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POHow to list only online users on facebook with xmpp framework
 

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  1. POHow to list only online users on facebook with xmpp framework
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    <p>I have integrated xmpp in my app and able to list all the users in a table view, but I only want to display the online users and then want to implement the feature to send and recieve messages to my online friends... </p> <p>Please suggest me some helpful code... </p> <p>Here is my code, executed after facebook login.</p> <pre><code> - (void)fbDidLogin { NSLog(@"logged in....................."); [appDelegate.facebook requestWithGraphPath:@"me" andDelegate:self]; DDLogVerbose(@"%s accessToken: %@ expirationDate: %@",__PRETTY_FUNCTION__,appDelegate.facebook.accessToken,appDelegate.facebook.expirationDate); self.accessToken = appDelegate.facebook.accessToken; if (xmppStreamFB) { [xmppStreamFB release]; xmppStreamFB = nil; } xmppStreamFB = [[XMPPStreamFacebook alloc] init]; xmpReconnect = [[XMPPReconnect alloc] initWithStream:xmppStreamFB]; if (xmppRosterStorage) { [xmppRosterStorage release]; xmppRosterStorage = nil; } xmppRosterStorage = [[XMPPRosterCoreDataStorage alloc] init]; if (xmppRoster) { [xmppRoster release]; xmppRoster = nil; } xmppRoster = [[XMPPRoster alloc] initWithStream:xmppStreamFB rosterStorage:xmppRosterStorage]; [xmppStreamFB addDelegate:self]; [xmppRoster addDelegate:self]; [xmppRoster setAutoRoster:YES]; xmppStreamFB.myJID = [XMPPJID jidWithString:[NSString stringWithFormat:@"%@@chat.facebook.com", uid]]; // You may need to alter these settings depending on the server you're connecting to allowSelfSignedCertificates = NO; allowSSLHostNameMismatch = YES; // Uncomment me when the proper information has been entered above. NSError *error = nil; if (![xmppStreamFB connect:&amp;error]) NSLog(@"Error connecting: %@", error); if(!tableView) { tableView = [[UITableView alloc]initWithFrame:CGRectMake(0,0, 480, 320) style:UITableViewStylePlain]; } [tableView setFrame:CGRectMake(0,0, 480, 320)]; [tableView setTag:2]; [tableView setDelegate:self]; [tableView setDataSource:self]; [tableView setHidden:NO]; [tableView setBackgroundColor:[UIColor clearColor]]; [tableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine]; [tableView setAlpha:1.0]; [self.view addSubview:tableView]; [self.tableView reloadData]; [self showTopBar]; } </code></pre> <p>I don't know the actual flow of the xmpp framework for showing users online and to implement chat feature... </p> <pre><code>i have the following delegate methods as well.. - (void)xmppStreamDidSecure:(XMPPStreamFacebook *)sender { NSLog(@"---------- xmppStreamDidSecure: ----------"); } - (void)xmppStreamDidConnect:(XMPPStreamFacebook *)sender { NSLog(@"---------- xmppStreamDidConnect: ----------"); isOpen = YES; NSError *error = nil; if (![self.xmppStreamFB authenticateWithAppId:_APP_ID accessToken:self.accessToken error:&amp;error]) { NSLog(@"Error authenticating: %@", error); } else { NSLog(@"NO Error authenticating:"); /* ChatViewController *cvc = [[ChatViewController alloc] init]; [self.view addSubview:cvc.view];*/ } } - (void)xmppStreamDidAuthenticate:(XMPPStream *)sender { NSLog(@"---------- xmppStreamDidAuthenticate: ----------"); [self goOnline]; } - (void)xmppStream:(XMPPStream *)sender didNotAuthenticate:(NSXMLElement *)error { NSLog(@"---------- xmppStream:didNotAuthenticate: ----------"); } - (BOOL)xmppStream:(XMPPStream *)sender didReceiveIQ:(XMPPIQ *)iq { NSLog(@"---------- xmppStream:didReceiveIQ: ----------"); /* ChatViewController *cvc = [[ChatViewController alloc] init]; [self.view addSubview:cvc.view];*/ return NO; } - (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message { NSLog(@"---------- xmppStream:didReceiveMessage: ----------"); } - (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence { NSLog(@"---------- xmppStream:didReceivePresence: ----------"); } - (void)xmppStream:(XMPPStream *)sender didReceiveError:(id)error { NSLog(@"---------- xmppStream:didReceiveError: ----------"); } - (void)xmppStreamDidDisconnect:(XMPPStream *)sender { NSLog(@"---------- xmppStreamDidDisconnect: ----------"); if (!isOpen) { NSLog(@"Unable to connect to server. Check xmppStream.hostName"); } } </code></pre> <p>And the two methods for online and offline user presence, but don't know how to modify them for my task:</p> <pre><code> - (void)goOnline { NSXMLElement *presence = [NSXMLElement elementWithName:@"presence"]; [[self xmppStream] sendElement:presence]; } - (void)goOffline { NSXMLElement *presence = [NSXMLElement elementWithName:@"presence"]; [presence addAttributeWithName:@"type" stringValue:@"unavailable"]; [[self xmppStream] sendElement:presence]; } </code></pre>
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    1. COVery helpful indeed: http://msmvps.com/blogs/jon_skeet/archive/2010/08/29/writing-the-perfect-question.aspx
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    2. COHello Rakesh, That's great suggestion but what is `managedObjectContext`. Can you please give us a sample code so we can understand it. Thanks in Advance.
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