如何仅使用xmpp框架在Facebook上列出在线用户 [英] How to list only online users on facebook with xmpp framework

问题描述

我已经在我的应用程序中集成了xmpp，并且能够在表格视图中列出所有的用户，但是我只想显示在线用户，然后想要实现该功能来发送和接收消息给我的在线朋友...

请给我一些有用的代码...

这是我的代码，在Facebook登录后执行。 / p>

   - （void）fbDidLogin 
 {
 NSLog（@登录....... ..............）; 
 [appDelegate.facebook requestWithGraphPath：@meandDelegate：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]]; 
 
 //您可能需要根据您连接的服务器来更改这些设置
 allowSelfSignedCertificates = NO; 
 allowSSLHostNameMismatch = YES; 
 
 //在上面输入了正确的信息后，取消注释。 
 NSError * error = nil; 
 if（！[xmppStreamFB connect：& error]）
 NSLog（@连接错误：％@，错误）; 
 
 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]; 
 
} 
  

我不知道xmpp框架的实际流程用于在线显示用户和实现聊天功能...

 我还有以下代理方法.. 
 
  - （void）xmppStreamDidSecure：（XMPPStreamFacebook *）sender 
 {
 NSLog（@---------- xmppStreamDidSecure：---------- ）; 
} 
 
  - （void）xmppStreamDidConnect :( XMPPStreamFacebook *）sender 
 {
 NSLog（@---------- xmppStreamDidConnect： ---------）; 
 
 isOpen = YES; 
 
 NSError * error = nil; 
 
如果（！[self.xmppStreamFB authenticateWithAppId：_APP_ID accessToken：self.accessToken错误：& error]）
 {
 NSLog（@验证错误：％@，错误）; 
} 
 else {
 NSLog（@NO错误认证：）; 
 / * 
 ChatViewController * cvc = [[ChatViewController alloc] init]; 
 [self.view addSubview：cvc.view]; * / 
} 
 
} 
  - （void）xmppStreamDidAuthenticate :( XMPPStream *）sender 
 {
 NSLog（@---------- xmppStreamDidAuthenticate：----------）; 
 
 [self goOnline]; 
} 
 
  - （void）xmppStream：（XMPPStream *）sender didNotAuthenticate :( NSXMLElement *）错误
 {
 NSLog（@------ ---- xmppStream：didNotAuthenticate：----------）; 
} 
 
  - （BOOL）xmppStream：（XMPPStream *）发件人didReceiveIQ：（XMPPIQ *）iq 
 {
 NSLog（@------ ---- xmppStream：didReceiveIQ：----------）; 
 / * 
 ChatViewController * cvc = [[ChatViewController alloc] init]; 
 [self.view addSubview：cvc.view]; * / 
 
 return NO; 
} 
 
  - （void）xmppStream：（XMPPStream *）发件人didReceiveMessage：（XMPPMessage *）消息
 {
 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： ---------）; 
 
如果（！isOpen）
 {
 NSLog（@无法连接到服务器，检查xmppStream.hostName）; 
} 
} 
  

这两种在线和离线用户存在的方法，但是不知道如何修改我们的任务：

   - （void）goOnline 
 {
 NSXMLElement * presence = [NSXMLElement elementWithName：@presence]; 
 
 [[self xmppStream] sendElement：presence]; 
} 
 
  - （void）goOffline 
 {
 NSXMLElement * presence = [NSXMLElement elementWithName：@presence]; 
 [presence addAttributeWithName：@typestringValue：@unavailable]; 
 
 [[self xmppStream] sendElement：presence]; 
} 
  

解决方案

发现如何显示在线/离线/离开用户。

我将逐步告诉你我是如何做到的，所以我可以为

步骤1-点击聊天按钮我正在调用以下方法 -

   - （void）chatFacebook 
 {
 if（appDelegate.facebook == nil）
 {
 appDelegate.facebook = [[[ Facebook alloc] initWithAppId：_APP_ID] autorelease]; 
} 
 
 if（！accessToken）
 {
 [appDelegate.facebook authorize：[XMPPStreamFacebook permissions] delegate：self appAuth：NO safariAuth：NO]; 
} 
 else 
 {
 [self fbDidLogin]; 
} 
  

