如何解决由于CPU使用率导致应用程序在后台崩溃
我有一个用SwiftUI编写的锻炼跟踪应用程序。由于我什至不知道代码的哪部分是问题，因此无需深入研究代码，它正在使用CoreLocation获取位置更新，并使用CoreData保存与位置相关的数据。似乎它在前台运行时一切正常，但是在后台运行40分钟-60分钟后，它崩溃了。当我阅读日志时，会看到以下日志。我无法从日志中了解应该在代码中的哪里寻找解决方案？我在占用过多cpu容量的后台执行什么操作，是否保存到CoreData？由于该应用程序在后台运行，因此所有UI更新都应该自动暂停，对吗？您能否在日志中看到一些可以提示我问题所在的信息。
我在Apple上看到此页面：https://developer.apple.com/library/archive/documentation/Performance/Conceptual/EnergyGuide-iOS/WorkLessInTheBackground.html 解决“逃脱后台应用程序崩溃”下的部分，但我看不到日志中引用的内容。你能？有什么建议可以解决我的问题吗？
Data Source: Microstackshots
Shared Cache: 0x26630000 806C7B9F-DF16-345B-9D6C-B3FAB1733341
Command: OutdoorWorkout
Path: /private/var/containers/Bundle/Application/XXXXXXXX-XXXXXXX/OutdoorWorkout.app/OutdoorWorkout
Identifier: WorkoutBundleID
Version: 1.0 (1)
Beta Identifier: 4D39B290-3181-42D0-BC89-10E43C4A441F
PID: 21776
Event: cpu usage
Action taken: Process killed
cpu: 48 seconds cpu time over 59 seconds (82% cpu average),exceeding limit of 80% cpu over 60 seconds
cpu limit: 48s
Limit duration: 60s
cpu used: 48s
cpu duration: 59s
Duration: 58.76s
Duration Sampled: 53.49s
Steps: 11
Hardware model: iPhone12,1
Active cpus: 6
Heaviest stack for the target process:
11 ??? (libdyld.dylib + 4996) [0x1a688b384]
11 ??? (OutdoorWorkout + 138608) [0x100795d70]
11 ??? (UIKitCore + 10938180) [0x1aabc1744]
11 ??? (GraphicsServices + 13772) [0x1b0df05cc]
11 ??? (CoreFoundation + 682952) [0x1a6a0ebc8]
11 ??? (CoreFoundation + 684764) [0x1a6a0f2dc]
11 ??? (CoreFoundation + 683596) [0x1a6a0ee4c]
11 ??? (CoreFoundation + 704796) [0x1a6a1411c]
11 ??? (SwiftUI + 368820) [0x1df0a00b4]
11 ??? (SwiftUI + 368524) [0x1df09ff8c]
11 ??? (SwiftUI + 368668) [0x1df0a001c]
11 ??? (SwiftUI + 1954804) [0x1df2233f4]
11 ??? (SwiftUI + 1841768) [0x1df207a68]
11 ??? (SwiftUI + 4643360) [0x1df4b3a20]
11 ??? (SwiftUI + 1841824) [0x1df207aa0]
11 ??? (SwiftUI + 1841460) [0x1df207934]
11 ??? (SwiftUI + 1842352) [0x1df207cb0]
11 ??? (SwiftUI + 1842940) [0x1df207efc]
11 ??? (AttributeGraph + 37600) [0x1d324c2e0]
11 ??? (AttributeGraph + 17276) [0x1d324737c]
11 ??? (AttributeGraph + 16064) [0x1d3246ec0]
9 ??? (AttributeGraph + 115316) [0x1d325f274]
9 ??? (SwiftUI + 3002020) [0x1df322ea4]
9 ??? (SwiftUI + 3001388) [0x1df322c2c]
9 ??? (OutdoorWorkout + 48056) [0x10077fbb8]
9 ??? (OutdoorWorkout + 48980) [0x10077ff54]
9 ??? (SwiftUI + 3251672) [0x1df35fdd8]
4 ??? (OutdoorWorkout + 50624) [0x1007805c0]
4 ??? (SwiftUI + 4883608) [0x1df4ee498]
4 ??? (OutdoorWorkout + 61856) [0x1007831a0]
4 ??? (SwiftUI + 5396712) [0x1df56b8e8]
4 ??? (OutdoorWorkout + 65172) [0x100783e94]
4 ??? (OutdoorWorkout + 63348) [0x100783774]
4 ??? (OutdoorWorkout + 453660) [0x1007e2c1c]
4 ??? (OutdoorWorkout + 440244) [0x1007df7b4]
4 ??? (OutdoorWorkout + 425960) [0x1007dbfe8]
4 ??? (libswiftCore.dylib + 1299560) [0x1b439d468]
4 ??? (OutdoorWorkout + 462292) [0x1007e4dd4]
4 ??? (OutdoorWorkout + 421692) [0x1007daf3c]
4 ??? (OutdoorWorkout + 428164) [0x1007dc884]
4 ??? (libswiftCore.dylib + 1460088) [0x1b43c4778]
4 ??? (libswiftCore.dylib + 1461172) [0x1b43c4bb4]
4 ??? (libswiftCore.dylib + 353072) [0x1b42b6330]
