self.context=[[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType]; [self.context setPersistentStoreCoordinator:dm.PSC]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(mocDidSaveNotification:) name:NSManagedObjectContextDidSaveNotification object:nil]; [self.context setMergePolicy:NSMergeByPropertyObjectTrumpMergePolicy];//重要!!!
时间: 2024-08-09 10:37:00