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我在这里看到了这个线程,我怀疑我的问题是后台线程上发生了一些事情,而 ARC 没有按应有的方式处理它。我正在使用 Parse sdk,它使用 [myObject saveInBackground] 或 [myObject saveEventually] 等调用在后台保存和查找数据库中的对象。我无权访问源来编辑这些方法以包含@autoreleasepool。我假设如果我尝试做这样的事情:

@autoreleasepool{
  [myObject saveInBackground];
  [myObject2 saveEventually];
}

它仍然会在主线程而不是后台线程上执行自动释放池。

每隔一段时间,我的应用程序就会崩溃,并且没有真正的模式,这就是为什么我认为这是一个内存问题,但我正在使用 ARC 并且不知道为什么我会偶尔崩溃。

编辑 * 这里是崩溃日志。这是我第一次看这些。对我放轻松。

Exception Type:  00000020
Exception Codes: 0x000000008badf00d
Highlighted Thread:  0

Application Specific Information:
com.graphiteGames.Capture-This failed to launch in time

Elapsed total CPU time (seconds): 6.470 (user 6.470, system 0.000), 32% CPU 
Elapsed application CPU time (seconds): 0.745, 4% CPU

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0:
0   libsystem_kernel.dylib          0x33fc40fc __psynch_mutexwait + 24
1   libsystem_c.dylib               0x35438124 pthread_mutex_lock + 388
2   Capture This                    0x000dcb62 -[PFObject objectId] (PFObject.m:1174)
3   Capture This                    0x000c67a4 -[RootTableView refreshGameData] (RootTableView.m:78)
4   Capture This                    0x000c6362 -[RootTableView viewDidLoad] (RootTableView.m:33)
5   UIKit                           0x37f1d588 -[UIViewController loadViewIfRequired] + 360
6   UIKit                           0x37f7212e -[UIViewController contentScrollView] + 22
7   UIKit                           0x37f72074 -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 24
8   UIKit                           0x37f71f58 -[UINavigationController _layoutViewController:] + 28
9   UIKit                           0x37f71e7c -[UINavigationController _updateScrollViewFromViewController:toViewController:] + 268
10  UIKit                           0x37f715bc -[UINavigationController _startTransition:fromViewController:toViewController:] + 60
11  UIKit                           0x37f714a4 -[UINavigationController _startDeferredTransitionIfNeeded:] + 320
12  UIKit                           0x37f424dc -[UILayoutContainerView layoutSubviews] + 176
13  UIKit                           0x37f017fe -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 254
14  QuartzCore                      0x30db5d5e -[CALayer layoutSublayers] + 210
15  QuartzCore                      0x30db58fc CA::Layer::layout_if_needed(CA::Transaction*) + 456
16  QuartzCore                      0x30de47a2 -[CALayer layoutIfNeeded] + 138
17  UIKit                           0x37fab0c4 -[UIViewController window:setupWithInterfaceOrientation:] + 204
18  UIKit                           0x37faa2b0 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:isRotating:] + 3616
19  UIKit                           0x37fa9482 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:] + 42
20  UIKit                           0x37fa940c -[UIWindow _setRotatableViewOrientation:duration:force:] + 64
21  UIKit                           0x380df17c __57-[UIWindow _updateToInterfaceOrientation:duration:force:]_block_invoke_0 + 100
22  UIKit                           0x37f67676 -[UIWindow _updateToInterfaceOrientation:duration:force:] + 214
23  UIKit                           0x37f673b8 -[UIWindow setAutorotates:forceUpdateInterfaceOrientation:] + 688
24  UIKit                           0x37f66d26 -[UIViewController _tryBecomeRootViewControllerInWindow:] + 154
25  UIKit                           0x37f5de9e -[UIWindow addRootViewControllerViewIfPossible] + 366
26  UIKit                           0x37f59ae0 -[UIWindow _setHidden:forced:] + 360
27  UIKit                           0x37f9b1c4 -[UIWindow makeKeyAndVisible] + 56
28  UIKit                           0x37f5e832 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1662
29  UIKit                           0x37f5683e -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 694
30  UIKit                           0x37efec34 -[UIApplication handleEvent:withNewEvent:] + 1000
31  UIKit                           0x37efe6c8 -[UIApplication sendEvent:] + 68
32  UIKit                           0x37efe116 _UIApplicationHandleEvent + 6150
33  GraphicsServices                0x34b1e5a0 _PurpleEventCallback + 588
34  GraphicsServices                0x34b1e1ce PurpleEventCallback + 30
35  CoreFoundation                  0x35e34170 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32
36  CoreFoundation                  0x35e34112 __CFRunLoopDoSource1 + 134
37  CoreFoundation                  0x35e32f94 __CFRunLoopRun + 1380
38  CoreFoundation                  0x35da5eb8 CFRunLoopRunSpecific + 352
39  CoreFoundation                  0x35da5d44 CFRunLoopRunInMode + 100
40  UIKit                           0x37f55478 -[UIApplication _run] + 664
41  UIKit                           0x37f522f4 UIApplicationMain + 1116
42  Capture This                    0x000bde2e main (main.m:16)
43  Capture This                    0x000bdde4 0xbb000 + 11748

