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londonappbrewery / quizzler-flutter-challenge-final

Completed version of the Quizzler project in the Complete Flutter Bootcamp
https://www.appbrewery.co
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Show last answer result to user when dialog appears #5

Open dgigafox opened 4 years ago

dgigafox commented 4 years ago

Hi AppBrewery Team. First of all, thanks for the great tutorial. I hope you can take a look at this. This PR suggests the following changes:

simplygkgk commented 4 years ago

After inserting an Alert widget inside the setstate(), i get this message , otherwise everything works fine. Please help

E/flutter (24316): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: NoSuchMethodError: The getter 'modalBarrierDismissLabel' was called on null. E/flutter (24316): Receiver: null E/flutter (24316): Tried calling: modalBarrierDismissLabel E/flutter (24316): #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5) E/flutter (24316): #1 Alert.show (package:rflutter_alert/src/alert.dart:54:55) E/flutter (24316): #2 _QuizPageState.checkAnswer. (package:quizlerapp/main.dart:41:16) E/flutter (24316): #3 State.setState (package:flutter/src/widgets/framework.dart:1233:30) E/flutter (24316): #4 _QuizPageState.checkAnswer (package:quizlerapp/main.dart:19:7) E/flutter (24316): #5 _QuizPageState.build. (package:quizlerapp/main.dart:103:25) E/flutter (24316): #6 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:779:19) E/flutter (24316): #7 _InkResponseState.build. (package:flutter/src/material/ink_well.dart:862:36) E/flutter (24316): #8 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24) E/flutter (24316): #9 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:504:11) E/flutter (24316): #10 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:282:5) E/flutter (24316): #11 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:217:7) E/flutter (24316): #12 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:475:9) E/flutter (24316): #13 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:76:12) E/flutter (24316): #14 PointerRouter._dispatchEventToRoutes. (package:flutter/src/gestures/pointer_router.dart:122:9) E/flutter (24316): #15 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:379:8) E/flutter (24316): #16 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:120:18) E/flutter (24316): #17 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:106:7) E/flutter (24316): #18 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19) E/flutter (24316): #19 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22) E/flutter (24316): #20 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7) E/flutter (24316): #21 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7) E/flutter (24316): #22 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7) E/flutter (24316): #23 _rootRunUnary (dart:async/zone.dart:1196:13) E/flutter (24316): #24 _CustomZone.runUnary (dart:async/zone.dart:1085:19) E/flutter (24316): #25 _CustomZone.runUnaryGuarded (dart:async/zone.dart:987:7) E/flutter (24316): #26 _invoke1 (dart:ui/hooks.dart:275:10) E/flutter (24316): #27 _dispatchPointerDataPacket (dart:ui/hooks.dart:184:5) E/flutter (24316):

simplygkgk commented 4 years ago

The Problem got resolved, as i had not defined Alert message in MaterialApp , therefore it was showing an error