Thats in the stack trace and i dont understand this error:
0 CoreFoundation 0x30f57648 ___CFBasicHashFindBucket_Linear_NoCollision + 92
1 CoreFoundation 0x30f59688 __CFBasicHashAddValue + 692
2 CoreFoundation 0x30eaff9f CFDictionarySetValue + 74
3 UIKit 0x35721a0b -[UITouchesEvent _gestureRecognizersForWindow:] + 282
4 UIKit 0x357215d5 -[UIWindow _sendGesturesForEvent:] + 28
5 UIKit 0x357214ab -[UIWindow sendEvent:] + 66
6 UIKit 0x3570a313 -[UIApplication sendEvent:] + 298
7 UIKit 0x35709c53 _UIApplicationHandleEvent + 5090
8 GraphicsServices 0x31a11e77 PurpleEventCallback + 666
9 CoreFoundation 0x30f1ba97 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 26
10 CoreFoundation 0x30f1d83f __CFRunLoopDoSource1 + 166
11 CoreFoundation 0x30f1e60d __CFRunLoopRun + 520
12 CoreFoundation 0x30eaeec3 CFRunLoopRunSpecific + 230
13 CoreFoundation 0x30eaedcb CFRunLoopRunInMode + 58
14 GraphicsServices 0x31a1141f GSEventRunModal + 114
15 GraphicsServices 0x31a114cb GSEventRun + 62
16 UIKit 0x35734d69 -[UIApplication _run] + 404
17 UIKit 0x35732807 UIApplicationMain + 670
18 AppName 0x00002e3b 0x1000 + 7739
The crash occurs sometimes, i dont know on what kind of action it occurs.
How can i understand this issue and can solve my problem?
I think the problem may be that you are re-using gesture objects for more than one UIView based object. They cannot be re-used. I have had similar problems in the past (not exactly the same crash). The documentation on it highlights the limitation. I suppose there is internal state (the hash table seen in the crash) which gets updated in conflicting ways for the different UI View based objects.
If you are not re-using them, try removing all of them temporarily just to confirm the system is otherwise stable.