Thread 1 name:  Dispatch queue: com.apple.root.default-priority
Thread 1:
0   libsystem_kernel.dylib          0x33fc408c __psynch_cvwait + 24
1   libsystem_c.dylib               0x35440d2a _pthread_cond_wait + 642
2   libsystem_c.dylib               0x3544af14 pthread_cond_wait + 36
3   Foundation                      0x3592aa4c -[__NSOperationInternal waitUntilFinished] + 144
4   Capture This                    0x00121fe0 -[PFNetworkCommandRunner runInOperation:callback:] (PFNetworkCommandRunner.m:84)
5   Capture This                    0x001227ee -[PFRetryingCommandRunner runInOperation:callback:] (PFRetryingCommandRunner.m:52)
6   Capture This                    0x0012358a -[PFOperation runInThisThread:] (PFOperation.m:32)
7   Capture This                    0x000db486 -[PFObject(Private) fetchWithLocking:error:] (PFObject.m:942)
8   Capture This                    0x000ebd1e -[PFUser fetchWithLocking:error:] (PFUser.m:1001)
9   Capture This                    0x000dedf4 __39-[PFObject fetchInBackgroundWithBlock:]_block_invoke_0 (PFObject.m:1500)
10  Capture This                    0x00111686 __25-[PFBackgroundTask start]_block_invoke_0 (PFBackgroundTask.m:59)
11  libdispatch.dylib               0x34a6e11c _dispatch_call_block_and_release + 8
12  libdispatch.dylib               0x34a7c254 _dispatch_root_queue_drain + 256
13  libdispatch.dylib               0x34a7c3b4 _dispatch_worker_thread2 + 80
14  libsystem_c.dylib               0x3543da0e _pthread_wqthread + 358
15  libsystem_c.dylib               0x3543d8a0 start_wqthread + 4

Thread 2 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 2:
0   libsystem_kernel.dylib          0x33fb4648 kevent64 + 24
1   libdispatch.dylib               0x34a7d4ec _dispatch_mgr_invoke + 792
2   libdispatch.dylib               0x34a6fdf4 _dispatch_mgr_thread$VARIANT$up + 32

Thread 3 name:  Dispatch queue: com.apple.root.default-priority
Thread 3:
0   libsystem_kernel.dylib          0x33fb3f04 semaphore_wait_trap + 8
1   libdispatch.dylib               0x34a7c82a _dispatch_semaphore_wait_slow + 178
2   libxpc.dylib                    0x34eab5d2 xpc_connection_send_message_with_reply_sync + 150
3   SystemConfiguration             0x390895fe _reach_server_target_status + 334
4   SystemConfiguration             0x3908a2ca __SCNetworkReachabilityServer_targetStatus + 38
5   SystemConfiguration             0x3906a626 __SCNetworkReachabilityGetFlags + 318
6   SystemConfiguration             0x3906afec SCNetworkReachabilityGetFlags + 212
7   Capture This                    0x001049c0 -[PFCommandCache init] (PFCommandCache.m:87)
8   Capture This                    0x00104638 +[PFCommandCache defaultInstance] (PFCommandCache.m:34)
9   Capture This                    0x000f3f24 __36+[Parse setApplicationId:clientKey:]_block_invoke_0 (Parse.m:40)
10  libdispatch.dylib               0x34a6e11c _dispatch_call_block_and_release + 8
11  libdispatch.dylib               0x34a7c254 _dispatch_root_queue_drain + 256
12  libdispatch.dylib               0x34a7c3b4 _dispatch_worker_thread2 + 80
13  libsystem_c.dylib               0x3543da0e _pthread_wqthread + 358
14  libsystem_c.dylib               0x3543d8a0 start_wqthread + 4

