很少有可重复的崩溃，这种情况主要发生在我将应用程序留在后台一段时间并返回前景时。
据我所知 - 崩溃与UIWebView有关，但并不十分清楚它的性质。我没有使用任何动画。
有人见过这样的事吗？
我在这里发现了类似的帖子： UIWebView random crash at [UIViewAnimationState release]: message sent to deallocated instance
iPhone 4s iOS 8.1
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 libsystem_kernel.dylib 0x3128d518 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3128d30c mach_msg + 36
2 CoreFoundation 0x233a6ba6 __CFRunLoopServiceMachPort + 142
3 CoreFoundation 0x233a516c __CFRunLoopRun + 1012
4 CoreFoundation 0x232f297c CFRunLoopRunSpecific + 472
5 CoreFoundation 0x232f278e CFRunLoopRunInMode + 102
6 GraphicsServices 0x2a6cb04c GSEventRunModal + 132
7 UIKit 0x268e497c UIApplicationMain + 1436
8 Demo 0x00034f44 main (main.m:15)
9 libdyld.dylib 0x311dbaac start + 0
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x3128d2c8 kevent64 + 24
1 libdispatch.dylib 0x311afe44 _dispatch_mgr_invoke + 276
2 libdispatch.dylib 0x311afb76 _dispatch_mgr_thread$VARIANT$mp + 34
Thread 2:
0 libsystem_kernel.dylib 0x312a19cc __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x3131de9c _pthread_wqthread + 788
2 libsystem_pthread.dylib 0x3131db74 start_wqthread + 4
Thread 3:
0 libsystem_kernel.dylib 0x312a19cc __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x3131de9c _pthread_wqthread + 788
2 libsystem_pthread.dylib 0x3131db74 start_wqthread + 4
Thread 4:
0 libsystem_kernel.dylib 0x312a19cc __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x3131de9c _pthread_wqthread + 788
2 libsystem_pthread.dylib 0x3131db74 start_wqthread + 4
Thread 5 name: WebThread
Thread 5 Crashed:
0 libobjc.A.dylib 0x30c4bf66 objc_msgSend + 6
1 CoreFoundation 0x232e665c CFRelease + 592
2 QuartzCore 0x262acfc0 CA::release_objects(X::List<void const*>*) + 12
3 QuartzCore 0x262b22fe -[CAAnimation dealloc] + 50
4 libobjc.A.dylib 0x30c59d52 objc_object::sidetable_release(bool) + 162
5 libobjc.A.dylib 0x30c5a1a4 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 400
6 CoreFoundation 0x232f2704 _CFAutoreleasePoolPop + 12
7 Foundation 0x24033e0a -[NSAutoreleasePool drain] + 118
8 CFNetwork 0x22f07944 AutoAutoreleasePool::~AutoAutoreleasePool() + 20
9 CFNetwork 0x22eeb928 ___ZN27URLConnectionClient_Classic18_withDelegateAsyncEPKcU13block_pointerFvP16_CFURLConnectionPK33CFURLConnectionClientCurrent_VMaxE_block_invoke_2 + 160
10 CFNetwork 0x22e40186 RunloopBlockContext::_invoke_block(void const*, void*) + 58
11 CoreFoundation 0x232f23ee CFArrayApplyFunction + 34
12 CFNetwork 0x22e4003e RunloopBlockContext::perform() + 178
13 CFNetwork 0x22e3ff06 MultiplexerSource::perform() + 214
14 CFNetwork 0x22e3fda0 MultiplexerSource::_perform(void*) + 44
15 CoreFoundation 0x233a75e4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 12
16 CoreFoundation 0x233a69f6 __CFRunLoopDoSources0 + 218
17 CoreFoundation 0x233a5074 __CFRunLoopRun + 764
18 CoreFoundation 0x232f297c CFRunLoopRunSpecific + 472
19 CoreFoundation 0x232f278e CFRunLoopRunInMode + 102
20 WebCore 0x2e6ae24c RunWebThread(void*) + 412
21 libsystem_pthread.dylib 0x3131fe64 _pthread_body + 136
22 libsystem_pthread.dylib 0x3131fdd6 _pthread_start + 114
23 libsystem_pthread.dylib 0x3131db80 thread_start + 4
Thread 6:
0 libsystem_kernel.dylib 0x312a19cc __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x3131de9c _pthread_wqthread + 788
2 libsystem_pthread.dylib 0x3131db74 start_wqthread + 4
Thread 7:
0 libsystem_kernel.dylib 0x312a19cc __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x3131de9c _pthread_wqthread + 788
2 libsystem_pthread.dylib 0x3131db74 start_wqthread + 4
Thread 8 name: JavaScriptCore::BlockFree
Thread 8:
0 libsystem_kernel.dylib 0x312a0b38 __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x3131f3dc _pthread_cond_wait + 516
2 libsystem_pthread.dylib 0x313202ec pthread_cond_timedwait + 40
3 libc++.1.dylib 0x30407074 std::__1::condition_variable::__do_timed_wait(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::time_point<std::__1::chrono::system_clock, std::__1::chrono::duration<long long, std::__1::ratio<1ll, 1000000000ll> > >) + 180
4 JavaScriptCore 0x246d87ec std::__1::cv_status std::__1::condition_variable::wait_for<long long, std::__1::ratio<1ll, 1000ll> >(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::duration<long long, std::__1::ratio<1ll, 1000ll> > const&) + 196
