semaphore_wait_trap阻止用户界面

我的应用程序用户界面由于semaphore_wait_trap 。 我不知道如何跟踪它。 我已经检查，如果我从后台线程更新任何用户界面。 但没有find任何。 这是堆栈跟踪。

任何帮助将不胜感激。

这是线程回溯结果：

  warning: could not load any Objective-C class information. This will significantly reduce the quality of type information available. * thread #1: tid = 0x57d93, 0x3814800c libsystem_kernel.dylib`semaphore_wait_trap + 8, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP * frame #0: 0x3814800c libsystem_kernel.dylib`semaphore_wait_trap + 8 frame #1: 0x381f5288 libsystem_platform.dylib`_os_semaphore_wait + 12 frame #2: 0x008f0178 libdispatch.dylib`_dispatch_barrier_sync_f_slow + 412 frame #3: 0x0045318a IssMan - Construction punchlist, on-site inspection and snagging`NR__dispatch_sync(queue=0x1667fc50, block=<unavailable>) + 126 at NRGCDOverride.m:89 [opt] frame #4: 0x00366116 IssMan - Construction punchlist, on-site inspection and snagging`-[FMDatabaseQueue inDatabase:](self=0x166459f0, _cmd="inDatabase:", block=(IssMan - Construction punchlist, on-site inspection and snagging`__29+[UserDAO getLanguageOfUser:]_block_invoke + 1 at UserDAO.m:445)) + 230 at FMDatabaseQueue.m:151 frame #5: 0x0038105e IssMan - Construction punchlist, on-site inspection and snagging`+[UserDAO getLanguageOfUser:](self=0x0057d34c, _cmd="getLanguageOfUser:", user=0x16703460) + 298 at UserDAO.m:445 frame #6: 0x0010288a IssMan - Construction punchlist, on-site inspection and snagging`-[MenuViewController setLanguage](self=0x1717ba00, _cmd="setLanguage") + 226 at MenuViewController.m:316 frame #7: 0x001038e4 IssMan - Construction punchlist, on-site inspection and snagging`-[MenuViewController viewWillAppear:](self=0x1717ba00, _cmd="viewWillAppear:", animated=YES) + 420 at MenuViewController.m:420 frame #8: 0x0044ecfa IssMan - Construction punchlist, on-site inspection and snagging`NRMA__boolParamHandler(self=0x1717ba00, selector="viewWillAppear:", targetColor=<unavailable>, p1=<unavailable>) + 42 at NRMAMethodProfiler.m:770 [opt] frame #9: 0x2a3ca018 UIKit`-[UIViewController _setViewAppearState:isAnimating:] + 572 frame #10: 0x2a3c9dba UIKit`-[UIViewController __viewWillAppear:] + 146 frame #11: 0x2a55f340 UIKit`-[UINavigationController _startCustomTransition:] + 1052 frame #12: 0x2a46da6e UIKit`-[UINavigationController _startDeferredTransitionIfNeeded:] + 650 frame #13: 0x2a46d77c UIKit`-[UINavigationController __viewWillLayoutSubviews] + 52 frame #14: 0x2a46d6f6 UIKit`-[UILayoutContainerView layoutSubviews] + 214 frame #15: 0x2a3adcc2 UIKit`-[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 694 frame #16: 0x29c75b04 QuartzCore`-[CALayer layoutSublayers] + 128 frame #17: 0x29c71200 QuartzCore`CA::Layer::layout_if_needed(CA::Transaction*) + 352 frame #18: 0x29c71090 QuartzCore`CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 16 frame #19: 0x29c705b0 QuartzCore`CA::Context::commit_transaction(CA::Transaction*) + 368 frame #20: 0x29c70262 QuartzCore`CA::Transaction::commit() + 614 frame #21: 0x29c69a1e QuartzCore`CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 138 frame #22: 0x26240090 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 20 frame #23: 0x2623e386 CoreFoundation`__CFRunLoopDoObservers + 282 frame #24: 0x2623e7c4 CoreFoundation`__CFRunLoopRun + 972 frame #25: 0x261910d8 CoreFoundation`CFRunLoopRunSpecific + 516 frame #26: 0x26190ecc CoreFoundation`CFRunLoopRunInMode + 108 