Redux 控件树被锁定时调用的颤振setState（）或markNeedsBuild（）
我很难找到这个异常的源代码，而且这个应用程序非常复杂，所以很难显示代码的任何相关部分。这是发生错误时的我的存储库： 我怀疑以下代码可能是肇事者：Redux 控件树被锁定时调用的颤振setState（）或markNeedsBuild（）,redux,dart,flutter,Redux,Dart,Flutter,我很难找到这个异常的源代码，而且这个应用程序非常复杂，所以很难显示代码的任何相关部分。这是发生错误时的我的存储库： 我怀疑以下代码可能是肇事者： Widget buildResultCard(Map result, BuildContext context) { String name = result["value"]; String description = result["label"].replaceAll(new RegExp(r"<(?:.|
Widget buildResultCard(Map result, BuildContext context) {
String name = result["value"];
String description =
result["label"].replaceAll(new RegExp(r"<(?:.|\n)*?>"), "");
TextEditingController controller = new TextEditingController(text: name);
Function onPressed = () {
showDialog(
context: context,
child: new AlertDialog(
title: new Text("Name your schedule"),
content: new TextField(
autofocus: true,
controller: controller,
),
actions: <Widget>[
new FlatButton(
onPressed: () {
String givenName = controller.text;
ScheduleMeta schedule = new ScheduleMeta(
givenName: givenName,
name: name,
type: _selectedChoice.value,
description: description);
scheduleStore
.dispatch(new AddScheduleAction(schedule: schedule));
scheduleStore.dispatch(
new SetCurrentScheduleAction(schedule: schedule));
fetchAllSchedules(scheduleStore.state.schedules)
.then((weeks) {
scheduleStore.dispatch(
new SetWeeksForCurrentScheduleAction(weeks: weeks));
});
Scaffold.of(context).showSnackBar(new SnackBar(
content: new Text("Added " + givenName),
action: new SnackBarAction(
label: "Undo",
onPressed: () {
scheduleStore.dispatch(
new RemoveScheduleAction(schedule: name));
Scaffold.of(context).showSnackBar(new SnackBar(
content: new Text(
"Deleted " + givenName),
));
}),
));
Navigator.of(context).pop();
},
child: new Text("Add")),
],
));
};
return new Card(
child: new Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new ListTile(
leading: const Icon(Icons.schedule),
title: new Text(name),
subtitle: new Text(description),
isThreeLine: true,
dense: true,
),
new ButtonTheme.bar(
child: new ButtonBar(
children: <Widget>[
new FlatButton(
child: const Text('Add Schedule'),
onPressed: scheduleStore.state.schedules
.any((schedule) => schedule.name == name)
? null
: onPressed)
],
),
),
],
),
);
}
Widget buildResultCard（映射结果、构建上下文）{
字符串名称=结果[“值”]；
字符串描述=
结果[“label”].replaceAll（新的RegExp（r“），”）；
TextEditingController=新的TextEditingController（文本：名称）；
函数onPressed=（）{
显示对话框(
上下文：上下文，
子：新建警报对话框(
标题：新文本（“列出您的时间表”），
内容：新文本字段(
自动对焦：对，
控制器：控制器，
),
行动：[
新扁平按钮(
已按下：（）{
字符串givenName=controller.text；
ScheduleMeta schedule=新ScheduleMeta(
吉文纳姆：吉文纳姆，
姓名:姓名,，
类型：_selectedChoice.value，
说明：说明）；
调度存储
.调度（新的AddScheduleAction（调度：调度））；
调度存储(
新的SetCurrentScheduleAction（schedule:schedule））；
fetchAllSchedules（scheduleStore.state.schedules）
.然后（（周）{
调度存储(
新SetWeekForCurrentScheduleAction（周：周））；
});
Scaffold.of（上下文）.showSnackBar（新的SnackBar(
内容：新文本（“添加”+givenName），
行动：新SnackBarAction(
标签：“撤消”，
已按下：（）{
调度存储(
新RemoveScheduleAction（计划：名称））；
Scaffold.of（上下文）.showSnackBar（新的SnackBar(
内容：新文本(
“删除”+givenName），
));
}),
));
Navigator.of（context.pop（）；
},
子项：新文本（“添加”），
],
));
};
归还新卡(
子：新列(
mainAxisSize:mainAxisSize.min，
儿童：[
新ListTile(
前导：常量图标（图标.时间表），
标题：新文本（名称），
副标题：新文本（说明），
伊斯特里琳：是的，
是的，
),
新钮扣。新钮扣(
孩子：新纽扣吧(
儿童：[
新扁平按钮(
子项：常量文本（“添加明细表”），
onPressed:scheduleStore.state.schedules
.any（（schedule）=>schedule.name==name）
无效的
：ON按下）
],
),
),
],
),
);
}
I/flutter (13466): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
I/flutter (13466): The following assertion was thrown while finalizing the widget tree:
I/flutter (13466): setState() or markNeedsBuild() called when widget tree was locked.
I/flutter (13466): This _ModalScope widget cannot be marked as needing to build because the framework is locked.