5 JavaScriptCore 0x245b3f16 JSC::BlockAllocator::blockFreeingThreadMain() + 82
6 JavaScriptCore 0x245b044c WTF::wtfThreadEntryPoint(void*) + 12
7 libsystem_pthread.dylib 0x3131fe64 _pthread_body + 136
8 libsystem_pthread.dylib 0x3131fdd6 _pthread_start + 114
9 libsystem_pthread.dylib 0x3131db80 thread_start + 4
Thread 9 name: JavaScriptCore::Marking
Thread 9:
0 libsystem_kernel.dylib 0x312a0b38 __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x3131f3dc _pthread_cond_wait + 516
2 libsystem_pthread.dylib 0x313202ac pthread_cond_wait + 36
3 libc++.1.dylib 0x30406fa4 std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 32
4 JavaScriptCore 0x24778b60 JSC::GCThread::waitForNextPhase() + 100
5 JavaScriptCore 0x24778bc4 JSC::GCThread::gcThreadMain() + 48
6 JavaScriptCore 0x245b044c WTF::wtfThreadEntryPoint(void*) + 12
7 libsystem_pthread.dylib 0x3131fe64 _pthread_body + 136
8 libsystem_pthread.dylib 0x3131fdd6 _pthread_start + 114
9 libsystem_pthread.dylib 0x3131db80 thread_start + 4
Thread 10 name: com.apple.NSURLConnectionLoader
Thread 10:
0 libsystem_kernel.dylib 0x3128d518 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3128d30c mach_msg + 36
2 CoreFoundation 0x233a6ba6 __CFRunLoopServiceMachPort + 142
3 CoreFoundation 0x233a516c __CFRunLoopRun + 1012
4 CoreFoundation 0x232f297c CFRunLoopRunSpecific + 472
5 CoreFoundation 0x232f278e CFRunLoopRunInMode + 102
6 CFNetwork 0x22ea79da +[NSURLConnection(Loader) _resourceLoadLoop:] + 482
7 Foundation 0x240f2996 __NSThread__main__ + 1114
8 libsystem_pthread.dylib 0x3131fe64 _pthread_body + 136
9 libsystem_pthread.dylib 0x3131fdd6 _pthread_start + 114
10 libsystem_pthread.dylib 0x3131db80 thread_start + 4
Thread 11 name: com.apple.CFSocket.private
Thread 11:
0 libsystem_kernel.dylib 0x312a108c __select + 20
1 CoreFoundation 0x233ab32e __CFSocketManager + 486
2 libsystem_pthread.dylib 0x3131fe64 _pthread_body + 136
3 libsystem_pthread.dylib 0x3131fdd6 _pthread_start + 114
4 libsystem_pthread.dylib 0x3131db80 thread_start + 4
Thread 12 name: WebCore: CFNetwork Loader
Thread 12:
0 libsystem_kernel.dylib 0x3128d518 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3128d30c mach_msg + 36
2 CoreFoundation 0x233a6ba6 __CFRunLoopServiceMachPort + 142
3 CoreFoundation 0x233a516c __CFRunLoopRun + 1012
4 CoreFoundation 0x232f297c CFRunLoopRunSpecific + 472
5 CoreFoundation 0x232f278e CFRunLoopRunInMode + 102
6 WebCore 0x2e6d7558 WebCore::runLoaderThread(void*) + 288
7 JavaScriptCore 0x245b044c WTF::wtfThreadEntryPoint(void*) + 12
8 libsystem_pthread.dylib 0x3131fe64 _pthread_body + 136
9 libsystem_pthread.dylib 0x3131fdd6 _pthread_start + 114
10 libsystem_pthread.dylib 0x3131db80 thread_start + 4
Thread 13 name: com.apple.coremedia.player.async
Thread 13:
0 libsystem_kernel.dylib 0x3128d568 semaphore_wait_trap + 8
1 libdispatch.dylib 0x311ad4e6 _dispatch_semaphore_wait_slow + 186
2 MediaToolbox 0x24da843e fpa_AsyncMovieControlThread + 1962
3 CoreMedia 0x23b4ce74 figThreadMain + 184
4 libsystem_pthread.dylib 0x3131fe64 _pthread_body + 136
5 libsystem_pthread.dylib 0x3131fdd6 _pthread_start + 114
6 libsystem_pthread.dylib 0x3131db80 thread_start + 4
Thread 14 name: AVAudioSession Notify Thread
Thread 14:
0 libsystem_kernel.dylib 0x3128d518 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3128d30c mach_msg + 36
2 CoreFoundation 0x233a6ba6 __CFRunLoopServiceMachPort + 142
3 CoreFoundation 0x233a516c __CFRunLoopRun + 1012
4 CoreFoundation 0x232f297c CFRunLoopRunSpecific + 472
5 CoreFoundation 0x232f278e CFRunLoopRunInMode + 102
6 libAVFAudio.dylib 0x220163e8 GenericRunLoopThread::Entry(void*) + 128
7 libAVFAudio.dylib 0x220088e4 CAPThread::Entry(CAPThread*) + 192
8 libsystem_pthread.dylib 0x3131fe64 _pthread_body + 136
9 libsystem_pthread.dylib 0x3131fdd6 _pthread_start + 114
10 libsystem_pthread.dylib 0x3131db80 thread_start + 4
Thread 5 crashed with ARM Thread State (32-bit):
r0: 0x14591630 r1: 0x2dc13dbd r2: 0x315aff18 r3: 0xeb959ea0
r4: 0x61459630 r5: 0x14591634 r6: 0x14591630 r7: 0x029e2bec
r8: 0x315a8b2c r9: 0x81459318 r10: 0x3395a600 r11: 0x3395a980
ip: 0x315847f4 sp: 0x029e2ba4 lr: 0x232e6661 pc: 0x30c4bf66
cpsr: 0x70000030