问题描述
1.从TestFlight下载我的应用程序后点击它，或者直接从Xcode运行，应用程序卡在启动屏幕上，无法继续。
2.连接macOS后，在Console中可以看到SpringBoard进程中可能出现的相关错误：
Attempting to create a breadcrumb action for a scene handle which already has one (sceneID:#myAppName#-default). Are you trying to active an app that's already active?
...
[Main] dispatch event:
<SBMainTransitionSwitcherModifierEvent: 0x2837d7dc0; type: MainTransition; transitionID: xxx; phase: Complete; animated: YES; fromAppLayout: 0x0; toAppLayout: <SBAppLayout: 0x281500e80; primary: #myAppName#; environment: main>; fromEnvironmentMode: home-screen; toEnvironmentMode: application; pendingTermination: {(
)}>
app可以正常启动时，不会出现此日志中的“pendingTermination: {()}”。 现在我们在我的应用进程中看不到任何日志。
3.然后当我锁屏和解锁时，iPhone 只显示黑色背景，我不能像往常一样使用我的 iPhone。这是控制台中的日志：
3.1 锁屏：
[sceneID:#myAppName#-default] Setting deactivation reasons to: 'appSwitcher,systemAnimation' for reason: updateAllScenesForBand - Assertion added.
[sceneID:#myAppName#-default] Setting deactivation reasons to: 'appSwitcher' for reason: updateAllScenesForBand - Assertion removed.
Invalidating assertion 32-60-106090 (target:[application<#myAppName#>:7754](UIScene:com.apple.frontboard.systemappservices::sceneID%3A#myAppName#-default)) from originator [daemon<com.apple.SpringBoard>:60]
Calculated state for application<#myAppName#>: none (role: UserInteractiveNonFocal)
3.2 解锁屏幕：
Acquiring assertion targeting [application<#myAppName#>:7754](UIScene:com.apple.frontboard.systemappservices::sceneID%3A#myAppName#-default) from originator [daemon<com.apple.SpringBoard>:60] with description <RBSAssertionDescriptor| "injecting inherited from "UIScene:com.apple.frontboard.systemappservices::com.apple.springboard" to 7754<UIScene:com.apple.frontboard.systemappservices::sceneID%3A#myAppName#-default>" ID:32-60-106093 target:7754<UIScene:com.apple.frontboard.systemappservices::sceneID%3A#myAppName#-default> attributes:[
<RBSHereditaryGrant| endowmentNamespace:com.apple.boardservices.endpoint-injection UIScene:com.apple.frontboard.systemappservices::com.apple.springboard>,<RBSHereditaryGrant| endowmentNamespace:com.apple.frontboard.visibility UIScene:com.apple.frontboard.systemappservices::com.apple.springboard>
]>
Assertion 32-60-106093 (target:[application<#myAppName#>:7754](UIScene:com.apple.frontboard.systemappservices::sceneID%3A#myAppName#-default)) will be created as active
Calculated state for application<#myAppName#>: none (role: UserInteractiveNonFocal)
Finished acquiring assertion 32-60-106093 (target:[application<#myAppName#>:7754](UIScene:com.apple.frontboard.systemappservices::sceneID%3A#myAppName#-default))
[sceneID:#myAppName#-default] Setting deactivation reasons to: 'appSwitcher,systemAnimation' for reason: updateAllScenesForBand - Assertion added.
[sceneID:#myAppName#-default] Setting deactivation reasons to: 'appSwitcher' for reason: updateAllScenesForBand - Assertion removed.
4.重启我的iPhone后，一切又恢复正常了。
这个bug最近出现好几次了，但我以前没有遇到过这种问题。
这是 SpringBoard 中的错误吗？或者它是我的应用程序中的一个错误，我可以做些什么来修复它？
谢谢。
解决方法
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