title: IOS8 App Crash EXC-CRASH (SIGABRT)
body: <p>i´m creating an app - it works so far, but "sometimes" it crashed. It can happen after 1 hour, 2 hours, 10 minutes. I don´t have an idea, where the problem is. Can someone help me out? Here is the crash log:</p>
  
  <pre><code>Incident Identifier: 41C72E45-2D38-47AF-89A7-1666846B4D13
  CrashReporter Key:   7b23272467a57c9e510d7991d4e1de0661d90c5d
  Hardware Model:      iPhone7,2
  Process:             TQ [15248]
  Path:                /private/var/mobile/Containers/Bundle/Application/F50B5713-F039-48A5-A1F4-E27ACE8FE2B9/TQ.app/TQ
  Identifier:          com.tq.tq
  Version:             5.2995 (5.30)
  Code Type:           ARM-64 (Native)
  Parent Process:      launchd [1]
  
  Date/Time:           2015-05-10 21:14:03.574 +0200
  Launch Time:         2015-05-10 20:58:33.167 +0200
  OS Version:          iOS 8.3 (12F70)
  Report Version:      105
  
  Exception Type:  EXC_CRASH (SIGABRT)
  Exception Codes: 0x0000000000000000, 0x0000000000000000
  Triggered by Thread:  0
  
  Thread 0 name:  Dispatch queue: com.apple.main-thread
  Thread 0 Crashed:
  0   libsystem_kernel.dylib          0x0000000198237270 0x19821c000 + 111216
  1   libsystem_pthread.dylib         0x00000001982d516c 0x1982d0000 + 20844
  2   libsystem_c.dylib               0x00000001981aeb14 0x19814c000 + 404244
  3   libsystem_malloc.dylib          0x00000001982723e0 0x198260000 + 74720
  4   libsystem_malloc.dylib          0x00000001982712f4 0x198260000 + 70388
  5   CoreFoundation                  0x000000018615a44c 0x186154000 + 25676
  6   CoreFoundation                  0x0000000186159f88 0x186154000 + 24456
  7   CoreFoundation                  0x00000001862317d4 0x186154000 + 907220
  8   CoreFoundation                  0x000000018615d2d0 0x186154000 + 37584
  9   GraphicsServices                0x000000018f9736f8 0x18f968000 + 46840
  10  UIKit                           0x000000018ad22fa8 0x18acac000 + 487336
  11  TQ                              0x00000001000c99ac 0x100010000 + 760236
  12  libdyld.dylib                   0x000000019811ea04 0x19811c000 + 10756
  
  Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
  Thread 1:
  0   libsystem_kernel.dylib          0x000000019821cc24 0x19821c000 + 3108
  1   libdispatch.dylib               0x0000000198101e6c 0x1980f0000 + 73324
  2   libdispatch.dylib               0x00000001980f3998 0x1980f0000 + 14744
  
