跑不起了

[awu515]

最近在学习flutter,项目下载下来，跑不起了，启动页过后卡住了。

======== Exception caught by widgets library ======================================================= The following assertion was thrown building Builder(dirty, dependencies: [MediaQuery]): No MediaQuery widget ancestor found.

ScreenUtilInit widgets require a MediaQuery widget ancestor. The specific widget that could not find a MediaQuery ancestor was: ScreenUtilInit state: _ScreenUtilInitState#91dc1 The ownership chain for the affected widget is: "ScreenUtilInit ← Application ← [root]"

No MediaQuery ancestor could be found starting from the context that was passed to MediaQuery.of(). This can happen because you have not added a WidgetsApp, CupertinoApp, or MaterialApp widget (those widgets introduce a MediaQuery), or it can happen if the context you use comes from a widget above those widgets.

The relevant error-causing widget was: Builder Builder:file:///E:/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_screenutil-5.5.3+2/lib/src/screenutil_init.dart:128:16 When the exception was thrown, this was the stack: #0 debugCheckHasMediaQuery. (package:flutter/src/widgets/debug.dart:246:7) #1 debugCheckHasMediaQuery (package:flutter/src/widgets/debug.dart:261:4) #2 MediaQuery.of (package:flutter/src/widgets/media_query.dart:908:12) #3 Application.build. (package:my_bili/application.dart:49:30) #4 _ScreenUtilInitState.child (package:flutter_screenutil/src/screenutil_init.dart:83:27) #5 _ScreenUtilInitState.build. (package:flutter_screenutil/src/screenutil_init.dart:136:20) #6 Builder.build (package:flutter/src/widgets/basic.dart:7371:48) #7 StatelessElement.build (package:flutter/src/widgets/framework.dart:4876:49) #8 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4806:15) #9 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5) #10 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4787:5) #11 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4781:5) ... Normal element mounting (21 frames) #32 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3817:16) #33 Element.updateChild (package:flutter/src/widgets/framework.dart:3551:18) #34 RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:1202:16) #35 RenderObjectToWidgetElement.mount (package:flutter/src/widgets/binding.dart:1171:5) #36 RenderObjectToWidgetAdapter.attachToRenderTree. (package:flutter/src/widgets/binding.dart:1119:18) #37 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2597:19) #38 RenderObjectToWidgetAdapter.attachToRenderTree (package:flutter/src/widgets/binding.dart:1118:13) #39 WidgetsBinding.attachRootWidget (package:flutter/src/widgets/binding.dart:953:7) #40 WidgetsBinding.scheduleAttachRootWidget. (package:flutter/src/widgets/binding.dart:933:7) (elided 11 frames from class _RawReceivePortImpl, class _Timer, dart:async, and dart:async-patch)

[xiaoxiaohaozai]

在Application中移除MediaQuery这个试试

[awu515]

感觉不是MediaQuery 问题，应该是屏幕适配ScreenUtilInit的设置问题

[xiaoxiaohaozai]

我也是看ScreenUtilInit的issues有提到相关问题, MediaQuery 的位置不太正确,不过我这几个都没复现这个问题

[awu515]

ScreenUtilInit 里面的builder，参数好像是2个，项目中的是一个参数context

[xiaoxiaohaozai]

你可以参考ScreenUtilInit官网配置下,影响不大