CoreData: crashes when [MQTTCoreDataPersistence createManagedObjectModel]

[bob2077]

I get the following crash stack：

41 not_main

SIGSEGV

SEGV_ACCERR

解析原始 0 Foundation -[NSProcessInfo environment] + 132 9 CoreData -[NSManagedObjectModel init] + 28 10 x -[MQTTCoreDataPersistence createManagedObjectModel] + 72 11 x -[MQTTCoreDataPersistence createPersistentStoreCoordinator] + 144 12 x -[MQTTCoreDataPersistence managedObjectContext] + 60 13 x -[MQTTCoreDataPersistence allFlowsforClientId:incomingFlag:] + 164 14 x -[MQTTSession tell] + 120 15 x -[MQTTSession connect] + 2176 16 x -[MQTTSessionManager connectToInternal:] + 744 17 x -[MQTTSessionManager connectTo:port:tls:keepalive:clean:auth:user:pass:will:willTopic:willMsg:willQos:willRetainFlag:withClientId:securityPolicy:certificates:protocolLevel:connectHandler:] + 2000 18 x _41-[TPNSMQTTSessionManager connectToTPNS]_block_invoke_2 + 964 19 libdispatch.dylib dispatch_client_callout + 16 20 libdispatch.dylib dispatch_lane_barrier_sync_invoke_and_complete + 52 21 x ___41-[TPNSMQTTSessionManager connectToTPNS]_blockinvoke + 80 22 x -[TPNSOperation completed] + 136 23 x -[TPNSOperation main] + 40 24 Foundation NSThreadPerformPerform + 164 31 Foundation -[NSRunLoop(NSRunLoop) run] + 88 32 x +[TPNSQueueManager threadEntryPoint:] + 216 33 Foundation _NSThreadstart + 792 34 libsystem_pthread.dylib pthread_start + 116

[bob2077]

• (NSManagedObjectModel )createManagedObjectModel { NSManagedObjectModel managedObjectModel = [[NSManagedObjectModel alloc] init]; NSMutableArray entities = [[NSMutableArray alloc] init]; NSMutableArray properties = [[NSMutableArray alloc] init];

  NSAttributeDescription *attributeDescription;

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"clientId"; attributeDescription.attributeType = NSStringAttributeType; attributeDescription.attributeValueClassName = @"NSString"; [properties addObject:attributeDescription];

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"incomingFlag"; attributeDescription.attributeType = NSBooleanAttributeType; attributeDescription.attributeValueClassName = @"NSNumber"; [properties addObject:attributeDescription];

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"retainedFlag"; attributeDescription.attributeType = NSBooleanAttributeType; attributeDescription.attributeValueClassName = @"NSNumber"; [properties addObject:attributeDescription];

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"commandType"; attributeDescription.attributeType = NSInteger16AttributeType; attributeDescription.attributeValueClassName = @"NSNumber"; [properties addObject:attributeDescription];

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"qosLevel"; attributeDescription.attributeType = NSInteger16AttributeType; attributeDescription.attributeValueClassName = @"NSNumber"; [properties addObject:attributeDescription];

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"messageId"; attributeDescription.attributeType = NSInteger32AttributeType; attributeDescription.attributeValueClassName = @"NSNumber"; [properties addObject:attributeDescription];

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"topic"; attributeDescription.attributeType = NSStringAttributeType; attributeDescription.attributeValueClassName = @"NSString"; [properties addObject:attributeDescription];

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"data"; attributeDescription.attributeType = NSBinaryDataAttributeType; attributeDescription.attributeValueClassName = @"NSData"; [properties addObject:attributeDescription];

  attributeDescription = [[NSAttributeDescription alloc] init]; attributeDescription.name = @"deadline"; attributeDescription.attributeType = NSDateAttributeType; attributeDescription.attributeValueClassName = @"NSDate"; [properties addObject:attributeDescription];

  NSEntityDescription *entityDescription = [[NSEntityDescription alloc] init]; entityDescription.name = @"XGMQTTFlow"; entityDescription.managedObjectClassName = @"XGMQTTFlow"; entityDescription.abstract = FALSE; entityDescription.properties = properties;

  [entities addObject:entityDescription]; managedObjectModel.entities = entities;

  return managedObjectModel; }