我们使用crashlytics进行崩溃报告，并在0x0000000c处看到以下EXC_BAD_ACCESS KERN_INVALID_ADDRESS：
Thread : Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x3ad10b26 objc_msgSend + 5
1 Fandor 0x000e6463 -[GCKDeviceManager appDidEnterBackground] (GCKDeviceManager.m:238)
2 CoreFoundation 0x30606119 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
3 CoreFoundation 0x3057a257 _CFXNotificationPost + 1718
4 Foundation 0x30f5fc2d -[NSNotificationCenter postNotificationName:object:userInfo:] + 76
5 UIKit 0x32e3a681 -[UIApplication _handleApplicationSuspend:eventInfo:] + 908
6 UIKit 0x32dbbae1 -[UIApplication handleEvent:withNewEvent:] + 764
7 UIKit 0x32dbb721 -[UIApplication sendEvent:] + 72
8 UIKit 0x32e20b3d _UIApplicationHandleEvent + 664
9 GraphicsServices 0x3524c70d _PurpleEventCallback + 608
10 GraphicsServices 0x3524c2f7 PurpleEventCallback + 34
11 CoreFoundation 0x3060e9df __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 34
12 CoreFoundation 0x3060e97b __CFRunLoopDoSource1 + 346
13 CoreFoundation 0x3060d14f __CFRunLoopRun + 1398
14 CoreFoundation 0x30577c27 CFRunLoopRunSpecific + 522
15 CoreFoundation 0x30577a0b CFRunLoopRunInMode + 106
16 GraphicsServices 0x3524b283 GSEventRunModal + 138
17 UIKit 0x32e1b049 UIApplicationMain + 1136
18 Fandor 0x00064387 main (main.m:16)
有什么想法吗？