是否有flutter Zxing2 pub包的工作示例。我确实尝试过官方的酒吧套餐示例[https://pub.dev/packages/zxing2/example|Dart Package]，但它不起作用。我得到以下错误
I/CameraManagerGlobal( 5452): Connecting to camera service
E/flutter ( 5452): [ERROR:flutter/lib/ui/ui_dart_state.cc(213)] Unhandled Exception: CameraException(Uninitialized CameraController, startImageStream() was called on an uninitialized CameraController.)
E/flutter ( 5452): #0 CameraController._throwIfNotInitialized (package:camera/src/camera_controller.dart:769:7)
E/flutter ( 5452): #1 CameraController.startImageStream (package:camera/src/camera_controller.dart:370:5)
E/flutter ( 5452): #2 _MyHomePageState._onCameraSelected (package:test_camera/main.dart:83:26)
E/flutter ( 5452): #3 _MyHomePageState.initState (package:test_camera/main.dart:46:5)
E/flutter ( 5452): #4 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4796:57)
E/flutter ( 5452): #5 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4631:5)
E/flutter ( 5452): #6 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #7 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #8 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6186:14)
E/flutter ( 5452): #9 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #10 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #11 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4683:16)
E/flutter ( 5452): #12 Element.rebuild (package:flutter/src/widgets/framework.dart:4348:5)
E/flutter ( 5452): #13 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4636:5)
E/flutter ( 5452): #14 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4631:5)
E/flutter ( 5452): #15 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #16 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #17 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6186:14)
E/flutter ( 5452): #18 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #19 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #20 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6186:14)
E/flutter ( 5452): #21 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #22 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #23 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4683:16)
E/flutter ( 5452): #24 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4831:11)
E/flutter ( 5452): #25 Element.rebuild (package:flutter/src/widgets/framework.dart:4348:5)
E/flutter ( 5452): #26 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4636:5)
E/flutter ( 5452): #27 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4822:11)
E/flutter ( 5452): #28 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4631:5)
E/flutter ( 5452): #29 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #30 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #31 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6186:14)
E/flutter ( 5452): #32 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #33 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #34 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6186:14)
E/flutter ( 5452): #35 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #36 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #37 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4683:16)
E/flutter ( 5452): #38 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4831:11)
E/flutter ( 5452): #39 Element.rebuild (package:flutter/src/widgets/framework.dart:4348:5)
E/flutter ( 5452): #40 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4636:5)
E/flutter ( 5452): #41 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4822:11)
E/flutter ( 5452): #42 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4631:5)
E/flutter ( 5452): #43 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3666:14)
E/flutter ( 5452): #44 Element.updateChild (package:flutter/src/widgets/framework.dart:3418:18)
E/flutter ( 5452): #45 C
引发错误的代码在第83行。
有人有同样的问题吗？如果有人给我一个使用zxing2的好例子，我将不胜感激。
注意：我只需要使用zxing2，而不是qr或条形码扫描仪
感谢
我已经通过添加调用await controller.initialize();修复了这个错误unawaited(controller.startImageStream((image) {之前采用CCD_ 3方法。
但是这个例子不包含zxing2的用法…