}

步骤2-现在它的登录对话委托方法进入的时间，如果登录成功，fbDidLogin被调用，这里是代理方法你应该包括 -

  #pragma mark FBLoginDialogDelegate 
  

/ **
*调用当用户成功登录时
* /

   - （void）fbDidLogin 
 {
 NSLog（@登录.....................）; 
 [appDelegate.facebook requestWithGraphPath：@meandDelegate：self]; 
 
 DDLogVerbose（@％s accessToken：％@ expirationDate：％@，__ PRETTY_FUNCTION __，appDelegate.facebook.accessToken，appDelegate.facebook.expirationDate）; 
 self.accessToken = appDelegate.facebook.accessToken; 
 
 if（xmppStream）{
 [xmppStream release]; 
 xmppStream = nil; 
} 
 xmppStream = [[XMPPStreamFacebook alloc] init]; 
 xmpReconnect = [[XMPPReconnect alloc] initWithStream：xmppStream]; 
 
 if（xmppRosterStorage）{
 [xmppRosterStorage release]; 
 xmppRosterStorage = nil; 
} 
 xmppRosterStorage = [[XMPPRosterCoreDataStorage alloc] init]; 
 
 if（xmppRoster）{
 [xmppRoster release]; 
 xmppRoster = nil; 
} 
 xmppRoster = [[XMPPRoster alloc] initWithStream：xmppStream rosterStorage：xmppRosterStorage]; 
 
 [xmppStream addDelegate：self]; 
 [xmppRoster addDelegate：self]; 
 [xmppRoster setAutoRoster：YES]; 
 
 xmppStream.myJID = [XMPPJID jidWithString：[NSString stringWithFormat：@％@@ chat.facebook.com，uid]]; 
 
 //您可能需要根据您连接的服务器来更改这些设置
 allowSelfSignedCertificates = NO; 
 allowSSLHostNameMismatch = YES; 
 
 //在上面输入了正确的信息后，取消注释。 
 NSError * error = nil; 
 if（！[xmppStream connect：& error]）
 NSLog（@连接错误：％@，错误）; 
 
 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]; 
  

}

/ **
*当用户在不登录的情况下关闭对话框时调用
* /

   - （void）fbDidNotLogin： （BOOL）取消
 {
 UIAlertView * alert = [[UIAlertView alloc] initWithTitle：@已取消消息：@登录cancled委托：self cancelButtonTitle：@OKotherButtonTitles：nil，nil] ; 
 [alert show]; 
 [alert release]; 
} 
  

/ **
*用户注销时调用。
* /

   - （void）fbDidLogout 
 {
 UIAlertView * alert = [[ UIAlertView alloc] initWithTitle：@已注销消息：@已注销委托：self cancelButtonTitle：@OKotherButtonTitles：nil，nil]; 
 [alert show]; 
 [alert release]; 
} 
  

步骤3- fbDidLogin方法的第二行调用FBRequestDelegate方法，以便您应该在您的.h类中包含此协议，以获取用户需要实现以下方法的用户（其中​​登录，表示当前用户）的使用 -

pragma mark

pragma mark FBRequestDelegate

   - （void）request ：（FBRequest *）请求didFailWithError :( NSError *）错误{
 DDLogError（@％s％@，__ PRETTY_FUNCTION __，错误）; 
 //[appDelegate.facebook logout：self]; 
} 
  

/ **
*当请求返回时调用它的响应已被解析为一个对象。
*生成的对象可能是字典，数组，字符串或数字，取决于API响应的格式的
*。
* /

   - （void）request：（FBRequest *）request didLoad：（id）result {
 DDLogVerbose（@％s ............ DDLOG ...................％@，__ PRETTY_FUNCTION __，result）; 
 
