I'm using FMDB in my app. I'm seeing this random crash happening during the app launch.
-(void) addActivities{
[[[DB sharedManager]getSecureQueue] inTransaction:^(FMDatabase * _Nonnull db, BOOL * _Nonnull rollback) {
//process data
}];
}
getSecureQueue returns a FMDatabaseQueue:
_secureQueue= [FMDatabaseQueue databaseQueueWithPath:dbPath];
I checked that _SecureQueue is not nil.
The crash log:
Crashed: fmdb.<FMDatabaseQueue: 0x170242610>
0 libdispatch.dylib 0x18ad83634 _dispatch_barrier_sync_f_slow + 560
1 FMDB 0x101040bd8 -[FMDatabaseQueue beginTransaction:withBlock:] (FMDatabaseQueue.m:228)
2 FMDB 0x101040bd8 -[FMDatabaseQueue beginTransaction:withBlock:] (FMDatabaseQueue.m:228)
3 iPhoneHandheldACT 0x1001e4870 -[HHCTabBarController addActivities] (HHCTabBarController.m:145)
4 iPhoneHandheldACT 0x1001e553c __49-[HHCTabBarController migrateIntoRealm]_block_invoke (HHCTabBarController.m:226)
5 FMDB 0x101040ac4 __30-[FMDatabaseQueue inDatabase:]_block_invoke (FMDatabaseQueue.m:188)
6 libdispatch.dylib 0x18ad729a0 _dispatch_client_callout + 16
7 libdispatch.dylib 0x18ad7fee0 _dispatch_barrier_sync_f_invoke + 84
8 FMDB 0x101040a34 -[FMDatabaseQueue inDatabase:] (FMDatabaseQueue.m:202)
9 iPhoneHandheldACT 0x1001e4ce8 -[HHCTabBarController migrateIntoRealm] (HHCTabBarController.m:181)
10 iPhoneHandheldACT 0x1001e4270 -[HHCTabBarController viewDidLoad] (HHCTabBarController.m:77)
11 UIKit 0x191fecb04 -[UIViewController loadViewIfRequired] + 1036
12 UIKit 0x192004590 -[UIViewController __viewWillAppear:] + 132
13 UIKit 0x192188e18 -[UINavigationController _startCustomTransition:] + 1144
14 UIKit 0x1920a37bc -[UINavigationController _startDeferredTransitionIfNeeded:] + 676
15 UIKit 0x1920a3424 -[UINavigationController __viewWillLayoutSubviews] + 64
16 UIKit 0x1920a3388 -[UILayoutContainerView layoutSubviews] + 188
17 UIKit 0x191fe9cc0 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1200
18 QuartzCore 0x18f1da274 -[CALayer layoutSublayers] + 148
19 QuartzCore 0x18f1cede8 CA::Layer::layout_if_needed(CA::Transaction*) + 292
20 QuartzCore 0x18f1ceca8 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 32
21 QuartzCore 0x18f14a34c CA::Context::commit_transaction(CA::Transaction*) + 252
22 QuartzCore 0x18f1713ac CA::Transaction::commit() + 504
23 QuartzCore 0x18f171e78 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 120
24 CoreFoundation 0x18be689a8 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
25 CoreFoundation 0x18be66630 __CFRunLoopDoObservers + 372
26 CoreFoundation 0x18bd96dc4 CFRunLoopRunSpecific + 456
27 UIFoundation 0x191f95134 -[NSHTMLReader _loadUsingWebKit] + 1764
28 Foundation 0x18c9af50c __NSThreadPerformPerform + 340
29 CoreFoundation 0x18be6942c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
30 CoreFoundation 0x18be68d9c __CFRunLoopDoSources0 + 540
31 CoreFoundation 0x18be669a8 __CFRunLoopRun + 744
32 CoreFoundation 0x18bd96da4 CFRunLoopRunSpecific + 424
33 GraphicsServices 0x18d801074 GSEventRunModal + 100
34 UIKit 0x192051c9c UIApplicationMain + 208
35 iPhoneHandheldACT 0x1000a7bf4 main (main.m:16)
36 libdyld.dylib 0x18ada559c start + 4
On line 8, it looks like you're already inside an inDatabase call (i.e. you're already in FMDatabaseQueue when you try to enter the queue again). Don't try to enter serial queue when you're already inside that serial queue. At best, you'll deadlock. If you do that at the wrong time (e.g. during app startup), the watchdog process will kill your app with exception code 0x8badf00d ("ate bad food"; lol; see Technical Note TN2151: Understanding and Analyzing Application Crash Reports).