4 ??? (libswiftCore.dylib + 353312) [0x1b42b6420]
4 ??? (libswiftCore.dylib + 2949328) [0x1b45300d0]
4 ??? (libswiftCore.dylib + 2949284) [0x1b45300a4]
4 ??? (libswiftCore.dylib + 1464092) [0x1b43c571c]
2 ??? (libswiftCore.dylib + 1469228) [0x1b43c6b2c]
1 ??? (libswiftCore.dylib + 505172) [0x1b42db554]
1 ??? (libsystem_malloc.dylib + 45860) [0x1a6781324]
Powerstats for: OutdoorWorkout [21776]
Bundle ID: WorkoutBundleID
Adam ID: 0
Is first party: No
App version: 1.0
Build version: 1
Is Beta: No
Share with Devs: No
UUID: 66A62427-9651-3C4E-8E72-FAAF0682DD5C
Path: /private/var/containers/Bundle/Application/XXXXXXXX-XXXXXXX/OutdoorWorkout.app/OutdoorWorkout
Architecture: arm64
Footprint: 85.62 MB
Start time: 2020-09-06 13:50:39 -0400
End time: 2020-09-06 13:51:33 -0400
Num samples: 11 (100%)
cpu Time: 45.764s
Primary state: 11 samples Non-Frontmost App,Non-Suppressed,User mode,Effective Thread QoS Background,Requested Thread QoS User Interactive,Override Thread QoS Unspecified
User Activity: 11 samples Idle,0 samples Active
Power Source: 11 samples on Battery,0 samples on AC
11 start + 3 (libdyld.dylib + 4996) [0x1a688b384]
11 ??? (OutdoorWorkout + 138608) [0x100795d70]
11 UIApplicationMain + 1935 (UIKitCore + 10938180) [0x1aabc1744]
11 GSEventRunModal + 163 (GraphicsServices + 13772) [0x1b0df05cc]
11 CFRunLoopRunSpecific + 479 (CoreFoundation + 682952) [0x1a6a0ebc8]
11 __CFRunLoopRun + 1003 (CoreFoundation + 684764) [0x1a6a0f2dc]
11 __CFRunLoopDoObservers + 419 (CoreFoundation + 683596) [0x1a6a0ee4c]
11 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 35 (CoreFoundation + 704796) [0x1a6a1411c]
11 @objc closure #1 in static NSRunLoop.addobserver + 55 (SwiftUI + 368820) [0x1df0a00b4]
11 closure #1 in static NSRunLoop.addobserver + 15 (SwiftUI + 368524) [0x1df09ff8c]
11 static NSRunLoop.flushObservers + 135 (SwiftUI + 368668) [0x1df0a001c]
11 thunk for @escaping @callee_guaranteed -> () + 27 (SwiftUI + 1954804) [0x1df2233f4]
11 closure #1 in ViewGraph.asyncTransaction<A> + 147 (SwiftUI + 1841768) [0x1df207a68]
11 VieWrendererHost.updateViewGraph<A> + 91 (SwiftUI + 4643360) [0x1df4b3a20]
11 closure #1 in closure #1 in ViewGraph.asyncTransaction<A> + 23 (SwiftUI + 1841824) [0x1df207aa0]
11 ViewGraph.flushTransactions + 187 (SwiftUI + 1841460) [0x1df207934]
11 closure #1 in ViewGraph.flushTransactions + 255 (SwiftUI + 1842352) [0x1df207cb0]
11 ViewGraph.runTransaction + 215 (SwiftUI + 1842940) [0x1df207efc]
11 AG::Subgraph::update + 727 (AttributeGraph + 37600) [0x1d324c2e0]
11 AG::Graph::update_attribute + 375 (AttributeGraph + 17276) [0x1d324737c]
11 AG::Graph::UpdateStack::update + 447 (AttributeGraph + 16064) [0x1d3246ec0]
9 partial apply + 39 (AttributeGraph + 115316) [0x1d325f274]
9 protocol witness for static UntypedAttribute._update in conformance GeometryReader<A>.Child + 39 (SwiftUI + 3002020) [0x1df322ea4]
9 GeometryReader.Child.update + 403 (SwiftUI + 3001388) [0x1df322c2c]
9 ??? (OutdoorWorkout + 48056) [0x10077fbb8]
9 ??? (OutdoorWorkout + 48980) [0x10077ff54]
9 vstack.init + 183 (SwiftUI + 3251672) [0x1df35fdd8]