 NSLog（@Result>>>> -------％@，result）; 
 
 NSMutableDictionary * dict = [NSMutableDictionary dictionaryWithDictionary：（NSMutableDictionary *）result]; 
 
 uid = [dict objectForKey：@id]; 
 NSLog（@iddddddddddd ---％@，uid）; 
 
} 
  

步骤4-现在来看表格视图DataSource和Delegate方法，你需要实现这些，这里有方法 -

   - （NSInteger）numberOfSectionsInTableView：（UITableView *）tableView1 
 {
 return [[[self fetchedResultsController] sections] count]; 
  

//需要实现NSFetchedResultsControllerDelegate
}

$ b $（$）$（$）$（$）$（$）$（$）$（$）$（$）$ {code $

{
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; 
案例1：return @Away; 
默认值：return @离线; 
} 
} 
 
 
} 
 return @; 
} 
 
 
  - （NSInteger）tableView：（UITableView *）tableView1 numberOfRowsInSection：（NSInteger）sectionIndex 
 {
 NSArray * sections = [[self fetchedResultsController] sections]; 
 
 if（sectionIndex< [sections count]）
 {
 id< NSFetchedResultsSectionInfo> sectionInfo = [sections objectAtIndex：sectionIndex]; 
 return sectionInfo.numberOfObjects; 
 NSLog（@section ifnfo ===========％@，sectionInfo）; 
} 
} 
 return 0; 
} 
 
  - （UITableViewCell *）tableView：（UITableView *）tableView1 cellForRowAtIndexPath :( NSIndexPath *）indexPath 
 {
 static NSString * CellIdentifier = @Cell ; 
 
 UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier：CellIdentifier]; 
 if（cell == nil）
 {
 cell = [[[UITableViewCell alloc] initWithStyle：UITableViewCellStyleDefault 
 reuseIdentifier：CellIdentifier] autorelease]; 
} 
 
 tableView.separatorStyle = UITableViewCellSeparatorStyleNone; 
 [cell setSelectionStyle：UITableViewCellSelectionStyleGray]; 
 
 user = [[self fetchedResultsController] objectAtIndexPath：indexPath]; 
 
 cell.textLabel.text = user.displayName; 
 
 cell.textLabel.textColor = [UIColor whiteColor]; 
 
 
 cell1 = cell; 
  

}

步骤5-最后你还需要实现NSFetchedResultsController代理方法，这样就可以用聊天用户填写表，这里是方法 -

   - （ NSFetchedResultsController *）fetchedResultsController 
 {
 if（fetchedResultsController == nil）
 {
 NSEntityDescription * entity = [NSEntityDescription entityForName：@XMPPUserCoreDataStorage
 inManagedObjectContext：[self managedObjectContext ]]; 
 
 NSSortDescriptor * sd1 = [[NSSortDescriptor alloc] initWithKey：@sectionNumascending：YES]; 
 NSSortDescriptor * sd2 = [[NSSortDescriptor alloc] initWithKey：@displayNameascending：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：[self managedObjectContext] 
 sectionNameKeyPath：@sectionNum
 cacheName：nil]; 
 [fetchedResultsController setDelegate：self]; 
 
 [sd1 release]; 
 [sd2 release]; 
 [fetchRequest release]; 
 
 NSError * error = nil; 
 if（！[fetchedResultsController performFetch：& error]）
 {
 NSLog（@执行抓取错误：％@，错误） 
} 
} 
 
 return fetchedResultsController; 
} 
 
  - （void）controllerDidChangeContent :( NSFetchedResultsController *）控制器
 {
 [[self tableView] reloadData]; 
} 
  

步骤6 - 编译并运行您的代码，用户列表应显示在表视图中

如果有任何问题出现，请分享，我总是在这里帮助您。请不要介意，如果发布这个答案有一些错误，我会

谢谢。

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...

