当我尝试在本地iOS模拟器上启动应用程序时,我刚刚在稳定频道上升级了Flutter,并获得了以下StackTrace。使用flutter test
运行单元测试也会受到影响。
Launching lib/main.dart on iPhone 8 in debug mode...
Compiler message:
../../flutter/.pub-cache/hosted/pub.dartlang.org/native_device_orientation-0.1.2/lib/native_device_orientation.dart:149:30: Error: Getter not found: 'suspending'.
case AppLifecycleState.suspending:
^^^^^^^^^^
Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
Failed to build bundle.
Error launching application on iPhone 8.
Flutter Doctor -v
[✓] Flutter (Channel stable, v1.12.13+hotfix.5, on Mac OS X 10.14.6 18G1012, locale de-DE)
• Flutter version 1.12.13+hotfix.5
• Framework revision 27321ebbad (33 hours ago), 2019-12-10 18:15:01 -0800
• Engine revision 2994f7e1e6
• Dart version 2.7.0
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.0-rc2)
• Android SDK at ...Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-29, build-tools 29.0.0-rc2
• Java binary at: .../bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 11.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 11.3, Build version 11C29
• CocoaPods version 1.6.0
[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 42.1.1
• Dart plugin version 191.8593
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
[✓] Connected device (1 available)
• iPhone 8 • ios • com.apple.CoreSimulator.SimRuntime.iOS-13-3 (simulator)
• No issues found!
有人解决吗?
答案 0 :(得分:3)
我有同样的问题。
请查看native_device_orientation软件包的变更日志:
“做出重大更改以支持AppLifecycleState.suspended已更改为AppLifecycleState.detached的事实。”
您的一个软件包可能取决于此库。在这里,您可以找到软件包https://pub.dev/packages?q=dependency%3Anative_device_orientation的列表。
对我来说是qr_mobile_vision。
答案 1 :(得分:2)
要使答案的范围比@ x23b5提交的答案的范围略宽,这确实是由PR在11月4日进入flutter主频道引起的。
PR将枚举:AppLifecycleState.suspending
更新为AppLifecycleState.detached
。
您可能在其中一个依赖于该枚举的插件中使用依赖项,例如one of these-在这种情况下,您的调试错误消息将指向该插件-然后只需访问其github存储库,看看是否作者发布了补丁。如果没有,请随时编辑该行并为其提交PR。
另一方面,如果您手动编写了利用AppLifecycleState的代码(例如我的案例),请在代码中进行搜索,然后手动将挂起状态更新为分离状态并重新启动。