在核心数据中保存和加载xmpp消息

Question

I am making chat app and I want to save to core data user profile(images, name, age, detail info) and this talks with other users. In need save all new messages, I need that I can see that messages was read, also if user will want to see his history I will load it from web serves (like scrolling to top of VC).

I use that code to save and load messages, but how can I use my results array for construction chat history for 2 exact users?

//this code in XMPPStream
 xmppStream = [[XMPPStream alloc]init];
[xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
 xmppStream.autoStartTLS = YES;

 xmppReconnect = [[XMPPReconnect alloc]init];
[xmppReconnect activate:self.xmppStream];

 xmppMessageArchivingCoreDataStorage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
 xmppMessageArchivingModule = [[XMPPMessageArchiving alloc]initWithMessageArchivingStorage:xmppMessageArchivingCoreDataStorage];
[xmppMessageArchivingModule setClientSideMessageArchivingOnly:YES];
[xmppMessageArchivingModule activate:xmppStream];    //By this line all your messages are stored in CoreData
[xmppMessageArchivingModule addDelegate:self delegateQueue:dispatch_get_main_queue()];

To retrieve the saved message in talks VC

NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];

 NSManagedObjectContext *context = [self.xmppMessageArchivingCoreDataStorage mainThreadManagedObjectContext];
 NSEntityDescription *messageEntity = [NSEntityDescription entityForName:@"XMPPMessageArchiving_Message_CoreDataObject" inManagedObjectContext:context];

 fetchRequest.entity = messageEntity;

 NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"timestamp" ascending:NO];
 fetchRequest.sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
 NSError *error = nil;
 NSArray *results = [context executeFetchRequest:fetchRequest error:&error];
//Now I get the NSArray with element type of "XMPPMessageArchiving_Message_CoreDataObject"

Answer 1

if someone still needs an answer:

just add this predicate to your request.

fetchRequest.predicate = [NSPredicate predicateWithFormat:@"bareJidStr = %@", user.jid];