Related
I have my app in alpha test, and using fabric to capture the crash logs. I had encountered a crash, and I have the below trace but have no idea what is going on. I tried to reproduce it with Xcode, but hardly can reproduce.
Could any one help on this? or share some ideas?
Thread : Crashed: com.apple.main-thread
0 libsystem_platform.dylib 0x0000000197c7d8d4 OSAtomicCompareAndSwap32Barrier + 12
1 libobjc.A.dylib 0x0000000197468120 realizeClass(objc_class*) + 100
2 libobjc.A.dylib 0x000000019746c930 lookUpImpOrForward + 224
3 libobjc.A.dylib 0x0000000197477db8 _objc_msgSend_uncached_impcache + 56
4 UIKit 0x000000018b66bef4 -[UINavigationController _startCustomTransition:] + 972
5 UIKit 0x000000018b57d630 -[UINavigationController _startDeferredTransitionIfNeeded:] + 468
6 UIKit 0x000000018b57d3fc -[UINavigationController __viewWillLayoutSubviews] + 56
7 UIKit 0x000000018b57d37c -[UILayoutContainerView layoutSubviews] + 200
8 UIKit 0x000000018b4c5d2c -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 572
9 QuartzCore 0x000000018ae1d994 -[CALayer layoutSublayers] + 168
10 QuartzCore 0x000000018ae18564 CA::Layer::layout_if_needed(CA::Transaction*) + 320
11 QuartzCore 0x000000018ae18408 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 32
12 QuartzCore 0x000000018ae17c08 CA::Context::commit_transaction(CA::Transaction*) + 276
13 QuartzCore 0x000000018ae1798c CA::Transaction::commit() + 436
14 UIKit 0x000000018b4c7c48 _UIApplicationHandleEventQueue + 1700
15 CoreFoundation 0x0000000186cd29ec __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
16 CoreFoundation 0x0000000186cd1c90 __CFRunLoopDoSources0 + 264
17 CoreFoundation 0x0000000186ccfd40 __CFRunLoopRun + 712
18 CoreFoundation 0x0000000186bfd0a4 CFRunLoopRunSpecific + 396
19 GraphicsServices 0x000000018fd975a4 GSEventRunModal + 168
20 UIKit 0x000000018b52eaa4 UIApplicationMain + 1488
21 MCompass 0x00000001001631c8 main (main.m:16)
22 libdyld.dylib 0x0000000197ad2a08 start + 4
It is hard to tell without seeing some more details, but maybe this can help: http://aplus.rs/2013/beware-a-crashing-bug-lurks-with-uinavigationcontroller-transitions/
I have been getting a rare crash in my app. I am able to track it via hockey app tool integrated with the app. But, unfortunately i am not able to find out any clue about it so as to resolve it.
The crash is happening in the main method of my application in thread 0. I would like to post the stack trace for better analysis. Here it is.