I/flutter (13466): The widget on which setState() or markNeedsBuild() was called was:
I/flutter (13466): _ModalScope([LabeledGlobalKey<_ModalScopeState>#cb4cc]; state: _ModalScopeState#d4c02())
I/flutter (13466):
I/flutter (13466): When the exception was thrown, this was the stack:
I/flutter (13466): #0 Element.markNeedsBuild.<anonymous closure> (package:flutter/src/widgets/framework.dart:3250)
I/flutter (13466): #2 Element.markNeedsBuild (package:flutter/src/widgets/framework.dart:3226)
I/flutter (13466): #3 State.setState (package:flutter/src/widgets/framework.dart:1072)
I/flutter (13466): #4 _ModalScopeState._routeSetState (package:flutter/src/widgets/routes.dart:473)
I/flutter (13466): #5 ModalRoute.setState (package:flutter/src/widgets/routes.dart:552)
I/flutter (13466): #6 ModalRoute.changedInternalState (package:flutter/src/widgets/routes.dart:889)
I/flutter (13466): #7 TransitionRoute&&LocalHistoryRoute.removeLocalHistoryEntry (package:flutter/src/widgets/routes.dart:317)
I/flutter (13466): #8 LocalHistoryEntry.remove (package:flutter/src/widgets/routes.dart:267)
I/flutter (13466): #9 DrawerControllerState.dispose (package:flutter/src/material/drawer.dart:147)
I/flutter (13466): #10 StatefulElement.unmount (package:flutter/src/widgets/framework.dart:3550)
I/flutter (13466): #11 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1626)
I/flutter (13466): #12 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #13 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #14 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #15 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #16 MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4421)
I/flutter (13466): #17 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #18 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #19 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #20 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #21 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #22 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #23 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #24 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #25 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4321)
I/flutter (13466): #26 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #27 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #28 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #29 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #30 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #31 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4321)
I/flutter (13466): #32 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #33 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #34 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #35 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #36 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #37 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #38 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #39 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #40 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #41 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #42 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #43 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #44 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #45 _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1624)
I/flutter (13466): #46 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3427)
I/flutter (13466): #47 _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1622)
I/flutter (13466): #48 _InactiveElements._unmountAll (package:flutter/src/widgets/framework.dart:1636)
I/flutter (13466): #49 BuildOwner.finalizeTree.<anonymous closure> (package:flutter/src/widgets/framework.dart:2228)
I/flutter (13466): #50 BuildOwner.lockState (package:flutter/src/widgets/framework.dart:2060)
I/flutter (13466): #51 BuildOwner.finalizeTree (package:flutter/src/widgets/framework.dart:2227)
I/flutter (13466): #52 BindingBase&SchedulerBinding&GestureBinding&ServicesBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:505)
I/flutter (13466): #53 BindingBase&SchedulerBinding&GestureBinding&ServicesBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:189)
I/flutter (13466): #54 BindingBase&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:688)
I/flutter (13466): #55 BindingBase&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:636)
I/flutter (13466): #56 _drawFrame (file:///b/build/slave/Linux_Engine/build/src/flutter/lib/ui/hooks.dart:70)
I/flutter (13466): (elided one frame from class _AssertionError)
I/flutter (13466): ════════════════════════════════════════════════════════════════════════════════════════════════════
I/颤振（13466）：══╡ WIDGETS库捕获到异常╞═══════════════════════════════════════════════════════════
I/flatter（13466）：在完成小部件树时抛出以下断言：
I/flatter（13466）：当小部件树被锁定时调用setState（）或markNeedsBuild（）。
I/flatter（13466）：由于框架已锁定，因此无法将此_ModalScope小部件标记为需要构建。
I/flatter（13466）：调用setState（）或markNeedsBuild（）的小部件是：
I/颤振（13466）：_模态镜（[LabeledGlobalKey#cb4cc]；状态：_模态镜状态#d4c02（））
I/颤振（13466）：
I/flatter（13466）：当抛出异常时，这是堆栈：
I/颤振（13466）：#0元素。标记需要构建。（包：flatter/src/widgets/framework.dart:3250）
I/flatter（13466）：#2 Element.markNeedsBuild（包：flatter/src/widgets/framework.dart:3226）
I/flatter（13466）：#3 State.setState（包：flatter/src/widgets/framework.dart:1072）
I/flatter（13466）：#4 ModalScopeState.routeSetState（包：flatter/src/widgets/routes.dart:473）
I/flatter（13466）：#5 ModalRoute.setState（包：flatter/src/widgets/routes.dart:552）
I/flatter（13466）：#6 ModalRoute.changedInternalState（包：flatter/src/widgets/routes.dart:889）
I/flatter（13466）：#7 TransitionRoute&&LocalHistoryRoute.removeLocalHistoryEntry（包：flatter/src/widgets/routes.dart:317）
I/flatter（13466）：#8 LocalHistoryEntry.remove（包：flatter/src/widgets/routes.dart:267）
I/颤振（13466）：#9抽屉控制器状态。处置（包装：颤振/src/材料/抽屉。省道：147）
I/flatter（13466）：#10 StatefulElement.unmount（包：flatter/src/widgets/framework.dart:3550）
I/flatter（13466）：#11个非活动元素。"卸载（包：flatter/src/widgets/framework.dart:1626）
I/颤振（13466）：#12个不活动元件。#卸载。（包装：颤振/src/wid
Widget build(BuildContext context) {
myParentWidgetState.setState(() { print("foo"); });
return Container();
}
Widget build(BuildContext context) {
Navigator.pop(context);
return Container();
}
import 'dart:async';
@override
void initState() {
super.initState();
Timer.run(() {
// You can call setState from here
});
}
WidgetsBinding.instance
.addPostFrameCallback((_) {
//valueNotifier.value = _pcm; //provider
//setState
});
void initState() {
super.initState();
if (auth.getUser != null) {
// ERROR
// Navigator.pushReplacementNamed(context, '/home');
// SUCCESS
// WidgetsBinding.instance.addPostFrameCallback((_) => setState(() {
// Navigator.pushReplacementNamed(context, '/home');
// }));
// SUCCESS
Timer.run(() {
Navigator.pushReplacementNamed(context, '/home');
});
}
}