4 ??? (OutdoorWorkout + 50624) [0x1007805c0]
4 HStack.init + 183 (SwiftUI + 4883608) [0x1df4ee498]
4 ??? (OutdoorWorkout + 61856) [0x1007831a0]
4 Group<A>.init + 91 (SwiftUI + 5396712) [0x1df56b8e8]
4 ??? (OutdoorWorkout + 65172) [0x100783e94]
4 ??? (OutdoorWorkout + 63348) [0x100783774]
4 ??? (OutdoorWorkout + 453660) [0x1007e2c1c]
4 ??? (OutdoorWorkout + 440244) [0x1007df7b4]
4 ??? (OutdoorWorkout + 425960) [0x1007dbfe8]
4 Sequence.forEach + 479 (libswiftCore.dylib + 1299560) [0x1b439d468]
4 ??? (OutdoorWorkout + 462292) [0x1007e4dd4]
4 ??? (OutdoorWorkout + 421692) [0x1007daf3c]
4 ??? (OutdoorWorkout + 428164) [0x1007dc884]
4 Sequence.sorted + 255 (libswiftCore.dylib + 1460088) [0x1b43c4778]
4 MutableCollection<>.sort + 1027 (libswiftCore.dylib + 1461172) [0x1b43c4bb4]
4 protocol witness for MutableCollection._withUnsafeMutableBufferPointerIfSupported<A> in conformance ContiguousArray<A> + 27 (libswiftCore.dylib + 353072) [0x1b42b6330]
4 ContiguousArray.withContiguousMutableStorageIfAvailable<A> + 195 (libswiftCore.dylib + 353312) [0x1b42b6420]
4 partial apply for thunk for @callee_guaranteed -> (@error @owned Error) + 27 (libswiftCore.dylib + 2949328) [0x1b45300d0]
4 partial apply for closure #1 in MutableCollection<>.sort + 103 (libswiftCore.dylib + 2949284) [0x1b45300a4]
4 UnsafeMutableBufferPointer._stableSortImpl + 703 (libswiftCore.dylib + 1464092) [0x1b43c571c]
2 MutableCollection<>._insertionSort + 1620 (libswiftCore.dylib + 1469228) [0x1b43c6b2c]
1 protocol witness for Collection.subscript.read in conformance [A : B].Keys + 43 (libswiftCore.dylib + 505172) [0x1b42db554]
1 nanov2_free_definite_size + 36 (libsystem_malloc.dylib + 45860) [0x1a6781324]
1 free + 131 (libsystem_malloc.dylib + 65084) [0x1a6785e3c]
1 nanov2_pointer_size + 140 (libsystem_malloc.dylib + 45028) [0x1a6780fe4]
1 MutableCollection<>._insertionSort + 1827 (libswiftCore.dylib + 1469436) [0x1b43c6bfc]
1 _platform_memmove + 0 (libsystem_platform.dylib + 21712) [0x1a679c4d0]
1 MutableCollection<>._insertionSort + 1620 (libswiftCore.dylib + 1469228) [0x1b43c6b2c]
3 ??? (OutdoorWorkout + 51752) [0x100780a28]
3 HStack.init + 183 (SwiftUI + 4883608) [0x1df4ee498]
3 ??? (OutdoorWorkout + 77032) [0x100786ce8]
3 ??? (OutdoorWorkout + 67180) [0x10078466c]
3 vstack.init + 183 (SwiftUI + 3251672) [0x1df35fdd8]
3 ??? (OutdoorWorkout + 72716) [0x100785c0c]
3 ??? (OutdoorWorkout + 68860) [0x100784cfc]
3 Group<A>.init + 91 (SwiftUI + 5396712) [0x1df56b8e8]
3 ??? (OutdoorWorkout + 65172) [0x100783e94]
3 ??? (OutdoorWorkout + 70752) [0x100785460]
3 ??? (OutdoorWorkout + 439112) [0x1007df348]
3 ??? (OutdoorWorkout + 433956) [0x1007ddf24]
3 Sequence.sorted + 255 (libswiftCore.dylib + 1460088) [0x1b43c4778]
3 MutableCollection<>.sort + 1027 (libswiftCore.dylib + 1461172) [0x1b43c4bb4]
3 protocol witness for MutableCollection._withUnsafeMutableBufferPointerIfSupported<A> in conformance ContiguousArray<A> + 27 (libswiftCore.dylib + 353072) [0x1b42b6330]
3 ContiguousArray.withContiguousMutableStorageIfAvailable<A> + 195 (libswiftCore.dylib + 353312) [0x1b42b6420]
