VintLin
commented
4 years ago 您说的问题其实和Fish Redux没有太多关系， 这个和Widget的生命周期有有关，在创建一个Widget的过程中initState以及第一次调用的didChangeDependencies时，Widget的context并没有初始化完成，因此在您展示弹窗时才会出现相应的问题。 解决方法: 您可以通过引入:
import 'package:flutter/scheduler.dart';
在iniState中获取页面第一帧创建时的回调, 在其中做弹窗操作即可:
void _initState(Action action, Context<PageState> ctx) {
SchedulerBinding.instance.addPostFrameCallback((_) {
// Do Something
});
}
andyxiaoxi
initstate的错误 void _init(Action action, Context ctx) {
//展示对话框
DialogUtil.showNetLoadingDialog(ctx.context);
//网络请求
_getHouseData(ctx.context, ctx.extra['page'], filterData).then((houseData) {
ctx.dispatch(HouseActionCreator.onLoadHouseData(houseData));
});
I/flutter (12789): The following assertion was thrown building _PageWidget<HouseState, Map<String, dynamic>>(state:
I/flutter (12789): _PageState<HouseState, Map<String, dynamic>>#d306a):
I/flutter (12789): inheritFromWidgetOfExactType(_LocalizationsScope) or inheritFromElement() was called before
I/flutter (12789): ComponentState.initState() completed.
I/flutter (12789): When an inherited widget changes, for example if the value of Theme.of() changes, its dependent
I/flutter (12789): widgets are rebuilt. If the dependent widget's reference to the inherited widget is in a constructor
I/flutter (12789): or an initState() method, then the rebuilt dependent widget will not reflect the changes in the
I/flutter (12789): inherited widget.
I/flutter (12789): Typically references to inherited widgets should occur in widget build() methods. Alternatively,
I/flutter (12789): initialization based on inherited widgets can be placed in the didChangeDependencies method, which
I/flutter (12789): is called after initState and whenever the dependencies change thereafter.
I/flutter (12789):
I/flutter (12789): User-created ancestor of the error-causing widget was:
I/flutter (12789): MaterialApp file:///C:/ccb-flutter/CCBAgency/lib/main.dart:59:12
I/flutter (12789):
I/flutter (12789): When the exception was thrown, this was the stack:
I/flutter (12789): #0 StatefulElement.inheritFromElement. (package:flutter/src/widgets/framework.dart:4164:9)
I/flutter (12789): #1 StatefulElement.inheritFromElement (package:flutter/src/widgets/framework.dart:4207:6)
I/flutter (12789): #2 Element.inheritFromWidgetOfExactType (package:flutter/src/widgets/framework.dart:3439:14)
I/flutter (12789): #3 Localizations.of (package:flutter/src/widgets/localizations.dart:448:47)
2, didChangeDependencies 里的错误 void _depend(Action action, Context ctx){
//展示对话框
DialogUtil.showNetLoadingDialog(ctx.context);
ErpHouseFilterData filterData = ctx.state.filterData.filterData;
//请求房源
_getHouseData(ctx.context, ctx.extra['page'], filterData).then((houseData) {
ctx.dispatch(HouseActionCreator.onLoadHouseData(houseData));
});
}
The following assertion was thrown building _PageWidget<HouseState, Map<String, dynamic>>(state: I/flutter (12789): _PageState<HouseState, Map<String, dynamic>>#3d574): I/flutter (12789): setState() or markNeedsBuild() called during build. I/flutter (12789): This Overlay widget cannot be marked as needing to build because the framework is already in the I/flutter (12789): process of building widgets. A widget can be marked as needing to be built during the build phase I/flutter (12789): only if one of its ancestors is currently building. This exception is allowed because the framework I/flutter (12789): builds parent widgets before children, which means a dirty descendant will always be built. I/flutter (12789): Otherwise, the framework might not visit this widget during this build phase. I/flutter (12789): The widget on which setState() or markNeedsBuild() was called was: I/flutter (12789): Overlay-[LabeledGlobalKey#7829d]
I/flutter (12789): The widget which was currently being built when the offending call was made was:
I/flutter (12789): _PageWidget<HouseState, Map<String, dynamic>>
I/flutter (12789):
I/flutter (12789): User-created ancestor of the error-causing widget was:
I/flutter (12789): MaterialApp file:///C:/ccb-flutter/CCBAgency/lib/main.dart:59:12
I/flutter (12789):
I/flutter (12789): When the exception was thrown, this was the stack:
I/flutter (12789): #0 Element.markNeedsBuild. (package:flutter/src/widgets/framework.dart:3687:11)
I/flutter (12789): #1 Element.markNeedsBuild (package:flutter/src/widgets/framework.dart:3702:6)
I/flutter (12789): #2 State.setState (package:flutter/src/widgets/framework.dart:1161:14)
I/flutter (12789): #3 OverlayState.insertAll (package:flutter/src/widgets/overlay.dart:346:5)
I/flutter (12789): #4 OverlayRoute.install (package:flutter/src/widgets/routes.dart:43:24)
I/flutter (12789): #5 TransitionRoute.install (package:flutter/src/widgets/routes.dart:180:11)
I/flutter (12789): #6 ModalRoute.install (package:flutter/src/widgets/routes.dart:907:11)
I/flutter (12789): #7 NavigatorState.push (package:flutter/src/widgets/navigator.dart:1768:11)
I/flutter (12789): #8 showGeneralDialog (package:flutter/src/widgets/routes.dart:1566:53)
I/flutter (12789): #9 showDialog (package:flutter/src/material/dialog.dart:705:10)
I/flutter (12789): #10 DialogUtil.showNetLoadingDialog (package:ccbagency/util/DialogUtil.dart:23:7)
I/flutter (12789): #11 _depend (package:ccbagency/page/house_page/effect.dart:67:14)
I/flutter (12789): #12 combineEffects. (package:fish_redux/src/redux_component/helper.dart:74:32)
I/flutter (12789): #13 createEffectDispatch. (package:fish_redux/src/redux_component/helper.dart:89:39)
I/flutter (12789): #14 createDispatch. (package:fish_redux/src/redux_component/helper.dart:109:39)
I/flutter (12789): #15 LogicContext.onLifecycle (package:fish_redux/src/redux_component/context.dart:9