frame #27: 0x2f506af8 GraphicsServices`GSEventRunModal + 160 frame #28: 0x2a41a2dc UIKit`UIApplicationMain + 144 frame #29: 0x000d0872 IssMan - Construction punchlist, on-site inspection and snagging`main(argc=1, argv=0x008c5a78) + 102 at main.m:17 thread #4: tid = 0x57db4, 0x3815d320 libsystem_kernel.dylib`kevent_qos + 24, queue = 'com.apple.libdispatch-manager' frame #0: 0x3815d320 libsystem_kernel.dylib`kevent_qos + 24 frame #1: 0x008f75f6 libdispatch.dylib`_dispatch_mgr_invoke + 254 frame #2: 0x008e89ce libdispatch.dylib`_dispatch_mgr_thread + 38 thread #5: tid = 0x57db7, 0x3814800c libsystem_kernel.dylib`semaphore_wait_trap + 8, queue = 'harvesterQueue' frame #0: 0x3814800c libsystem_kernel.dylib`semaphore_wait_trap + 8 frame #1: 0x008f54ba libdispatch.dylib`_dispatch_semaphore_wait_slow + 190 frame #2: 0x25ae3cdc CFNetwork`CFURLConnectionSendSynchronousRequest + 272 frame #3: 0x25afe2fe CFNetwork`+[NSURLConnection sendSynchronousRequest:returningResponse:error:] + 94 frame #4: 0x004387ba IssMan - Construction punchlist, on-site inspection and snagging`__65+[NRMANSURLConnectionSupport poseImplementationBlockForSelector:]_block_invoke(.block_descriptor=<unavailable>, _self=<unavailable>, request=0x1657a3f0, response=0x401969dc, error=<unavailable>) + 146 at NRMANSURLConnectionSupport.m:204 [opt] frame #5: 0x00442faa IssMan - Construction punchlist, on-site inspection and snagging`-[NRMAHarvesterConnection send:](self=<unavailable>, _cmd=<unavailable>, post=<unavailable>) + 130 at NRMAHarvesterConnection.m:97 [opt] frame #6: 0x00443808 IssMan - Construction punchlist, on-site inspection and snagging`-[NRMAHarvesterConnection sendData:](self=0x165574c0, _cmd=<unavailable>, harvestable=<unavailable>) + 416 at NRMAHarvesterConnection.m:160 [opt] frame #7: 0x0043c784 IssMan - Construction punchlist, on-site inspection and snagging`-[NRMAHarvester connected](self=<unavailable>, _cmd=<unavailable>) + 724 at NRMAHarvester.m:268 [opt] frame #8: 0x0043e23a IssMan - Construction punchlist, on-site inspection and snagging`-[NRMAHarvester execute](self=<unavailable>, _cmd=<unavailable>) + 522 at NRMAHarvester.m:505 [opt] frame #9: 0x0043cf4c IssMan - Construction punchlist, on-site inspection and snagging`-[NRMAHarvester disconnected](self=<unavailable>, _cmd=<unavailable>) + 276 at NRMAHarvester.m:350 [opt] frame #10: 0x0043e1f6 IssMan - Construction punchlist, on-site inspection and snagging`-[NRMAHarvester execute](self=<unavailable>, _cmd=<unavailable>) + 454 at NRMAHarvester.m:500 [opt] frame #11: 0x004471f4 IssMan - Construction punchlist, on-site inspection and snagging`__30+[NRMAHarvestController start]_block_invoke_2(.block_descriptor=<unavailable>) + 412 at NRMAHarvestController.m:143 [opt] frame #12: 0x008e6d16 libdispatch.dylib`_dispatch_call_block_and_release + 10 frame #13: 0x008f161a libdispatch.dylib`_dispatch_queue_drain + 2014 frame #14: 0x008e9f52 libdispatch.dylib`_dispatch_queue_invoke + 282 frame #15: 0x008f306e libdispatch.dylib`_dispatch_root_queue_drain + 1802 frame #16: 0x008f2960 libdispatch.dylib`_dispatch_worker_thread3 + 100 frame #17: 0x381f8e0c libsystem_pthread.dylib`_pthread_wqthread + 1024 frame #18: 0x381f89fc libsystem_pthread.dylib`start_wqthread + 8 thread #6: tid = 0x57dba, 0x3815bf14 libsystem_kernel.dylib`__select + 20, name = 'com.apple.CFSocket.private' frame #0: 0x3815bf14 