3 partial apply for thunk for @callee_guaranteed -> (@error @owned Error) + 27 (libswiftCore.dylib + 2949328) [0x1b45300d0]
3 partial apply for closure #1 in MutableCollection<>.sort + 103 (libswiftCore.dylib + 2949284) [0x1b45300a4]
3 UnsafeMutableBufferPointer._stableSortImpl + 703 (libswiftCore.dylib + 1464092) [0x1b43c571c]
1 MutableCollection<>._insertionSort + 1827 (libswiftCore.dylib + 1469436) [0x1b43c6bfc]
1 DYLD-STUB$$WebCore::BaseAudioSharedUnit::captureFailed (.cold.1) + 0 (WebCore + 30739780) [0x1b04f9d44]
1 MutableCollection<>._insertionSort + 1699 (libswiftCore.dylib + 1469308) [0x1b43c6b7c]
1 ??? (OutdoorWorkout + 462612) [0x1007e4f14]
1 ??? (OutdoorWorkout + 424912) [0x1007dbbd0]
1 swift::Metadataimpl::ValueWitnesses<swift::Metadataimpl::NativeBox<unsigned long long,8ul,8ul> >::destroy + 0 (libswiftCore.dylib + 3235380) [0x1b4575e34]
1 MutableCollection<>._insertionSort + 1375 (libswiftCore.dylib + 1468984) [0x1b43c6a38]
1 protocol witness for Collection.subscript.read in conformance UnsafeMutableBufferPointer<A> + 67 (libswiftCore.dylib + 2479440) [0x1b44bd550]
1 UnsafeMutableBufferPointer.subscript.read + 67 (libswiftCore.dylib + 2479548) [0x1b44bd5bc]
1 malloc + 32 (libsystem_malloc.dylib + 65616) [0x1a6786050]
2 ??? (OutdoorWorkout + 56168) [0x100781b68]
2 Group<A>.init + 91 (SwiftUI + 5396712) [0x1df56b8e8]
2 ??? (OutdoorWorkout + 89672) [0x100789e48]
2 ??? (OutdoorWorkout + 87744) [0x1007896c0]
2 ??? (OutdoorWorkout + 430448) [0x1007dd170]
2 ??? (OutdoorWorkout + 429740) [0x1007dceac]
2 ??? (OutdoorWorkout + 425960) [0x1007dbfe8]
2 Sequence.forEach + 479 (libswiftCore.dylib + 1299560) [0x1b439d468]
2 ??? (OutdoorWorkout + 462292) [0x1007e4dd4]
2 ??? (OutdoorWorkout + 421692) [0x1007daf3c]
2 ??? (OutdoorWorkout + 428164) [0x1007dc884]
2 Sequence.sorted + 255 (libswiftCore.dylib + 1460088) [0x1b43c4778]
2 MutableCollection<>.sort + 1027 (libswiftCore.dylib + 1461172) [0x1b43c4bb4]
2 protocol witness for MutableCollection._withUnsafeMutableBufferPointerIfSupported<A> in conformance ContiguousArray<A> + 27 (libswiftCore.dylib + 353072) [0x1b42b6330]
2 ContiguousArray.withContiguousMutableStorageIfAvailable<A> + 195 (libswiftCore.dylib + 353312) [0x1b42b6420]
2 partial apply for thunk for @callee_guaranteed -> (@error @owned Error) + 27 (libswiftCore.dylib + 2949328) [0x1b45300d0]
2 partial apply for closure #1 in MutableCollection<>.sort + 103 (libswiftCore.dylib + 2949284) [0x1b45300a4]
2 UnsafeMutableBufferPointer._stableSortImpl + 703 (libswiftCore.dylib + 1464092) [0x1b43c571c]
1 MutableCollection<>._insertionSort + 1827 (libswiftCore.dylib + 1469436) [0x1b43c6bfc]
1 objc_msgSend + 32 (libobjc.A.dylib + 6784) [0x1a67aaa80]
1 MutableCollection<>._insertionSort + 1419 (libswiftCore.dylib + 1469028) [0x1b43c6a64]
1 objc_msgSend + 44 (libobjc.A.dylib + 6796) [0x1a67aaa8c]
1 partial apply for protocol witness for static UntypedAttribute._update in conformance DynamicLayoutViewChildGeometry + 35 (SwiftUI + 2017560) [0x1df232918]
1 specialized LayoutQuery<>.update + 187 (SwiftUI + 3582596) [0x1df3b0a84]
