【发布时间】：2022-06-14 16:27:26
【问题描述】：
在构建 HomeScreen（脏，依赖项：[MediaQuery，_LocalizationsScope-[GlobalKey#38eb2]]，状态：_HomeScreenState#08370）时引发了以下 _CastError： 用于空值的空检查运算符
相关的导致错误的小部件是： HomeScreen HomeScreen:file:///D:/swayam/swayam-app/lib/ui/home/HomeWizardScreen.dart:180:21 抛出异常时，这是堆栈： #0 _HomeScreenState.percentIndicatorForIntensity（包：run_tracker/ui/home/HomeScreen.dart:1183:40） #1 _HomeScreenState.build（包：run_tracker/ui/home/HomeScreen.dart:706:37） #2 StatefulElement.build (package:flutter/src/widgets/framework.dart:4870:27) #3 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4754:15) #4 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4928:11) #5 Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5) #6 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2659:19) #7 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:882:21) #8 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1144:15) #9 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1081:9) （从 dart:async 中省略了 3 帧）
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标签： flutter