  Thread 2 name:  GAIThread
  Thread 2:
  0   libsystem_kernel.dylib          0x000000019821ce0c 0x19821c000 + 3596
  1   libsystem_kernel.dylib          0x000000019821cc84 0x19821c000 + 3204
  2   CoreFoundation                  0x0000000186233720 0x186154000 + 915232
  3   CoreFoundation                  0x0000000186231674 0x186154000 + 906868
  4   CoreFoundation                  0x000000018615d2d0 0x186154000 + 37584
  5   Foundation                      0x00000001870954c4 0x187088000 + 54468
  6   Foundation                      0x00000001870ef80c 0x187088000 + 423948
  7   TrackQuiz                       0x0000000100230508 0x100010000 + 2229512
  8   Foundation                      0x000000018717ddb4 0x187088000 + 1007028
  9   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  10  libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  11  libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 3 name:  com.apple.coreaudio.AQClient
  Thread 3:
  0   libsystem_kernel.dylib          0x000000019821ce0c 0x19821c000 + 3596
  1   libsystem_kernel.dylib          0x000000019821cc84 0x19821c000 + 3204
  2   CoreFoundation                  0x0000000186233720 0x186154000 + 915232
  3   CoreFoundation                  0x0000000186231674 0x186154000 + 906868
  4   CoreFoundation                  0x000000018615d2d0 0x186154000 + 37584
  5   AudioToolbox                    0x000000018577a278 0x185740000 + 238200
  6   AudioToolbox                    0x000000018576c51c 0x185740000 + 181532
  7   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  8   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  9   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 4 name:  com.apple.NSURLConnectionLoader
  Thread 4:
  0   libsystem_kernel.dylib          0x000000019821ce0c 0x19821c000 + 3596
  1   libsystem_kernel.dylib          0x000000019821cc84 0x19821c000 + 3204
  2   CoreFoundation                  0x0000000186233720 0x186154000 + 915232
  3   CoreFoundation                  0x0000000186231674 0x186154000 + 906868
  4   CoreFoundation                  0x000000018615d2d0 0x186154000 + 37584
  5   CFNetwork                       0x0000000185c3e890 0x185ba0000 + 649360
  6   Foundation                      0x000000018717ddb4 0x187088000 + 1007028
  7   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  8   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  9   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 5 name:  com.apple.CFSocket.private
  Thread 5:
  0   libsystem_kernel.dylib          0x0000000198237498 0x19821c000 + 111768
  1   CoreFoundation                  0x0000000186239124 0x186154000 + 938276
  2   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  3   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  4   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 6:
  0   libsystem_kernel.dylib          0x000000019821ce0c 0x19821c000 + 3596
  1   libsystem_kernel.dylib          0x000000019821cc84 0x19821c000 + 3204
  2   CoreFoundation                  0x0000000186233720 0x186154000 + 915232
  3   CoreFoundation                  0x0000000186231674 0x186154000 + 906868
  4   CoreFoundation                  0x000000018615d2d0 0x186154000 + 37584
  5   CoreFoundation                  0x00000001861af358 0x186154000 + 373592
  6   CoreMotion                      0x0000000186b68364 0x186b20000 + 295780
  7   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  8   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  9   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 7 name:  WebThread
  Thread 7:
  0   libsystem_kernel.dylib          0x000000019821ce0c 0x19821c000 + 3596
  1   libsystem_kernel.dylib          0x000000019821cc84 0x19821c000 + 3204
  2   CoreFoundation                  0x0000000186233720 0x186154000 + 915232
  3   CoreFoundation                  0x0000000186231674 0x186154000 + 906868
  4   CoreFoundation                  0x000000018615d2d0 0x186154000 + 37584
  5   WebCore                         0x0000000194b58890 0x194aa8000 + 723088
  6   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  7   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  8   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 8 name:  JavaScriptCore::BlockFree
  Thread 8:
  0   libsystem_kernel.dylib          0x0000000198237078 0x19821c000 + 110712
  1   libsystem_pthread.dylib         0x00000001982d2f28 0x1982d0000 + 12072
  2   libc++.1.dylib                  0x000000019721ccac 0x197214000 + 36012
  3   JavaScriptCore                  0x0000000187751620 0x187738000 + 103968
  4   JavaScriptCore                  0x000000018774cb9c 0x187738000 + 84892
  5   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  6   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  7   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 9 name:  JavaScriptCore::Marking
  Thread 9:
  0   libsystem_kernel.dylib          0x0000000198237078 0x19821c000 + 110712
  1   libsystem_pthread.dylib         0x00000001982d2f28 0x1982d0000 + 12072
  2   libc++.1.dylib                  0x000000019721ccac 0x197214000 + 36012
  3   JavaScriptCore                  0x00000001879faedc 0x187738000 + 2895580
  4   JavaScriptCore                  0x00000001879faf80 0x187738000 + 2895744
  5   JavaScriptCore                  0x000000018774cb9c 0x187738000 + 84892
  6   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  7   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  8   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 10 name:  WebCore: CFNetwork Loader
  Thread 10:
  0   libsystem_kernel.dylib          0x000000019821ce0c 0x19821c000 + 3596
  1   libsystem_kernel.dylib          0x000000019821cc84 0x19821c000 + 3204
  2   CoreFoundation                  0x0000000186233720 0x186154000 + 915232
  3   CoreFoundation                  0x0000000186231674 0x186154000 + 906868
  4   CoreFoundation                  0x000000018615d2d0 0x186154000 + 37584
  5   WebCore                         0x0000000194b8c9ac 0x194aa8000 + 936364
  6   JavaScriptCore                  0x000000018774cb9c 0x187738000 + 84892
  7   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  8   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  9   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 11 name:  WebCore: LocalStorage
  Thread 11:
  0   libsystem_kernel.dylib          0x0000000198237078 0x19821c000 + 110712
  1   libsystem_pthread.dylib         0x00000001982d2f28 0x1982d0000 + 12072
  2   JavaScriptCore                  0x00000001877517bc 0x187738000 + 104380
  3   WebCore                         0x00000001956e232c 0x194aa8000 + 12821292
  4   WebCore                         0x0000000194c54ff8 0x194aa8000 + 1757176
  5   JavaScriptCore                  0x000000018774cb9c 0x187738000 + 84892
  6   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  7   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  8   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 12 name:  AVAudioSession Notify Thread
  Thread 12:
  0   libsystem_kernel.dylib          0x000000019821ce0c 0x19821c000 + 3596
  1   libsystem_kernel.dylib          0x000000019821cc84 0x19821c000 + 3204
  2   CoreFoundation                  0x0000000186233720 0x186154000 + 915232
  3   CoreFoundation                  0x0000000186231674 0x186154000 + 906868
  4   CoreFoundation                  0x000000018615d2d0 0x186154000 + 37584
  5   libAVFAudio.dylib               0x0000000184bd902c 0x184bc0000 + 102444
  6   libAVFAudio.dylib               0x0000000184bcba0c 0x184bc0000 + 47628
  7   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  8   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  9   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 13 name:  com.apple.coremedia.player.remote
  Thread 13:
  0   libsystem_kernel.dylib          0x000000019821ce0c 0x19821c000 + 3596
  1   libsystem_kernel.dylib          0x000000019821cc84 0x19821c000 + 3204
  2   MediaToolbox                    0x000000018874c848 0x188740000 + 51272
  3   CoreMedia                       0x0000000186a979ac 0x186a5c000 + 244140
  4   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  5   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  6   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 14:
  0   libsystem_kernel.dylib          0x0000000198237c78 0x19821c000 + 113784
  1   libsystem_pthread.dylib         0x00000001982d12d8 0x1982d0000 + 4824
  2   libsystem_pthread.dylib         0x00000001982d0eec 0x1982d0000 + 3820
  