Thread 4 name:  WebThread
Thread 4:
0   libsystem_kernel.dylib          0x33fb3eb4 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x33fb4048 mach_msg + 36
2   CoreFoundation                  0x35e34040 __CFRunLoopServiceMachPort + 124
3   CoreFoundation                  0x35e32d9e __CFRunLoopRun + 878
4   CoreFoundation                  0x35da5eb8 CFRunLoopRunSpecific + 352
5   CoreFoundation                  0x35da5d44 CFRunLoopRunInMode + 100
6   WebCore                         0x31a8aa40 _ZL12RunWebThreadPv + 440
7   libsystem_c.dylib               0x3544830e _pthread_start + 306
8   libsystem_c.dylib               0x354481d4 thread_start + 4

Thread 5:
0   libsystem_kernel.dylib          0x33fb3eb4 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x33fb4048 mach_msg + 36
2   CoreFoundation                  0x35e34040 __CFRunLoopServiceMachPort + 124
3   CoreFoundation                  0x35e32d9e __CFRunLoopRun + 878
4   CoreFoundation                  0x35da5eb8 CFRunLoopRunSpecific + 352
5   CoreFoundation                  0x35da5d44 CFRunLoopRunInMode + 100
6   Foundation                      0x358df78a -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 250
7   Foundation                      0x35983058 -[NSRunLoop(NSRunLoop) run] + 76
8   Capture This                    0x0011556a +[PFNetworkingUtils networkThreadMain] (PFNetworkingUtils.m:32)
9   Foundation                      0x3598c678 __NSThread__main__ + 968
10  libsystem_c.dylib               0x3544830e _pthread_start + 306
11  libsystem_c.dylib               0x354481d4 thread_start + 4

Thread 6:
0   libsystem_kernel.dylib          0x33fb3eb4 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x33fb4048 mach_msg + 36
2   CoreFoundation                  0x35e34040 __CFRunLoopServiceMachPort + 124
3   CoreFoundation                  0x35e32d9e __CFRunLoopRun + 878
4   CoreFoundation                  0x35da5eb8 CFRunLoopRunSpecific + 352
5   CoreFoundation                  0x35da5d44 CFRunLoopRunInMode + 100
6   Foundation                      0x358df78a -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 250
7   Foundation                      0x35983058 -[NSRunLoop(NSRunLoop) run] + 76
8   Capture This                    0x00128ec0 +[PF_AFURLConnectionOperation networkRequestThreadEntryPoint:] (PF_AFURLConnectionOperation.m:151)
9   Foundation                      0x3598c678 __NSThread__main__ + 968
10  libsystem_c.dylib               0x3544830e _pthread_start + 306
11  libsystem_c.dylib               0x354481d4 thread_start + 4

Thread 7 name:  com.apple.NSURLConnectionLoader
Thread 7:
0   libsystem_kernel.dylib          0x33fb3eb4 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x33fb4048 mach_msg + 36
2   CoreFoundation                  0x35e34040 __CFRunLoopServiceMachPort + 124
3   CoreFoundation                  0x35e32d9e __CFRunLoopRun + 878
4   CoreFoundation                  0x35da5eb8 CFRunLoopRunSpecific + 352
5   CoreFoundation                  0x35da5d44 CFRunLoopRunInMode + 100
6   Foundation                      0x35908bc8 +[NSURLConnection(Loader) _resourceLoadLoop:] + 304
7   Foundation                      0x3598c678 __NSThread__main__ + 968
8   libsystem_c.dylib               0x3544830e _pthread_start + 306
9   libsystem_c.dylib               0x354481d4 thread_start + 4

Thread 8:
0   libsystem_kernel.dylib          0x33fc4d98 __workq_kernreturn + 8
1   libsystem_c.dylib               0x3543dcf6 _pthread_workq_return + 14
2   libsystem_c.dylib               0x3543da12 _pthread_wqthread + 362
3   libsystem_c.dylib               0x3543d8a0 start_wqthread + 4

Unknown thread crashed with unknown flavor: 5, state_count: 1
4

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