Thread 0 Crashed:
0 libobjc.A.dylib 0x34ed7f46 _objc_msgSend + 6
1 UIKit 0x2ac884cf -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 472
2 UIKit 0x2ac88593 -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 52
3 UIKit 0x2ac7dd21 -[UITableView _updateVisibleCellsNow:isRecursive:] + 2266
4 UIKit 0x2aa962df -[UITableView layoutSubviews] + 184
5 UIKit 0x2a9c0677 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 512
6 QuartzCore 0x2a3e8ccd -[CALayer layoutSublayers] + 134
7 QuartzCore 0x2a3e46b5 CA::Layer::layout_if_needed(CA::Transaction*) + 358
8 QuartzCore 0x2a3e453d CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 14
9 QuartzCore 0x2a3e3f21 CA::Context::commit_transaction(CA::Transaction*) + 222
10 QuartzCore 0x2a3e3d25 CA::Transaction::commit() + 322
11 UIKit 0x2ac0bc43 _UIWindowUpdateVisibleContextOrder + 208
12 UIKit 0x2ac0bad5 +[UIWindow _prepareWindowsPassingTestForAppResume:] + 14
13 UIKit 0x2ac2c8f3 -[UIApplication _updateSnapshotAndStateRestorationArchiveForBackgroundEvent:saveState:exitIfCouldNotRestoreState:] + 200
14 UIKit 0x2ac2bda3 __80-[UIApplication _handleNonLaunchSpecificActions:forScene:withTransitionContext:]_block_invoke_2 + 112
15 libdispatch.dylib 0x3542b8cb _dispatch_call_block_and_release + 8
16 libdispatch.dylib 0x3542b8b7 _dispatch_client_callout + 20
17 libdispatch.dylib 0x3542f0bf __dispatch_main_queue_callback_4CF + 723
18 CoreFoundation 0x274eabe9 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 6
19 CoreFoundation 0x274e92e9 __CFRunLoopRun + 1510
20 CoreFoundation 0x27437621 _CFRunLoopRunSpecific + 477
21 CoreFoundation 0x27437433 _CFRunLoopRunInMode + 107
22 GraphicsServices 0x2e7bd0a9 _GSEventRunModal + 137
23 UIKit 0x2aa22359 _UIApplicationMain + 1441
The crash being in the main thread, i don't get any clue of where and how to start tracing this crash.
Any help would be highly appreciated.
I have a side panel view (like side drawer) in my iPad app which contains tabbar having 2 tabs. This view is beyond the ipad visible screen and become visible once we pull it from left side. This get initialize always on app launch. It crashes randomly on iOS 7.0.3 and 7.0.4 mostly on iPad 4 models. I can't reproduce it in debug mode while debugger is attached and reproducing frequency is 1% or less on release build.
It will not an iOS issue but any guess or anybody faced and solved similar problem?
Crash report:
Hardware Model: iPad3,4
Code Type: ARM (Native)
OS Version: iOS 7.0.4 (11B554a)
Crash report:
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread: 12
Thread 0:
0 libsystem_kernel.dylib 0x38d7ebb4 syscall_thread_switch + 8
1 libsystem_platform.dylib 0x38df349c _os_lock_handoff_lock_slow + 48
2 libsystem_malloc.dylib 0x38db90f8 szone_free_definite_size + 328
3 libRIP.A.dylib 0x2e4ffb72 ripc_ReleaseClipState + 34
4 libRIP.A.dylib 0x2e503438 ripc_EndLayer + 80
5 CoreGraphics 0x2e1c25e8 CGContextEndTransparencyLayer + 36
6 UIKit 0x309e4d2a -[UIImage(TabBarItemImages) _tabBarItemImageWithTintColor:selected:metrics:style:forScreenScale:] + 902
7 UIKit 0x309e5070 -[UIImage(TabBarItemImages) _unselectedTabBarItemImageWithTintColor:metrics:style:forScreenScale:] + 36
8 UIKit 0x309e4748 -[UITabBarItem(Static) _updateImageWithTintColor:isSelected:getImageOffset:] + 552
9 UIKit 0x309e414c -[UITabBarItem(Static) _createViewForTabBar:showingBadge:withTint:idiom:] + 956
10 UIKit 0x309e3d82 -[UITabBarItem(Static) _createViewForTabBar:showingBadge:idiom:] + 34
11 UIKit 0x309e0028 -[UITabBarItem(Static) _updateViewForIdiom:positionItems:] + 156
12 UIKit 0x309e74ca -[UITabBar(Static) _configureItems:] + 402
13 UIKit 0x309e6b7e -[UITabBar(Static) _positionTabBarButtons:ignoringItem:] + 1270
14 UIKit 0x309e3b38 -[UITabBar setItems:animated:] + 1352
15 UIKit 0x309e3522 -[UITabBarController _rebuildTabBarItemsAnimated:] + 798
