如果应用程序未处于后台状态，然后单击通知，我会崩溃。没有内存泄漏和设置架构标准（armv6、armv7、armv7s）。也参考链接
找出解决方案的任何建议。在此先感谢。
设备日志如下：
OS Version: iOS 6.1.3 (10B329)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000024
Crashed Thread: 0
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libdispatch.dylib 0x3936b332 0x3936a000 + 4914
1 CropAndGuess 0x000a92c0 0xa1000 + 33472
2 CropAndGuess 0x000a6252 0xa1000 + 21074
3 CropAndGuess 0x000a551a 0xa1000 + 17690
4 UIKit 0x3313ead4 0x330db000 + 408276
5 UIKit 0x3313e65e 0x330db000 + 407134
6 UIKit 0x33136846 0x330db000 + 374854
7 UIKit 0x330dec34 0x330db000 + 15412
8 UIKit 0x330de6c8 0x330db000 + 14024
9 UIKit 0x330de116 0x330db000 + 12566
10 GraphicsServices 0x34dd05a0 0x34dca000 + 26016
11 CoreFoundation 0x312ab680 0x31214000 + 620160
12 CoreFoundation 0x312aaee4 0x31214000 + 618212
13 CoreFoundation 0x312a9cb2 0x31214000 + 613554
14 CoreFoundation 0x3121ceb8 0x31214000 + 36536
15 CoreFoundation 0x3121cd44 0x31214000 + 36164
16 UIKit 0x33135480 0x330db000 + 369792
17 UIKit 0x331322fc 0x330db000 + 357116
18 CropAndGuess 0x000a3bbc 0xa1000 + 11196
19 CropAndGuess 0x000a3b54 0xa1000 + 11092
Thread 1:
0 libsystem_kernel.dylib 0x39452d98 0x39441000 + 73112
1 libsystem_c.dylib 0x393a0cf6 0x3939a000 + 27894
2 libsystem_c.dylib 0x393a0a12 0x3939a000 + 27154
3 libsystem_c.dylib 0x393a08a0 0x3939a000 + 26784
Thread 2 name: Dispatch queue: com.apple.libdispatch-manager
Thread 2:
0 libsystem_kernel.dylib 0x39442648 0x39441000 + 5704
1 libdispatch.dylib 0x3937b4ec 0x3936a000 + 70892
2 libdispatch.dylib 0x3936ddf4 0x3936a000 + 15860
Thread 3:
0 libsystem_kernel.dylib 0x39452d98 0x39441000 + 73112
1 libsystem_c.dylib 0x393a0cf6 0x3939a000 + 27894
2 libsystem_c.dylib 0x393a0a12 0x3939a000 + 27154
3 libsystem_c.dylib 0x393a08a0 0x3939a000 + 26784
Thread 4 name: WebThread
Thread 4:
0 libsystem_kernel.dylib 0x39441eb4 0x39441000 + 3764
1 libsystem_kernel.dylib 0x39442048 0x39441000 + 4168
2 CoreFoundation 0x312ab040 0x31214000 + 618560
3 CoreFoundation 0x312a9d9e 0x31214000 + 613790
4 CoreFoundation 0x3121ceb8 0x31214000 + 36536
5 CoreFoundation 0x3121cd44 0x31214000 + 36164
6 WebCore 0x3720a500 0x37200000 + 42240
7 libsystem_c.dylib 0x393ab30e 0x3939a000 + 70414
8 libsystem_c.dylib 0x393ab1d4 0x3939a000 + 70100
Thread 0 crashed with ARM Thread State (32-bit):
r0: 0x00000000 r1: 0x1fdaab50 r2: 0x3936c115 r3: 0x1fdaab50
r4: 0x3aefd06c r5: 0x0015a854 r6: 0x00153828 r7: 0x2fd5e4e8
r8: 0x00000001 r9: 0x0000007f r10: 0x38f4f5a1 r11: 0x001538d4
ip: 0x3aefe7f4 sp: 0x2fd5e4b4 lr: 0x000a92c5 pc: 0x3936b332
cpsr: 0x20000030