libsystem_kernel.dylib`__select + 20 frame #1: 0x26245930 CoreFoundation`__CFSocketManager + 572 frame #2: 0x381fac7e libsystem_pthread.dylib`_pthread_body + 138 frame #3: 0x381fabf2 libsystem_pthread.dylib`_pthread_start + 110 frame #4: 0x381f8a08 libsystem_pthread.dylib`thread_start + 8 thread #7: tid = 0x57dc4, 0x38147fbc libsystem_kernel.dylib`mach_msg_trap + 20, name = 'com.apple.NSURLConnectionLoader' frame #0: 0x38147fbc libsystem_kernel.dylib`mach_msg_trap + 20 frame #1: 0x38147dbc libsystem_kernel.dylib`mach_msg + 40 frame #2: 0x2624048c CoreFoundation`__CFRunLoopServiceMachPort + 136 frame #3: 0x2623e812 CoreFoundation`__CFRunLoopRun + 1050 frame #4: 0x261910d8 CoreFoundation`CFRunLoopRunSpecific + 516 frame #5: 0x26190ecc CoreFoundation`CFRunLoopRunInMode + 108 frame #6: 0x25afdd9e CFNetwork`+[NSURLConnection(Loader) _resourceLoadLoop:] + 486 frame #7: 0x2705436c Foundation`__NSThread__start__ + 1144 frame #8: 0x381fac7e libsystem_pthread.dylib`_pthread_body + 138 frame #9: 0x381fabf2 libsystem_pthread.dylib`_pthread_start + 110 frame #10: 0x381f8a08 libsystem_pthread.dylib`thread_start + 8 thread #8: tid = 0x57dc8, 0x3815c88c libsystem_kernel.dylib`__workq_kernreturn + 8 frame #0: 0x3815c88c libsystem_kernel.dylib`__workq_kernreturn + 8 frame #1: 0x381f8e18 libsystem_pthread.dylib`_pthread_wqthread + 1036 frame #2: 0x381f89fc libsystem_pthread.dylib`start_wqthread + 8 thread #10: tid = 0x57dca, 0x3815c024 libsystem_kernel.dylib`__semwait_signal + 24, queue = 'NSOperationQueue 0x165eafe0 :: NSOperation 0x16782190 (QOS: USER_INTERACTIVE)' frame #0: 0x3815c024 libsystem_kernel.dylib`__semwait_signal + 24 frame #1: 0x380b391c libsystem_c.dylib`nanosleep + 172 frame #2: 0x27053856 Foundation`+[NSThread sleepForTimeInterval:] + 142 frame #3: 0x002e1d24 IssMan - Construction punchlist, on-site inspection and snagging`-[MetaDataSyncOperation main](self=0x16782190, _cmd="main") + 368 at MetaDataSyncOperation.m:48 frame #4: 0x26f903ce Foundation`-[__NSOperationInternal _start:] + 774 frame #5: 0x2703e82c Foundation`__NSOQSchedule_f + 192 frame #6: 0x008f161a libdispatch.dylib`_dispatch_queue_drain + 2014 frame #7: 0x008e9f52 libdispatch.dylib`_dispatch_queue_invoke + 282 frame #8: 0x008f2b0e libdispatch.dylib`_dispatch_root_queue_drain + 426 frame #9: 0x008f2960 libdispatch.dylib`_dispatch_worker_thread3 + 100 frame #10: 0x381f8e0c libsystem_pthread.dylib`_pthread_wqthread + 1024 frame #11: 0x381f89fc libsystem_pthread.dylib`start_wqthread + 8 thread #11: tid = 0x57dcd, 0x38147fbc libsystem_kernel.dylib`mach_msg_trap + 20, name = 'AFNetworking' frame #0: 0x38147fbc libsystem_kernel.dylib`mach_msg_trap + 20 frame #1: 0x38147dbc libsystem_kernel.dylib`mach_msg + 40 frame #2: 0x2624048c CoreFoundation`__CFRunLoopServiceMachPort + 136 frame #3: 0x2623e812 CoreFoundation`__CFRunLoopRun + 1050 frame #4: 0x261910d8 CoreFoundation`CFRunLoopRunSpecific + 516 frame #5: 0x26190ecc CoreFoundation`CFRunLoopRunInMode + 108 frame #6: 0x26f8388c Foundation`-[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 268 frame #7: 0x26fd241c Foundation`-[NSRunLoop(NSRunLoop) run] + 80 frame #8: 0x003e306e IssMan - Construction punchlist, on-site inspection and snagging`+[AFURLConnectionOperation networkRequestThreadEntryPoint:](self=0x0057d914, _cmd="networkRequestThreadEntryPoint:", object=0x00000000) + 354 at AFURLConnectionOperation.m:163 frame #9: 0x2705436c Foundation`__NSThread__start__ + 1144 frame #10: 0x381fac7e libsystem_pthread.dylib`_pthread_body + 138 frame #11: 0x381fabf2 libsystem_pthread.dylib`_pthread_start + 110 frame #12: 0x381f8a08 libsystem_pthread.dylib`thread_start + 8 thread #12: tid = 0x57dce, 0x38148dc0 libsystem_kernel.dylib`pread + 20, queue = 'fmdb.