16 UIKit 0x309e7a74 -[UITabBarController _setSelectedViewController:] + 72
17 UIKit 0x308cdcf2 +[UIView(Animation) performWithoutAnimation:] + 70
18 UIKit 0x309eb470 -[UITabBarController _selectDefaultViewControllerIfNecessaryWithAppearanceTransitions:] + 216
19 UIKit 0x309ea8e6 -[UITabBarController viewWillAppear:] + 130
20 UIKit 0x308d66fa -[UIViewController _setViewAppearState:isAnimating:] + 342
21 CoreFoundation 0x2e080800 __53-[__NSArrayI enumerateObjectsWithOptions:usingBlock:]_block_invoke + 48
22 CoreFoundation 0x2e07a21a -[__NSArrayI enumerateObjectsWithOptions:usingBlock:] + 218
23 UIKit 0x308d6876 -[UIViewController _setViewAppearState:isAnimating:] + 722
24 UIKit 0x30a4ccfa -[UINavigationController _startCustomTransition:] + 842
25 UIKit 0x3096aa12 -[UINavigationController _startDeferredTransitionIfNeeded:] + 414
26 UIKit 0x3096a81c -[UINavigationController __viewWillLayoutSubviews] + 40
27 UIKit 0x3096a7b4 -[UILayoutContainerView layoutSubviews] + 180
28 UIKit 0x308bc34e -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 342
29 QuartzCore 0x3054293e -[CALayer layoutSublayers] + 138
30 QuartzCore 0x3053e162 CA::Layer::layout_if_needed(CA::Transaction*) + 346
31 QuartzCore 0x3053dff4 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 12
32 QuartzCore 0x3053da08 CA::Context::commit_transaction(CA::Transaction*) + 224
33 QuartzCore 0x3053d81a CA::Transaction::commit() + 310
34 QuartzCore 0x30537548 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 52
35 CoreFoundation 0x2e102f66 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 18
36 CoreFoundation 0x2e1008f2 __CFRunLoopDoObservers + 282
37 CoreFoundation 0x2e100c3e __CFRunLoopRun + 734
38 CoreFoundation 0x2e06b46c CFRunLoopRunSpecific + 520
39 CoreFoundation 0x2e06b24e CFRunLoopRunInMode + 102
40 GraphicsServices 0x32d722e6 GSEventRunModal + 134
41 UIKit 0x30920840 UIApplicationMain + 1132
42 MyApp 0x0006b5f2 0x64000 + 30194
43 libdyld.dylib 0x38cdaab4 start + 0
Thread 12 Crashed:
0 libsystem_kernel.dylib 0x38d911fc __pthread_kill + 8
1 libsystem_pthread.dylib 0x38df8a4e pthread_kill + 54
2 libsystem_c.dylib 0x38d42082 __abort + 74
3 libsystem_c.dylib 0x38d42034 abort + 84
4 libsystem_malloc.dylib 0x38dbf758 szone_error + 312
5 libsystem_malloc.dylib 0x38dbf9d4 free_list_checksum_botch + 24
6 libsystem_malloc.dylib 0x38dba1a4 tiny_free_list_remove_ptr + 76
7 libsystem_malloc.dylib 0x38db9770 szone_free_definite_size + 1984
8 libsystem_blocks.dylib 0x38cf7ac2 _Block_release + 214
9 libdispatch.dylib 0x38ccae76 _dispatch_queue_drain + 370
10 libdispatch.dylib 0x38cc7f8e _dispatch_queue_invoke + 38
11 libdispatch.dylib 0x38ccb742 _dispatch_root_queue_drain + 74
12 libdispatch.dylib 0x38ccb9c0 _dispatch_worker_thread2 + 52
13 libsystem_pthread.dylib 0x38df5dfc _pthread_wqthread + 296
14 libsystem_pthread.dylib 0x38df5cc0 start_wqthread + 4
Another random crash in similar case:
Thread 0 Crashed:
0 CoreFoundation 0x311e9728 -[__NSDictionaryM objectForKey:] + 100
1 UIKit 0x33a3e855 -[UILabel _setFont:] + 209
2 UIKit 0x33b5a411 -[UITabBarButton initWithImage:selectedImage:label:withInsets:] + 293
3 UIKit 0x33b59223 -[UITabBarItem(Static) _createViewForTabBar:showingBadge:withTint:idiom:] + 1171
4 UIKit 0x33b58d87 -[UITabBarItem(Static) _createViewForTabBar:showingBadge:idiom:] + 39
5 UIKit 0x33b5502d -[UITabBarItem(Static) _updateViewForIdiom:positionItems:] + 161
6 UIKit 0x33b5c4cf -[UITabBar(Static) _configureItems:] + 407
7 UIKit 0x33b5bb83 -[UITabBar(Static) _positionTabBarButtons:ignoringItem:] + 1275
8 UIKit 0x33b58b3d -[UITabBar setItems:animated:] + 1357
9 UIKit 0x33b58527 -[UITabBarController _rebuildTabBarItemsAnimated:] + 803
10 UIKit 0x33b5ca79 -[UITabBarController _setSelectedViewController:] + 77
11 UIKit 0x33a42cf5 +[UIView(Animation) performWithoutAnimation:] + 73