  Thread 15:
  0   libsystem_kernel.dylib          0x0000000198237c78 0x19821c000 + 113784
  1   libsystem_pthread.dylib         0x00000001982d12d8 0x1982d0000 + 4824
  2   libsystem_pthread.dylib         0x00000001982d0eec 0x1982d0000 + 3820
  
  Thread 16:
  0   libsystem_kernel.dylib          0x0000000198237c78 0x19821c000 + 113784
  1   libsystem_pthread.dylib         0x00000001982d12d8 0x1982d0000 + 4824
  2   libsystem_pthread.dylib         0x00000001982d0eec 0x1982d0000 + 3820
  
  Thread 17:
  0   libsystem_kernel.dylib          0x0000000198237c78 0x19821c000 + 113784
  1   libsystem_pthread.dylib         0x00000001982d12d8 0x1982d0000 + 4824
  2   libsystem_pthread.dylib         0x00000001982d0eec 0x1982d0000 + 3820
  
  Thread 18:
  0   libsystem_kernel.dylib          0x0000000198237c78 0x19821c000 + 113784
  1   libsystem_pthread.dylib         0x00000001982d12d8 0x1982d0000 + 4824
  2   libsystem_pthread.dylib         0x00000001982d0eec 0x1982d0000 + 3820
  
  Thread 19 name:  com.apple.coremedia.player.async
  Thread 19:
  0   libsystem_kernel.dylib          0x000000019821ce48 0x19821c000 + 3656
  1   libdispatch.dylib               0x00000001980fff3c 0x1980f0000 + 65340
  2   MediaToolbox                    0x0000000188744b48 0x188740000 + 19272
  3   CoreMedia                       0x0000000186a979ac 0x186a5c000 + 244140
  4   libsystem_pthread.dylib         0x00000001982d3dc4 0x1982d0000 + 15812
  5   libsystem_pthread.dylib         0x00000001982d3d20 0x1982d0000 + 15648
  6   libsystem_pthread.dylib         0x00000001982d0ef4 0x1982d0000 + 3828
  
  Thread 0 crashed with ARM Thread State (64-bit):
      x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000000000000
      x4: 0x0000000000000000   x5: 0x0000000000000000   x6: 0x0000000000000001   x7: 0x0000000000000000
      x8: 0x0000000008000000   x9: 0x0000000004000000  x10: 0x0000000000000000  x11: 0x0000000000000000
     x12: 0x0000000000000035  x13: 0x000000017b700560  x14: 0x000000017056e1c0  x15: 0x00000001745720c0
     x16: 0x0000000000000148  x17: 0x000000018acb5674  x18: 0x0000000000000000  x19: 0x0000000000000006
     x20: 0x000000019c10f310  x21: 0x0000000000000001  x22: 0x0000000198279036  x23: 0x000000017b700550
     x24: 0x0000000000000000  x25: 0x0000000000000001  x26: 0x000000017b700550  x27: 0x000000019873df50
     x28: 0x000000016e836000  fp: 0x000000016fdee220   lr: 0x00000001982d5170
      sp: 0x000000016fdee200   pc: 0x0000000198237270 cpsr: 0x00000000
  </code></pre>