<FMDatabaseQueue: 0x166459f0>' frame #0: 0x38148dc0 libsystem_kernel.dylib`pread + 20 frame #1: 0x37e41252 libsqlite3.dylib`___lldb_unnamed_function356$$libsqlite3.dylib + 206 frame #2: 0x37ddded0 libsqlite3.dylib`___lldb_unnamed_function25$$libsqlite3.dylib + 24 frame #3: 0x37df6824 libsqlite3.dylib`___lldb_unnamed_function77$$libsqlite3.dylib + 120 frame #4: 0x37df5bb6 libsqlite3.dylib`___lldb_unnamed_function72$$libsqlite3.dylib + 718 frame #5: 0x37e47f7a libsqlite3.dylib`___lldb_unnamed_function431$$libsqlite3.dylib + 250 frame #6: 0x37e2ef5a libsqlite3.dylib`___lldb_unnamed_function250$$libsqlite3.dylib + 718 frame #7: 0x37e3bffe libsqlite3.dylib`___lldb_unnamed_function316$$libsqlite3.dylib + 234 frame #8: 0x37e186b6 libsqlite3.dylib`___lldb_unnamed_function159$$libsqlite3.dylib + 158 frame #9: 0x37e0c4b0 libsqlite3.dylib`___lldb_unnamed_function114$$libsqlite3.dylib + 24192 frame #10: 0x37e05b48 libsqlite3.dylib`sqlite3_step + 472 frame #11: 0x00280fe0 IssMan - Construction punchlist, on-site inspection and snagging`-[FMResultSet nextWithError:](self=0x17a2d5b0, _cmd="nextWithError:", outErr=0x00000000) + 64 at FMResultSet.m:155 frame #12: 0x00280f9a IssMan - Construction punchlist, on-site inspection and snagging`-[FMResultSet next](self=0x17a2d5b0, _cmd="next") + 42 at FMResultSet.m:150 frame #13: 0x001001da IssMan - Construction punchlist, on-site inspection and snagging`__45-[SyncStatusCalculatorOperation updateStatus]_block_invoke101(.block_descriptor=0x40524bcc, db=0x1667e750) + 198 at SyncStatusCalculatorOperation.m:152 frame #14: 0x00366194 IssMan - Construction punchlist, on-site inspection and snagging`__30-[FMDatabaseQueue inDatabase:]_block_invoke(.block_descriptor=0x40524a54) + 88 at FMDatabaseQueue.m:151 frame #15: 0x004531c6 IssMan - Construction punchlist, on-site inspection and snagging`__NR__dispatch_sync_block_invoke(.block_descriptor=<unavailable>) + 30 at NRGCDOverride.m:91 [opt] frame #16: 0x008e6d02 libdispatch.dylib`_dispatch_client_callout + 22 frame #17: 0x008f04fa libdispatch.dylib`_dispatch_barrier_sync_f_invoke + 102 frame #18: 0x0045318a IssMan - Construction punchlist, on-site inspection and snagging`NR__dispatch_sync(queue=0x1667fc50, block=<unavailable>) + 126 at NRGCDOverride.m:89 [opt] frame #19: 0x00366116 IssMan - Construction punchlist, on-site inspection and snagging`-[FMDatabaseQueue inDatabase:](self=0x166459f0, _cmd="inDatabase:", block=(IssMan - Construction punchlist, on-site inspection and snagging`__45-[SyncStatusCalculatorOperation updateStatus]_block_invoke101 + 1 at SyncStatusCalculatorOperation.m:140)) + 230 at FMDatabaseQueue.m:151 frame #20: 0x000ff3e4 IssMan - Construction punchlist, on-site inspection and snagging`-[SyncStatusCalculatorOperation updateStatus](self=0x178ed200, _cmd="updateStatus") + 1884 at SyncStatusCalculatorOperation.m:140 frame #21: 0x000fec7a IssMan - Construction punchlist, on-site inspection and snagging`-[SyncStatusCalculatorOperation main](self=0x178ed200, _cmd="main") + 290 at