I gather that when using NSPrivateQueueConcurrencyType, all operations (a fetch for example) have to be done within a performBlock call.
Apple has sample code here: https://developer.apple.com/library/mac/samplecode/Earthquakes/History/Histo ry.html#//apple_ref/doc/uid/TP40014547-RevisionHistory-DontLinkElementID_1 That gets a private queue with: NSManagedObjectContext *privateQueueContext(NSError *__autoreleasing *error) { NSPersistentStoreCoordinator *localCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[AAPLCoreDataStackManager sharedManager].managedObjectModel]; if (![localCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:[AAPLCoreDataStackManager sharedManager].storeURL options:nil error:error]) return nil; NSManagedObjectContext *context = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType]; [context setPersistentStoreCoordinator:localCoordinator]; context.undoManager = nil; return context; } Then later, this context is used outside a performBlock: NSArray *matchingQuakes = [taskContext executeFetchRequest:matchingQuakeRequest error:&anyError]; Why does this work? Trygve _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
