汇总个flutter常见问题
1、
'package:bloc/src/transition.dart': Failed assertion: line 23 pos 16: 'currentState != null': is not true.
I/System.out( 1080): #0 _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:42:39)
I/System.out( 1080): #1 _AssertionError._throwNew (dart:core-patch/errors_patch.dart:38:5)
I/System.out( 1080): #2 new Transition (package:bloc/src/transition.dart:23:16)
I/System.out( 1080): #3 Bloc._bindStateSubject.<anonymous closure> (package:bloc/src/bloc.dart:159:28)
I/System.out( 1080): #4 Stream.forEach.<anonymous closure>.<anonymous closure> (dart:async/stream.dart:897:45)
I/System.out( 1080): #5 _runUserCode (dart:async/stream_pipe.dart:13:23)
I/System.out( 1080): #6 Stream.forEach.<anonymous closure> (dart:async/stream.dart:897:11)
I/System.out( 1080): #7 _rootRunUnary (dart:async/zone.dart:1134:38)
I/System.out( 1080): #8 _CustomZone.runUnary (dart:async/zone.dart:1031:19)
I/System.out( 1080): #9 _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
I/System.out( 1080): #10 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:338:11)
I/System.out( 1080): #11 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:265:7)
I/System.out( 1080): #12 _SyncBroadcastStreamController._sendData (dart:async/broadcast_stream_controller.dart:377:20)
I/System.out( 1080): #13 _BroadcastStreamController._add (dart:async/broadcast_stream_controller.dart:289:5)
I/System.out( 1080): #14 _rootRunUnary (dart:async/zone.dart:1134:38)
I/System.out( 1080): #15 _CustomZone.runUnary (dart:async/zone.dart:1031:19)
I/System.out( 1080): #16 _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
I/System.out( 1080): #17 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:338:11)
I/System.out( 1080): #18 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:265:7)
I/System.out( 1080): #19 _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:134:11)
I/System.out( 1080): #20 _ForwardingStream._handleData (dart:async/stream_pipe.dart:100:10)
I/System.out( 1080): #21 _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:166:13)
I/System.out( 1080): #22 _rootRunUnary (dart:async/zone.dart:1134:38)
I/System.out( 1080): #23 _CustomZone.runUnary (dart:async/zone.dart:1031:19)
I/System.out( 1080): #24 _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
I/System.out( 1080): #25 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:338:11)
I/System.out( 1080): #26 _DelayedData.perform (dart:async/stream_impl.dart:593:14)
I/System.out( 1080): #27 _StreamImplEvents.handleNext (dart:async/stream_impl.dart:709:11)
I/System.out( 1080): #28 _PendingEvents.schedule.<anonymous closure> (dart:async/stream_impl.dart:669:7)
I/System.out( 1080): #29 _rootRun (dart:async/zone.dart:1122:38)
I/System.out( 1080): #30 _CustomZone.run (dart:async/zone.dart:1023:19)
I/System.out( 1080): #31 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
I/System.out( 1080): #32 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
I/System.out( 1080): #33 _rootRun (dart:async/zone.dart:1126:13)
I/System.out( 1080): #34 _CustomZone.run (dart:async/zone.dart:1023:19)
I/System.out( 1080): #35 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
I/System.out( 1080): #36 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
I/System.out( 1080): #37 _microtaskLoop (dart:async/schedule_microtask.dart:43:21)
I/System.out( 1080): #38 _startMicrotaskLoop (dart:async/schedule_microtask.dart:52:5)
是state没有初始化的问题
@override
get initialState => null;
加个初始化的state就好了
@override
get initialState => TestInitState();
