IOS XMPP how to go next controller with particular username and chat - ios

Question

I am working on XMPP project. i have successfully completed login process and online ofline rosters. but now i dont know how to go to next view controller with particular user's field and chat with him. here is my try.
Now what i have to write in UITableview's Delegate Method
friendsviewcontroller.m file // Fetch online and offline rosterlist
#pragma mark -Tableview datasource method
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [[[self fetchedResultsController] sections] count];
}
- (CGFloat)tableView:(UITableView *)aTableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
switch (indexPath.row){
case 0:
if(indexPath.section==0)
return 60.0; // first row is 123pt high
default:
return 60.0; // all other rows are 40pt high
}
}
- (NSString *)tableView:(UITableView *)sender titleForHeaderInSection:(NSInteger)sectionIndex
{
NSArray *sections = [[self fetchedResultsController] sections];
if (sectionIndex < [sections count])
{
id <NSFetchedResultsSectionInfo> sectionInfo = [sections objectAtIndex:sectionIndex];
int section = [sectionInfo.name intValue];
switch (section)
{
case 0 : return #"Available";
case 1 : return #"Away";
default : return #"Offline";
}
}
return #"";}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)sectionIndex{
NSArray *sections = [[self fetchedResultsController] sections];
if (sectionIndex < [sections count])
{
id <NSFetchedResultsSectionInfo> sectionInfo = sections[sectionIndex];
return sectionInfo.numberOfObjects;
}
return 0;}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"SimpleTableItem";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if( cell == nil){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleTableIdentifier];
}
XMPPUserCoreDataStorageObject *user = [[self fetchedResultsController] objectAtIndexPath:indexPath];
cell.textLabel.text = user.displayName;
[self configurePhotoForCell:cell user:user];
// cell.detailTextLabel.text= [self.tblchathistory objectAtIndex:indexPath.row];
cell.textLabel.textColor=[UIColor whiteColor];
return cell;
}
#pragma Mark - segue method
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"chathistory"])
{
CreateGroupViewController *vc = [segue destinationViewController];
}
}
- (BOOL)xmppStream:(XMPPStream *)sender didReceiveIQ:(XMPPIQ *)iq
{
NSXMLElement *queryElement = [iq elementForName: #"query" xmlns: #"jabber:iq:roster"];
if (queryElement)
{
NSArray *itemElements = [queryElement elementsForName: #"item"];
for (int i=0; i<[itemElements count]; i++)
{
NSLog(#"Friend: %#",[[itemElements[i] attributeForName:#"jid"]stringValue]);
}
}
return NO;
}
- (NSFetchedResultsController *)fetchedResultsController
{
if (fetchedResultsController == nil)
{
NSManagedObjectContext *moc = [[self appDelegate] managedObjectContext_roster];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"XMPPUserCoreDataStorageObject"
inManagedObjectContext:moc];
NSSortDescriptor *sd1 = [[NSSortDescriptor alloc] initWithKey:#"sectionNum" ascending:YES];
NSSortDescriptor *sd2 = [[NSSortDescriptor alloc] initWithKey:#"displayName" ascending:YES];
NSArray *sortDescriptors = [NSArray arrayWithObjects:sd1, sd2, nil];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
[fetchRequest setEntity:entity];
[fetchRequest setSortDescriptors:sortDescriptors];
[fetchRequest setFetchBatchSize:10];
fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest
managedObjectContext:moc
sectionNameKeyPath:#"sectionNum"
cacheName:nil];
[fetchedResultsController setDelegate:self];
NSError *error = nil;
if (![fetchedResultsController performFetch:&error])
{
DDLogError(#"Error performing fetch:= %#", error);
//NSLog(#"error = %#", error);
}
}
return fetchedResultsController;
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[[self tblvwbuddy] reloadData];
}

Answer 1

You can fetch the user by following way
While you are showing in one screen that means you have the jid of the user, so take that user's jid and in next controller you can filter the user.
Here is my code to filter the porticular user from XMPPUserCoreDataStorageObject by means of jid. In my case friendJid is the jid to be filtered
- (XMPPUserCoreDataStorageObject *)fetchTheUser
{
NSManagedObjectContext *moc = [APP_DELEGATE managedObjectContext_roster];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"XMPPUserCoreDataStorageObject"
inManagedObjectContext:moc];
NSPredicate *pred = [NSPredicate predicateWithFormat:#"jidStr=%#",[self.friendJid lowercaseString]];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
[fetchRequest setEntity:entity];
[fetchRequest setPredicate:pred];
NSError *error = nil;
[fetchRequest setPredicate:pred];
NSArray *fetchedObjects = [[APP_DELEGATE managedObjectContext_roster] executeFetchRequest:fetchRequest error:&error];
XMPPUserCoreDataStorageObject *objTemp = fetchedObjects.count?[fetchedObjects objectAtIndex:0]:nil;
return objTemp;
}
Hope it will help you.
accept the answer if you find this useful