12 UIKit 0x33b60475 -[UITabBarController _selectDefaultViewControllerIfNecessaryWithAppearanceTransitions:] + 221
13 UIKit 0x33b5f8eb -[UITabBarController viewWillAppear:] + 135
14 UIKit 0x33a4b6ff -[UIViewController _setViewAppearState:isAnimating:] + 347
15 CoreFoundation 0x311f5803 __53-[__NSArrayI enumerateObjectsWithOptions:usingBlock:]_block_invoke + 51
16 CoreFoundation 0x311ef21d -[__NSArrayI enumerateObjectsWithOptions:usingBlock:] + 221
17 UIKit 0x33a4b87b -[UIViewController _setViewAppearState:isAnimating:] + 727
18 UIKit 0x33bc1cff -[UINavigationController _startCustomTransition:] + 847
19 UIKit 0x33adfa17 -[UINavigationController _startDeferredTransitionIfNeeded:] + 419
20 UIKit 0x33adf821 -[UINavigationController __viewWillLayoutSubviews] + 45
21 UIKit 0x33adf7b9 -[UILayoutContainerView layoutSubviews] + 185
22 UIKit 0x33a31353 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 347
23 QuartzCore 0x336b7943 -[CALayer layoutSublayers] + 143
24 QuartzCore 0x336b3167 CA::Layer::layout_if_needed(CA::Transaction*) + 351
25 QuartzCore 0x336b2ff9 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 17
26 QuartzCore 0x336b2a0d CA::Context::commit_transaction(CA::Transaction*) + 229
27 QuartzCore 0x336b281f CA::Transaction::commit() + 315
28 QuartzCore 0x336ac54d CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 57
29 CoreFoundation 0x31277f69 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 21
30 CoreFoundation 0x312758f7 __CFRunLoopDoObservers + 287
31 CoreFoundation 0x31275c43 __CFRunLoopRun + 739
32 CoreFoundation 0x311e0471 CFRunLoopRunSpecific + 525
33 CoreFoundation 0x311e0253 CFRunLoopRunInMode + 107
34 GraphicsServices 0x35ee12eb GSEventRunModal + 139
35 UIKit 0x33a95845 UIApplicationMain + 1137
36 SofTestM 0x000545f7 0x4d000 + 30199
The second crash is at time of setting font at
UITabBar-->UITabBarButton->UILabel (of UITabBarButton) _setFont:
I feel this random crashes might be due to memory leaks in your application.Pardon me if i am wrong.
In your logs it is seen that you use CoreGraphics.Releasing Core Graphics( even if you have ARC) is a bit tricky as it is not 100% memory leaf proof .That is it at times takes a while to get released.
So suppose you are using core graphic objects whithin a loop then it is certain that your ipad memory will go out of bounds.
Thread 0: Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x3a6285b0 objc_msgSend + 15
1 UIKit 0x348285f5 -[UINavigationController _startTransition:fromViewController:toViewController:] + 92
2 UIKit 0x348284c1 -[UINavigationController _startDeferredTransitionIfNeeded:] + 324
3 UIKit 0x347f94e9 -[UILayoutContainerView layoutSubviews] + 180
4 UIKit 0x347b8803 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 258
5 QuartzCore 0x34562d8b -[CALayer layoutSublayers] + 214
6 QuartzCore 0x34562929 CA::Layer::layout_if_needed(CA::Transaction*) + 460
7 QuartzCore 0x3456385d CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 16
8 QuartzCore 0x34563243 CA::Context::commit_transaction(CA::Transaction*) + 238
9 QuartzCore 0x34563051 CA::Transaction::commit() + 316
10 UIKit 0x34988369 -[UIApplication _sendOrderedOutContextsAndInvalidate:] + 112
11 UIKit 0x3483863f orderOutContextObserverCallout + 34
12 CoreFoundation 0x329826cd __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 20
13 CoreFoundation 0x329809c1 __CFRunLoopDoObservers + 276
14 CoreFoundation 0x32980c91 __CFRunLoopRun + 608
15 CoreFoundation 0x328f3ebd CFRunLoopRunSpecific + 356
16 CoreFoundation 0x328f3d49 CFRunLoopRunInMode + 104
17 GraphicsServices 0x364a62eb GSEventRunModal + 74
18 UIKit 0x34809301 UIApplicationMain + 1120
19 test 0x000f610f main (main.m:16)
I get this error in my crashlytics but not able to reproduce this error. Can any one help me to solve this how can i get rid of this crash.
