iOSDev1.h

(void)pubnubClient:(PubNub *)client didReceiveMessage:(PNMessage *)message {

    NSMutableDictionary *groupMessages = [[NSMutableDictionary alloc] init];
    [groupMessages setDictionary: [[Globals sharedInstance] groupMess]];
    
    NSMutableDictionary *nameDict = [[NSMutableDictionary alloc] init];
    [nameDict setDictionary: [[Globals sharedInstance] nameDict]];

    NSMutableString *groupName = [[NSMutableString alloc] init];
    
    NSString* text = [[message.message allKeys] objectAtIndex:0];
    NSString* group = [message.message objectForKey: text];
    NSString* member = @"";   // So we know who sent message
    bool isFound = false;
    
    // When checking, we append the name of the group to the name of
    // the group member, and then compare
    // This is done for added security. See (IBAction) sendButton in
    // ViewController for more details
    for(id key in nameDict) {
        id value = [nameDict objectForKey: key];
        for(id name in value) {
            id num = [[[Globals sharedInstance] nameNumber] objectForKey: name];
            if([group isEqual: [key stringByAppendingString: num]]){
                groupName = [NSMutableString stringWithString: key];
                isFound = true;
                member = name; // So we know who sent message

                break;
            }
        }
    }
    if(!isFound)
        return;
    
    NSString *str = [PNJSONSerialization stringFromJSONObject: text];
    str = [str substringWithRange:NSMakeRange(1, [str length] - 2)];
    //str = [str stringByAppendingString: member]; So we know who sent message No need because now  using dict->array->dict
    
    NSMutableArray *arr = [groupMessages valueForKey: groupName];
    NSArray *dateSender = [[NSArray alloc] initWithObjects: [NSDate dateWithTimeIntervalSinceNow:0], member, nil];
    NSMutableDictionary *msgDate = [[NSMutableDictionary alloc] init];
    [msgDate setObject: dateSender forKey: str];
    [arr addObject: msgDate];
    
    [groupMessages removeObjectForKey: groupName];
    [groupMessages setObject: arr forKey: groupName];
    [[Globals sharedInstance] setGroupMess: groupMessages];
    
    // Save variables
    [[Globals sharedInstance] saveVariables];

}

iOSDev2.h

-(IBAction)sendButton:(id)sender {
    
    //Bubble data code
    
    bubbleTable.typingBubble = NSBubbleTypingTypeNobody;
    
    // Send message in dictionary form to all group memebers

    NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
    [dict setDictionary:  [[Globals sharedInstance] nameDict]];
    
    NSArray* names = [dict valueForKey: [[Globals sharedInstance] selectedGroupName]];

    PNChannel *channels[[names count]];
    
    // Set dictionary: Value is channel, key is msg.
    // The value is actually the name of the group, with the name of the member append on
    // For added security.
    // Suppose someone sends a message to "Family" and they mistakenly add you to that group
    // You will get the message, though that person is not part of your group!
    // Thus we append names on the back for added security
    NSMutableDictionary *msg = [[NSMutableDictionary alloc] init];
    [msg setValue:[[[Globals sharedInstance] selectedGroupName] stringByAppendingString: [[Globals sharedInstance] userNumber]] forKey:message.text];
    
    for(int j = 0; j < [names count]; j++) {
        PNChannel *c = [PNChannel channelWithName: names[j] shouldObservePresence:YES];
        channels[j] = c;
        [PubNub sendMessage: msg toChannel:channels[j]];
    }
    
    NSMutableDictionary * msgDict = [[NSMutableDictionary alloc] init];
    [msgDict setDictionary: [[Globals sharedInstance] groupMess]];
    NSMutableArray *temp = [[NSMutableArray alloc] init];
    temp = [msgDict valueForKey: [[Globals sharedInstance] selectedGroupName]] ;
        
    NSArray *dateSender = [[NSArray alloc] initWithObjects: [NSDate dateWithTimeIntervalSinceNow:0], @"Me", nil];
    NSMutableDictionary *msgDate = [[NSMutableDictionary alloc] init];
    [msgDate setObject: dateSender forKey: message.text];
    [temp addObject: msgDate];
        
    [msgDict removeObjectForKey: [[Globals sharedInstance] selectedGroupName]];
    [msgDict setObject: temp forKey: [[Globals sharedInstance] selectedGroupName]];
    [[Globals sharedInstance] setGroupMess: msgDict];
        
    // Call to ViewWillAppear so that most recent messages viewed
    [self viewWillAppear: YES];
    
    message.text = @"";
    [message resignFirstResponder];
    
    // Save variables
    [[Globals sharedInstance] saveVariables];
}