有没有人对此崩溃日志发生的原因有任何见解？该应用程序记录用户所在的位置。因此它在Info.plist中设置了UIBackgroundModes的位置以继续在后台获取位置更新。根据日志，10分钟后似乎崩溃了。
Incident Identifier: 4BA294E8-0DDF-4EC2-812A-20394F758A7F
CrashReporter Key: 59997a4e160853691bc673802439c8c4b9ca7ba3
Hardware Model: iPhone3,1
Process: MyMapApp [1234]
Path: /var/mobile/Applications/826E35FE-F6B7-477E-943E-CE18D0D03145/MyMapApp.app/MyMapApp
Identifier: MyMapApp
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2011-03-02 13:25:05.228 -0600
OS Version: iPhone OS 4.2.1 (8C148)
Report Version: 104
Exception Type: 00000020
Exception Codes: 0x8badf00d
Highlighted Thread: 0
Application Specific Information:
MyMapApp[1234] has active assertions beyond permitted time:
{(
<SBProcessAssertion: 0x63a07a0> identifier: CoreLocationRegistration process: MyMapApp[1234] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1234 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0xa095050> identifier: CoreLocationBackgroundClient process: MyMapApp[1234] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1234 preventSuspend preventIdleSleep
)}
Elapsed total CPU time (seconds): 43.660 (user 17.920, system 25.740), 7% CPU
Elapsed application CPU time (seconds): 1.500, 0% CPU
Thread 0:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 GraphicsServices 0x33b0e4a4 GSEventRunModal + 108
7 GraphicsServices 0x33b0e550 GSEventRun + 56
8 UIKit 0x32099322 -[UIApplication _run] + 406
9 UIKit 0x32096e8c UIApplicationMain + 664
10 MyMapApp 0x00105546 main (main.m:50)
11 MyMapApp 0x00003f4c start + 44
Thread 1:
0 libSystem.B.dylib 0x33b89974 kevent + 24
1 libSystem.B.dylib 0x33c33704 _dispatch_mgr_invoke + 88
2 libSystem.B.dylib 0x33c33174 _dispatch_queue_invoke + 96
3 libSystem.B.dylib 0x33c32b98 _dispatch_worker_thread2 + 120
4 libSystem.B.dylib 0x33bd724a _pthread_wqthread + 258
5 libSystem.B.dylib 0x33bcf970 start_wqthread + 0
Thread 2:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 WebCore 0x304df124 RunWebThread(void*) + 332
7 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
8 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 3:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 Foundation 0x336465f6 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 206
7 Foundation 0x33624192 -[NSThread main] + 38
8 Foundation 0x3361d242 __NSThread__main__ + 966
9 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
10 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 4:
0 libSystem.B.dylib 0x33bd59f0 __semwait_signal + 24
1 libSystem.B.dylib 0x33b8a7ec _pthread_cond_wait + 748
2 libSystem.B.dylib 0x33b8a3d2 pthread_cond_wait + 26
3 CoreMedia 0x31a41b14 WaitOnCondition + 4
4 CoreMedia 0x31a41a5a FigSemaphoreWaitRelative + 66
5 MediaToolbox 0x300c0c9c fpa_AsyncMovieControlThread + 48
6 CoreMedia 0x31a5df76 figThreadMain + 166
7 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
8 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 5:
0 libSystem.B.dylib 0x33b8168c select$DARWIN_EXTSN + 20
1 CoreFoundation 0x33a7f662 __CFSocketManager + 582
2 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
3 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 6:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 MapKit 0x31be8906 TileCachePrivate::runCacheThread() + 274
7 MapKit 0x31be87ea _runCacheThread(void*) + 2
8 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
9 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 7:
0 libSystem.B.dylib 0x33bd59f0 __semwait_signal + 24
1 libSystem.B.dylib 0x33b8a7ec _pthread_cond_wait + 748
2 libSystem.B.dylib 0x33b8a3d2 pthread_cond_wait + 26
3 QuartzCore 0x3412e5dc CA::DispatchGroup::thread(void*) + 84
4 QuartzCore 0x340fb01a thread_fun + 10
5 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
6 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 8:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 MapKit 0x31bf327e +[NSThread(MKAdditions) _mapkit_runThread:] + 334
7 Foundation 0x33624192 -[NSThread main] + 38
8 Foundation 0x3361d242 __NSThread__main__ + 966
9 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
10 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 9:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 AudioToolbox 0x316504ba GenericRunLoopThread::RunLoop() + 30
7 AudioToolbox 0x31663306 TRunLoop<AQClient>::Entry(void*) + 90
8 AudioToolbox 0x316501d2 CAPThread::Entry(CAPThread*) + 138
9 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
10 libSystem.B.dylib 0x33bcba88 thread_start + 0
Unknown thread crashed with unknown flavor: 5, state_count: 1
答案 0 :(得分：16)
您是否有机会在未拨打相应beginBackgroundTaskWithExpirationHandler:的情况下致电endBackgroundTask:？