1 specialized _Layout.updateOutputAttribute<A> + 271 (SwiftUI + 3588720) [0x1df3b2270]
1 specialized static LayoutComputerDelegate.update<A> + 115 (SwiftUI + 4095736) [0x1df42def8]
1 specialized closure #1 in Hvstack.updateOutput<A> + 47 (SwiftUI + 3493992) [0x1df39b068]
1 specialized closure #1 in Hvstack.updateOutput<A> + 191 (SwiftUI + 3494196) [0x1df39b134]
1 closure #1 in StackLayout.Storage.update + 259 (SwiftUI + 3479700) [0x1df397894]
1 StackLayout.Header.init + 435 (SwiftUI + 3480444) [0x1df397b7c]
1 accumulateSpacing #1 in StackLayout.Header.init(layoutContext:proxies:majorAxis:minorAxisAlignment:uniformSpacing:childStorage:capacity:resizeChildrenWithTrailingOverflow:) + 315 (SwiftUI + 3482316) [0x1df3982cc]
1 LayoutTraitsProxy.spacing + 71 (SwiftUI + 929492) [0x1df128ed4]
1 LayoutComputer.EngineDelegate.spacing + 67 (SwiftUI + 4097740) [0x1df42e6cc]
1 UnaryLayoutEngine.spacing + 79 (SwiftUI + 1704952) [0x1df1e63f8]
1 protocol witness for UnaryLayout.spacing in conformance _PaddingLayout + 43 (SwiftUI + 4472428) [0x1df489e6c]
1 StackLayout.Storage.spacing + 0 (SwiftUI + 3476344) [0x1df396b78]
1 partial apply for specialized protocol witness for static UntypedAttribute._update in conformance UnaryLayoutComputerQuery<A> + 35 (SwiftUI + 1720128) [0x1df1e9f40]
1 specialized UnaryChildGeometryQuery.update + 75 (SwiftUI + 1689492) [0x1df1e2794]
1 AG::Graph::input_value_ref + 140 (AttributeGraph + 61252) [0x1d3251f44]
Binary Images:
0x100774000 - ??? OutdoorWorkout <66A62427-9651-3C4E-8E72-FAAF0682DD5C> /private/var/containers/Bundle/Application/XXXXXXXX-XXXXXXX/OutdoorWorkout.app/OutdoorWorkout
0x1a6776000 - 0x1a6796fff libsystem_malloc.dylib <32E63B4B-0CB6-3798-A0D0-CEB99793BB08> /usr/lib/system/libsystem_malloc.dylib
0x1a6797000 - 0x1a679dfff libsystem_platform.dylib <BF25A4DA-33AF-325F-8C87-36DA4CEF0EFD> /usr/lib/system/libsystem_platform.dylib
0x1a67a9000 - 0x1a67dafff libobjc.A.dylib <B83466F5-56A4-3CA7-BDD1-3E363185282D> /usr/lib/libobjc.A.dylib
0x1a688a000 - 0x1a68befff libdyld.dylib <9DB07277-A537-351D-AB86-5408CB5F12C3> /usr/lib/system/libdyld.dylib
0x1a6968000 - 0x1a6ce4fff CoreFoundation <7769FFAC-4FCD-332D-A4BE-DA2F0E2FFEA5> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
0x1aa153000 - 0x1ab2cbfff UIKitCore <5AD0DCE8-0414-3CF9-97A5-13CED9C31CF7> /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore
0x1ae7a9000 - 0x1b0616fff WebCore <596E181C-ABAC-3774-82DC-993327B74B46> /System/Library/PrivateFrameworks/WebCore.framework/WebCore
0x1b0ded000 - 0x1b0df5fff GraphicsServices <1881CB29-FB7C-30D6-AB2F-F89962BB7055> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices
0x1b4260000 - 0x1b462afff libswiftCore.dylib <EA3DC236-04D9-3F9B-905F-FAEA6CDB5805> /usr/lib/swift/libswiftCore.dylib
0x1d3243000 - 0x1d327ffff AttributeGraph <A382CA95-E8E5-3A77-9E97-F913CE38D4CB> /System/Library/PrivateFrameworks/AttributeGraph.framework/AttributeGraph
0x1df046000 - 0x1df709fff SwiftUI <FC9F7A9B-A496-3884-8C9A-48957BEC5D6E> /System/Library/Frameworks/SwiftUI.framework/SwiftUI
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