precache]
packages/flutter/src/painting/shape_decoration.dart 387:5 paint
packages/flutter/src/rendering/proxy_box.dart 2162:7 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/widgets/layout_builder.dart 387:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/widgets/layout_builder.dart 387:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 139:10 _repaintCompositedChild
packages/flutter/src/rendering/object.dart 100:5 repaintCompositedChild
packages/flutter/src/rendering/object.dart 204:7 [_compositeChild]
packages/flutter/src/rendering/object.dart 185:7 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 139:10 _repaintCompositedChild
packages/flutter/src/rendering/object.dart 100:5 repaintCompositedChild
packages/flutter/src/rendering/object.dart 204:7 [_compositeChild]
packages/flutter/src/rendering/object.dart 185:7 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/proxy_box.dart 3435:11 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/widgets/overlay.dart 782:14 paintStack
packages/flutter/src/widgets/overlay.dart 800:7 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 140:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 187:12 paintChild
packages/flutter/src/rendering/view.dart 209:14 paint
packages/flutter/src/rendering/object.dart 2396:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 139:10 _repaintCompositedChild
packages/flutter/src/rendering/object.dart 100:5 repaintCompositedChild
packages/flutter/src/rendering/object.dart 975:29 flushPaint
packages/flutter/src/rendering/binding.dart 464:19 drawFrame
packages/flutter/src/widgets/binding.dart 879:13 drawFrame
packages/flutter/src/rendering/binding.dart 328:5
[_handlePersistentFrameCallback]
packages/flutter/src/scheduler/binding.dart 1143:15 [_invokeFrameCallback]
packages/flutter/src/scheduler/binding.dart 1080:9 handleDrawFrame
packages/flutter/src/scheduler/binding.dart 996:5 [_handleDrawFrame]
lib/_engine/engine/platform_dispatcher.dart 964:13 invoke
lib/_engine/engine/platform_dispatcher.dart 151:5 invokeOnDrawFrame
lib/_engine/engine.dart 395:45 <fn>
The following RenderObject was being processed when the exception was fired: RenderDecoratedBox#d274a:
needs compositing
creator: DecoratedBox ← _AcrylicInheritedWidget ← Acrylic ← LayoutBuilder ← _NavigationBody ←
NavigationView ← LayoutBuilder ← _NavigationBody ← NavigationView ← Consumer<HomeViewModel> ←
_InheritedProviderScope<HomeViewModel> ← ChangeNotifierProvider<HomeViewModel> ← ⋯
parentData: offset=Offset(0.0, 0.0) (can use size)
constraints: BoxConstraints(w=1280.0, h=721.0)
size: Size(1280.0, 721.0)
decoration: ShapeDecoration:
shadows:
BoxShadow(Color(0x21000000), Offset(0.0, 0.0), 0.0, 0.0)
BoxShadow(Color(0x1c000000), Offset(0.0, 0.0), 0.0, 0.0)
shape: RoundedRectangleBorder(BorderSide(Color(0xff000000), 0.0, BorderStyle.none),
BorderRadius.zero)
configuration: ImageConfiguration(bundle: PlatformAssetBundle#1f0bd(), devicePixelRatio: 2.0,
locale: en_US, textDirection: TextDirection.ltr, platform: macOS)
This RenderObject had the following descendants (showing up to depth 5):
child: RenderClipPath#144a5 NEEDS-PAINT
child: RenderBackdropFilter#c9de5 NEEDS-PAINT
child: RenderCustomPaint#662d0 NEEDS-PAINT
child: RenderCustomPaint#12b2c NEEDS-PAINT
child: _RenderInkFeatures#eb4d6 NEEDS-PAINT
import 'package:roptimizerai/ui/simulation_results_screen/simulation_results_screen.dart';
import 'package:stacked/stacked.dart';
import 'package:fluent_ui/fluent_ui.dart';
import 'home_view_model.dart';
class HomeScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return ViewModelBuilder<HomeViewModel>.reactive(
builder: (context, model, child) => NavigationView(
appBar: NavigationAppBar(title: Text(model.title)),
pane: NavigationPane(
displayMode: PaneDisplayMode.auto,
items: [
PaneItem(
icon: Icon(FluentIcons.edit_note),
title: Text(model.paneItem1),
),
PaneItem(
icon: Icon(FluentIcons.recent),
title: Text(model.paneItem2),
),
],
footerItems: [
PaneItemSeparator(),
PaneItem(
icon: Icon(FluentIcons.settings),
title: Text(model.footer_paneItem1)),
],
selected: model.currentIndex,
onChanged: model.setIndex,
),
content: NavigationBody(
index: model.currentIndex,
children: [
const ScaffoldPage(
header: Text(
"Create Scenario",
style: TextStyle(fontSize: 60),
),
),
SimulationResultsScreen(),
const ScaffoldPage(
header: Text(
"Settings",
style: TextStyle(fontSize: 60),
),
),
],
),
),
viewModelBuilder: () => HomeViewModel(),
);
}
}