iOS Application Crashing

My application crashes with following log, help me in debugging it.

OS Version:          iOS 8.1.1 (12B436)
Report Version:      105

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread:  0

Last Exception Backtrace:
0   CoreFoundation                  0x18211659c 0x181ff0000 + 1205660
1   libobjc.A.dylib                 0x1928680e4 0x192860000 + 32996
2   CoreFoundation                  0x18211d664 0x181ff0000 + 1234532
3   CoreFoundation                  0x18211a418 0x181ff0000 + 1221656
4   CoreFoundation                  0x18201eb6c 0x181ff0000 + 191340
5   UIKit                           0x186cac790 0x1868b8000 + 4147088
6   UIKit                           0x1869a1508 0x1868b8000 + 955656
7   UIKit                           0x1869a127c 0x1868b8000 + 955004
8   UIKit                           0x1869a7efc 0x1868b8000 + 982780
9   UIKit                           0x1868c4f14 0x1868b8000 + 53012
10  UIKit                           0x1868e6350 0x1868b8000 + 189264
11  UIKit                           0x1868c4c2c 0x1868b8000 + 52268
12  UIKit                           0x1868c4c2c 0x1868b8000 + 52268
13  UIKit                           0x1868c4c2c 0x1868b8000 + 52268
14  UIKit                           0x1868c42fc 0x1868b8000 + 49916
15  UIKit                           0x1868c41dc 0x1868b8000 + 49628
16  UIKit                           0x1868cfcbc 0x1868b8000 + 97468
17  UIKit                           0x186ab2e8c 0x1868b8000 + 2076300
18  UIKit                           0x1868d6604 0x1868b8000 + 124420
19  UIKit                           0x186ab2650 0x1868b8000 + 2074192
20  UIKit                           0x186a6c018 0x1868b8000 + 1785880
21  UIKit                           0x18697cf4c 0x1868b8000 + 806732
22  UIKit                           0x18697cd18 0x1868b8000 + 806168
23  UIKit                           0x18697cc98 0x1868b8000 + 806040
24  UIKit                           0x1868c5648 0x1868b8000 + 54856
25  QuartzCore                      0x18621d994 0x186210000 + 55700
26  QuartzCore                      0x186218564 0x186210000 + 34148
27  QuartzCore                      0x186218408 0x186210000 + 33800
28  QuartzCore                      0x186217c08 0x186210000 + 31752
29  QuartzCore                      0x18621798c 0x186210000 + 31116
30  QuartzCore                      0x1862113bc 0x186210000 + 5052
31  CoreFoundation                  0x1820cea50 0x181ff0000 + 911952
32  CoreFoundation                  0x1820cb9dc 0x181ff0000 + 899548
33  CoreFoundation                  0x1820cbdbc 0x181ff0000 + 900540
34  CoreFoundation                  0x181ff90a4 0x181ff0000 + 37028
35  GraphicsServices                0x18b19b5a4 0x18b190000 + 46500
36  UIKit                           0x18692e3c0 0x1868b8000 + 484288
37  Shallys                         0x1000b8f68 0x1000b4000 + 20328
38  libdyld.dylib                   0x192ed6a08 0x192ed4000 + 10760

Thread 0 name:  Dispatch queue: com.apple.main-thread Thread 0

Crashed: 0 libsystem_kernel.dylib 0x0000000192fef270

0x192fd4000 + 111216 1 libsystem_pthread.dylib

I tried with NSZombie however it points to irrevalant code..