Hero._allHeroesFor.inviteHero.

解决办法:

给FloatingActionButton 加heroTag标签

错误信息有关

I/flutter (14406): When the exception was thrown, this was the stack:

I/flutter (14406): #0      Hero._allHeroesFor.inviteHero.<anonymous closure> (package:flutter/src/widgets/heroes.dart:268:11)

I/flutter (14406): #1      Hero._allHeroesFor.inviteHero (package:flutter/src/widgets/heroes.dart:279:8)

I/flutter (14406): #2      Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:298:21)

I/flutter (14406): #3      SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5861:14)

I/flutter (14406): #4      Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #5      ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #6      Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #7      MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5973:16)

I/flutter (14406): #8      Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #9      SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5861:14)

I/flutter (14406): #10    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #11    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #12    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #13    SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5861:14)

I/flutter (14406): #14    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #15    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #16    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #17    MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5973:16)

I/flutter (14406): #18    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #19    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #20    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #21    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #22    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #23    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #24    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #25    MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5973:16)

I/flutter (14406): #26    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #27    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #28    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #29    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #30    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #31    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #32    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #33    SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5861:14)

I/flutter (14406): #34    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #35    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #36    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #37    SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5861:14)

I/flutter (14406): #38    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #39    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #40    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #41    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #42    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #43    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #44    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #45    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #46    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #47    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #48    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #49    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #50    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #51    SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5861:14)

I/flutter (14406): #52    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #53    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4600:14)

I/flutter (14406): #54    Hero._allHeroesFor.visitor (package:flutter/src/widgets/heroes.dart:311:15)

I/flutter (14406): #55    SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5861:14)

I/flutter (14406): #56    Element.visitChildElements (package:flutter/src/widgets/framework.dart:3174:5)

I/flutter (14406): #57    Hero._allHeroesFor (package:flutter/src/widgets/heroes.dart:314:13)

I/flutter (14406): #58    HeroController._startHeroTransition (package:flutter/src/widgets/heroes.dart:841:51)

I/flutter (14406): #59    HeroController._maybeStartHeroTransition.<anonymous closure> (package:flutter/src/widgets/heroes.dart:815:11)

I/flutter (14406): #60    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1117:15)

I/flutter (14406): #61    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1064:9)

I/flutter (14406): #62    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:972:5)

I/flutter (14406): #66    _invoke (dart:ui/hooks.dart:253:10)

I/flutter (14406): #67    _drawFrame (dart:ui/hooks.dart:211:3)

I/flutter (14406): (elided 3 frames from dart:async)