SyncStatusCalculatorOperation.m:35 frame #22: 0x26f903ce Foundation`-[__NSOperationInternal _start:] + 774 frame #23: 0x2703e82c Foundation`__NSOQSchedule_f + 192 frame #24: 0x008f161a libdispatch.dylib`_dispatch_queue_drain + 2014 frame #25: 0x008e9f52 libdispatch.dylib`_dispatch_queue_invoke + 282 frame #26: 0x008f2b0e libdispatch.dylib`_dispatch_root_queue_drain + 426 frame #27: 0x008f2960 libdispatch.dylib`_dispatch_worker_thread3 + 100 frame #28: 0x381f8e0c libsystem_pthread.dylib`_pthread_wqthread + 1024 frame #29: 0x381f89fc libsystem_pthread.dylib`start_wqthread + 8 thread #13: tid = 0x57dd1, 0x38147fbc libsystem_kernel.dylib`mach_msg_trap + 20, name = 'WebThread' frame #0: 0x38147fbc libsystem_kernel.dylib`mach_msg_trap + 20 frame #1: 0x38147dbc libsystem_kernel.dylib`mach_msg + 40 frame #2: 0x2624048c CoreFoundation`__CFRunLoopServiceMachPort + 136 frame #3: 0x2623e812 CoreFoundation`__CFRunLoopRun + 1050 frame #4: 0x261910d8 CoreFoundation`CFRunLoopRunSpecific + 516 frame #5: 0x26190ecc CoreFoundation`CFRunLoopRunInMode + 108 frame #6: 0x351868d6 WebCore`RunWebThread(void*) + 422 frame #7: 0x381fac7e libsystem_pthread.dylib`_pthread_body + 138 frame #8: 0x381fabf2 libsystem_pthread.dylib`_pthread_start + 110 frame #9: 0x381f8a08 libsystem_pthread.dylib`thread_start + 8 thread #15: tid = 0x57e0e, 0x3815c88c libsystem_kernel.dylib`__workq_kernreturn + 8 frame #0: 0x3815c88c libsystem_kernel.dylib`__workq_kernreturn + 8 frame #1: 0x381f8e18 libsystem_pthread.dylib`_pthread_wqthread + 1036 frame #2: 0x381f89fc libsystem_pthread.dylib`start_wqthread + 8 

这是updateStatus的来源：

 -(void)updateStatus { if(isCalculating)return; isCalculating = YES; NSMutableArray *tableList = [[NSMutableArray alloc] init]; [[IssMANAppDelegate appDelegate].dbQueue inDatabase:^(FMDatabase *db) { FMResultSet *resultsSet = [db executeQuery:@"SELECT name FROM sqlite_master WHERE type='table' ORDER BY name"]; while ([resultsSet next]){ [tableList addObject:[resultsSet stringForColumn:@"name"]]; } [resultsSet close]; }]; __block int totalRow = 0; __block int pendingRow = 0; // totalPhotoRow = 0; __block int pendingPhotoRow = 0; __block int pendingDataDownload = 0; __block int pendingPhotoDownload = 0; // __block NSInteger pendingPhotoRow = 0; [[IssMANAppDelegate appDelegate].dbQueue inDatabase:^(FMDatabase *db) { FMResultSet *resultSet = nil; resultSet = [db executeQuery:@"SELECT COUNT(*) C FROM media_content, media WHERE media.pk_id = media_content.media_pk_id AND media.status = 'active' AND media_content.is_dirty = 1"]; while([resultSet next]){ pendingPhotoRow = [resultSet intForColumn:@"C"]; } [resultSet close]; }]; // pendingPhotoRow = [MediaDAO getPendingUploadImages]; for(int k=0;k<tableList.count;k++) { NSString* tableName = (NSString*) [tableList objectAtIndex:k]; if([tableName isEqualToString:@"settings"])continue; if([tableName isEqualToString:@"sqlite_sequence"])continue; if([tableName isEqualToString:@"temp_purchased_transactions"])continue; if([tableName isEqualToString:@"latest_project_report_issue"])continue; if([tableName isEqualToString:@"role"])continue; if([tableName isEqualToString:@"event_type"])continue; if([tableName isEqualToString:@"rel_role_event_type_notification_type"])continue; if([tableName isEqualToString:@"rel_user_product"])continue; if([tableName isEqualToString:@"media_content"])continue; [[IssMANAppDelegate