I have been trying to figure out what is causing one of the top crashes in my iOS application. It looks like there is some layout happening on a background thread which is causing it to crash. Is there any way to determine what I might be doing that is triggering this relayout? I assume from the stack that it is related to a UIWebView when my app is being brought back into the foreground.
Other stackoverflow threads on the topic seem to mention things like triggering a table reload on a background thread. As far as I can see all the webView delegate methods get called on the main thread. Is there some case where this is not true or are there some other methods which get called on a background thread and I'm just not aware?
Web Thread - Crashed.
0 WebCore _WebTryThreadLock(bool) + 297
1 WebCore _WebTryThreadLock(bool) + 288
2 WebCore WebThreadLock + 66
3 UIKit -[UIWebDocumentView(UIWebDocumentViewTextSelecting) selectionBaseWritingDirection] + 10
4 UIKit -[UITextField _currentTextAlignment] + 86
5 UIKit -[UITextField _showsClearButtonWhenNonEmpty:] + 58
6 UIKit -[UITextField _textRectForBounds:forEditing:] + 678
7 UIKit -[UITextField editingRectForBounds:] + 52
8 UIKit -[UITextField editRect] + 70
9 UIKit -[UITextField layoutSubviews] + 1320
10 UIKit -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 258
11 QuartzCore -[CALayer layoutSublayers] + 214
12 QuartzCore CA::Layer::layout_if_needed(CA::Transaction*) + 460
13 QuartzCore CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 16
14 QuartzCore CA::Context::commit_transaction(CA::Transaction*) + 238
15 QuartzCore CA::Transaction::commit() + 316
16 QuartzCore CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 60
17 CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 20
18 CoreFoundation __CFRunLoopDoObservers + 276
19 CoreFoundation CFRunLoopRunSpecific + 394
20 CoreFoundation CFRunLoopRunInMode + 104
21 WebCore RunWebThread(void*) + 444
22 libsystem_c.dylib pthread_start + 308
Main - Thread
0 libsystem_kernel.dylib __psynch_mutexwait + 24
1 libsystem_c.dylib pthread_mutex_lock + 392
2 WebCore _WebTryThreadLock(bool) + 336
3 WebCore WebThreadLock + 66
4 WebKit -[WebDatabasePauser applicationWillEnterForeground] + 16
5 CoreFoundation _CFXNotificationPost + 1426
6 Foundation -[NSNotificationCenter postNotificationName:object:userInfo:] + 72
7 UIKit -[UIApplication _sendWillEnterForegroundCallbacks] + 154
8 UIKit -[UIApplication _handleApplicationResumeEvent:] + 1094
9 UIKit -[UIApplication handleEvent:withNewEvent:] + 1292
10 UIKit -[UIApplication sendEvent:] + 72
11 UIKit _UIApplicationHandleEvent + 6154
12 GraphicsServices _PurpleEventCallback + 590
13 CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14
14 CoreFoundation __CFRunLoopDoSources0 + 212
15 CoreFoundation __CFRunLoopRun + 646
16 CoreFoundation CFRunLoopRunSpecific + 356
17 CoreFoundation CFRunLoopRunInMode + 104
18 GraphicsServices GSEventRunModal + 74
19 UIKit UIApplicationMain + 1120
20 AppName main.m line 23
It seems you are updating UI on the background thread, in your code add this line wherever you are updating your UI and you are fetching data on the background thread:
dispatch_async(dispatch_get_main_queue(), ^{
// Update data here
});
As soon as you, rather code feels that data is there on device and it's time to update the UI corresponding to new data then try and bring back main thread in action.
Hope it helps.