颤振:错误:找不到吸气剂:'挂起'。案例AppLifecycleState.suspending

时间:2019-12-12 11:15:35

标签: ios iphone flutter dependencies flutter-dependencies

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?

2 个答案:

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。