appDelegate].dbQueue inDatabase:^(FMDatabase *db) { NSString* sql = NULL; if([ISSManDBManager columnExists:@"status" inTableWithName:tableName andDB:db]) { sql = [NSString stringWithFormat:@"SELECT COUNT(*) C FROM %@ where status <> 'deleted'",tableName]; } else if([ISSManDBManager columnExists:@"sender_status" inTableWithName:tableName andDB:db]) { sql = [NSString stringWithFormat:@"SELECT COUNT(*) C FROM %@ where sender_status <> 'deleted'",tableName]; } else { sql = [NSString stringWithFormat:@"SELECT COUNT(*) C FROM %@",tableName]; } FMResultSet *resultSet = [db executeQuery:sql]; while([resultSet next]) { int rowCount = [resultSet intForColumn:@"C"]; if([tableName isEqualToString:@"media_content"]) { // totalPhotoRow += rowCount; } else { totalRow += rowCount; } } if([ISSManDBManager columnExists:@"status" inTableWithName:tableName andDB:db]) { sql = [NSString stringWithFormat:@"SELECT COUNT(*) C FROM %@ WHERE is_dirty = 1 and status <> 'deleted'",tableName]; } else if([ISSManDBManager columnExists:@"sender_status" inTableWithName:tableName andDB:db]) { sql = [NSString stringWithFormat:@"SELECT COUNT(*) C FROM %@ WHERE is_dirty = 1 and sender_status <> 'deleted'",tableName]; } else { sql = [NSString stringWithFormat:@"SELECT COUNT(*) C FROM %@ WHERE is_dirty = 1",tableName]; } resultSet = [db executeQuery:sql]; while([resultSet next]) { NSInteger rowCount = [resultSet intForColumn:@"C"]; pendingRow += rowCount; } [resultSet close]; }]; } [[IssMANAppDelegate appDelegate].dbQueue inDatabase:^(FMDatabase *db) { NSString* sql = NULL; sql = [NSString stringWithFormat:@"SELECT COUNT(media.pk_id) C \ FROM media, media_content \ WHERE \ media.pk_id = media_content.media_pk_id AND \ media.status = 'active' AND \ media.update_date_time > media_content.last_sync_time"]; FMResultSet *resultingSet = [db executeQuery:sql]; while ([resultingSet next]) { int rowCount = [resultingSet intForColumn:@"C"]; pendingPhotoDownload += rowCount; } [resultingSet close]; NSString *sqlQuery = [NSString stringWithFormat:@"SELECT COUNT(pk_id) C FROM rel_user_product"]; FMResultSet *resultsSets = [db executeQuery:sqlQuery]; while([resultsSets next]) { int rowCount = [resultsSets intForColumn:@"C"]; pendingDataDownload += rowCount; } [resultsSets close]; }]; double ratio = 0.0; if(totalRow)ratio = (double)pendingRow / (double)totalRow * 100.0; ratio = floor(100.0 - ratio); double downloadRation = 0.0; if(pendingDataDownload) downloadRation = 100.0; isCalculating = NO; NSMutableDictionary* syncStatusDic = [[NSMutableDictionary alloc] init]; [syncStatusDic setObject:[NSNumber numberWithInt:totalRow] forKey:TOTAL_ROW]; [syncStatusDic setObject:[NSNumber numberWithInt:pendingRow] forKey:PENDING_ROW]; [syncStatusDic setObject:[NSNumber numberWithInt:pendingPhotoRow] forKey:PENDING_PHOTO]; [syncStatusDic setObject:[NSNumber numberWithInt:pendingDataDownload] forKey:PENDING_DATA_DOWNLOAD]; [syncStatusDic setObject:[NSNumber numberWithInt:pendingPhotoDownload] forKey:PENDING_PHOTO_DOWNLOAD]; [self.delegate updateSyncStatusValues: [NSDictionary dictionaryWithDictionary:syncStatusDic]]; // safe conversion from NSMutableDictionary to NSDictionary } 

Answer 1

您的回溯中的线程＃12正在数据库队列上运行，执行-[SyncStatusCalculatorOperation updateStatus] （帧＃13）。 在该块返回之前，不能在数据库队列上运行其他线程。 您的主线程（线程＃1）将阻塞，直到线程＃12离开数据库队列。

你需要看看-[SyncStatusCalculatorOperation updateStatus]找出为什么这么长时间。