我正在开发一款跟踪用户的应用。我的应用程序崩溃我们在崩溃循环发生后将应用程序置于后台。应用程序每次启动时都会崩溃。我已经对崩溃日志进行了符号化，但无法找到崩溃的确切原因。符号化的崩溃日志如下所示。任何人都可以告诉我原因吗？
Incident Identifier: 7C3297BB-50EA-4C2A-9F84-FA4A56BC5C3C
CrashReporter Key: 1a78eeb10921ee0a03ccb84ec0c49a835ee54426
Hardware Model: iPhone7,2
Process: myapp_SIT [840]
Path: /private/var/mobile/Containers/Bundle/Applicatio/893B00C1-431B-4CA7-9867-FE9F3B49D5E3/myapp_SIT.app/myapp_SIT
Identifier: com.mycompany.myapp.sit
Version: 2.0.3 (2.0.3)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2015-04-18 13:23:18.039 +0200
Launch Time: 2015-04-18 13:23:17.269 +0200
OS Version: iOS 8.3 (12F70)
Report Version: 105
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x00000000c0000010
Triggered by Thread: 8
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 libsystem_kernel.dylib 0x33656474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x33656269 mach_msg + 37
2 CoreFoundation 0x24a6556f __CFRunLoopServiceMachPort + 143
3 CoreFoundation 0x24a63b15 __CFRunLoopRun + 1013
4 CoreFoundation 0x249b01fd CFRunLoopRunSpecific + 473
5 CoreFoundation 0x249b000f CFRunLoopRunInMode + 103
6 GraphicsServices 0x2c2491fd GSEventRunModal + 133
7 UIKit 0x28154a55 UIApplicationMain + 1437
8 myapp_SIT 0x001c1400 main (AppDelegate.swift:0)
9 libdyld.dylib 0x3359faad start + 1
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x33656224 kevent64 + 24
1 libdispatch.dylib 0x3358b0ed _dispatch_mgr_invoke + 277
2 libdispatch.dylib 0x3357fd37 _dispatch_mgr_thread + 35
Thread 2:
0 libsystem_kernel.dylib 0x3366a9c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x336e5e39 _pthread_wqthread + 789
2 libsystem_pthread.dylib 0x336e5b10 start_wqthread + 4
Thread 3:
0 libsystem_kernel.dylib 0x3366a9c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x336e5e39 _pthread_wqthread + 789
2 libsystem_pthread.dylib 0x336e5b10 start_wqthread + 4
Thread 4:
0 libsystem_kernel.dylib 0x3366a9c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x336e5e39 _pthread_wqthread + 789
2 libsystem_pthread.dylib 0x336e5b10 start_wqthread + 4
Thread 5:
0 libsystem_kernel.dylib 0x3366a9c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x336e5e39 _pthread_wqthread + 789
2 libsystem_pthread.dylib 0x336e5b10 start_wqthread + 4
Thread 6:
0 libsystem_kernel.dylib 0x3366a9c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x336e5e39 _pthread_wqthread + 789
2 libsystem_pthread.dylib 0x336e5b10 start_wqthread + 4
Thread 7:
0 libsystem_kernel.dylib 0x3366a9c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x336e5e39 _pthread_wqthread + 789
2 libsystem_pthread.dylib 0x336e5b10 start_wqthread + 4
Thread 8 name: Dispatch queue: com.apple.root.user-initiated-qos
Thread 8 Crashed:
0 libobjc.A.dylib 0x3302d709 objc_release + 9
1 libobjc.A.dylib 0x3302e1a5 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 401
2 libdispatch.dylib 0x335884cd _dispatch_root_queue_drain + 1721
3 libdispatch.dylib 0x335893bf _dispatch_worker_thread3 + 91
4 libsystem_pthread.dylib 0x336e5dbf _pthread_wqthread + 667
5 libsystem_pthread.dylib 0x336e5b10 start_wqthread + 4
Thread 9 name: com.apple.NSURLConnectionLoader
Thread 9:
0 libsystem_kernel.dylib 0x33656474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x33656269 mach_msg + 37
2 CoreFoundation 0x24a6556f __CFRunLoopServiceMachPort + 143
3 CoreFoundation 0x24a63b15 __CFRunLoopRun + 1013
4 CoreFoundation 0x249b01fd CFRunLoopRunSpecific + 473
5 CoreFoundation 0x249b000f CFRunLoopRunInMode + 103
6 CFNetwork 0x2454e7eb +[NSURLConnection(Loader) _resourceLoadLoop:] + 483
7 Foundation 0x257de3b7 __NSThread__main__ + 1115
8 libsystem_pthread.dylib 0x336e7e21 _pthread_body + 137
9 libsystem_pthread.dylib 0x336e7d93 _pthread_start + 115
10 libsystem_pthread.dylib 0x336e5b1c thread_start + 4
Thread 10:
0 libsystem_kernel.dylib 0x3366a9c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x336e5e39 _pthread_wqthread + 789
2 libsystem_pthread.dylib 0x336e5b10 start_wqthread + 4
Thread 11 name: com.apple.CFSocket.private
Thread 11:
0 libsystem_kernel.dylib 0x3366a080 __select + 20
1 CoreFoundation 0x24a69d61 __CFSocketManager + 533
2 libsystem_pthread.dylib 0x336e7e21 _pthread_body + 137
3 libsystem_pthread.dylib 0x336e7d93 _pthread_start + 115
4 libsystem_pthread.dylib 0x336e5b1c thread_start + 4
Thread 12:
0 libsystem_kernel.dylib 0x33656474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x33656269 mach_msg + 37
2 myapp_SIT 0x002be18f exception_server_thread + 219
3 libsystem_pthread.dylib 0x336e7e21 _pthread_body + 137
4 libsystem_pthread.dylib 0x336e7d93 _pthread_start + 115
5 libsystem_pthread.dylib 0x336e5b1c thread_start + 4
Thread 8 crashed with ARM Thread State (32-bit):
r0: 0x175f6720 r1: 0xc0000000 r2: 0x032c05fc r3: 0x00000fff
r4: 0x032c0000 r5: 0x032ba0a4 r6: 0x032c0000 r7: 0x032b9f7c
r8: 0x032c0028 r9: 0x175ae000 r10: 0xa3a3a3a3 r11: 0x35cad074
ip: 0x35cba124 sp: 0x032b9d58 lr: 0x3302e1a9 pc: 0x3302d708
cpsr: 0x20000030