Please suggest me some helpful code...

Here is my code, executed after facebook login.

    - (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:&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];

}

I don't know the actual flow of the xmpp framework for showing users online and to implement chat feature...

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:&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");
    }
}

And the two methods for online and offline user presence, but don't know how to modify them for my task:

    - (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];
}

解决方案

finally after lots of efforts i found out how to show online/offline/away users.

i'm going to tell you step by step how i did it, so that i can be useful for the less experienced users too..

Step 1- on click of chat button i'm calling the following method-

-(void) chatFacebook
{
   if (appDelegate.facebook == nil)
   {
     appDelegate.facebook = [[[Facebook alloc] initWithAppId:_APP_ID] autorelease];
   }

if (!accessToken)
{
    [appDelegate.facebook authorize:[XMPPStreamFacebook permissions] delegate:self appAuth:NO safariAuth:NO]; 
}
else
{
    [self fbDidLogin];
}

}

step 2- Now its time for login dialog delegate methods to come in , if the login is successfull the fbDidLogin is called, here are the delegate methods you should include-

#pragma mark FBLoginDialogDelegate

/** * Called when the user successfully logged in. */

- (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 (xmppStream) {  
    [xmppStream release];  
    xmppStream = nil;  
}
xmppStream = [[XMPPStreamFacebook alloc] init];
xmpReconnect = [[XMPPReconnect alloc] initWithStream:xmppStream];  

if (xmppRosterStorage) {  
    [xmppRosterStorage release];  
    xmppRosterStorage = nil;  
}
xmppRosterStorage = [[XMPPRosterCoreDataStorage alloc] init];

if (xmppRoster) {  
    [xmppRoster release];  
    xmppRoster = nil;  
} 
xmppRoster = [[XMPPRoster alloc] initWithStream:xmppStream rosterStorage:xmppRosterStorage];

[xmppStream addDelegate:self];
[xmppRoster addDelegate:self];
[xmppRoster setAutoRoster:YES];

xmppStream.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 (![xmppStream connect:&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];

}

/** * Called when the user dismissed the dialog without logging in. */

  - (void)fbDidNotLogin:(BOOL)cancelled
  {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Canceled" message:@"Login cancled" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alert show];
[alert release];
}

/** * Called when the user logged out. */

  - (void)fbDidLogout
 {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Logged out" message:@"Logged out" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alert show];
[alert release];
  }

Step 3- The second line of the fbDidLogin method calls the FBRequestDelegate methods so you should include this protocol in your .h class, to get the uid of the user(which is logged in , means the current user) you need to implement the following methods-

pragma mark

pragma mark FBRequestDelegate

  - (void)request:(FBRequest*)request didFailWithError:(NSError*)error{ 
     DDLogError(@"%s %@",__PRETTY_FUNCTION__,error); 
     //[appDelegate.facebook logout:self]; 
 } 

/** * Called when a request returns and its response has been parsed into an object. * The resulting object may be a dictionary, an array, a string, or a number, depending * on thee format of the API response. */

  - (void)request:(FBRequest*)request didLoad:(id)result { 
    DDLogVerbose(@"%s............DDLOG................... %@",__PRETTY_FUNCTION__,result); 

NSLog(@" Result>>>>-------%@", result);

NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithDictionary:(NSMutableDictionary *)result];

uid = [dict objectForKey:@"id"];
NSLog(@"iddddddddddddd---%@", uid);

 } 

Step 4- Now comes the table view DataSource and Delegate methods, you need to implement these, here are the methods-

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView1
{
    return [[[self fetchedResultsController] sections] count];

// need to implement NSFetchedResultsControllerDelegate }

- (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 *)tableView1 numberOfRowsInSection:(NSInteger)sectionIndex
 {
    NSArray *sections = [[self fetchedResultsController] sections];

    if (sectionIndex < [sections count])
    {
        id <NSFetchedResultsSectionInfo> sectionInfo = [sections objectAtIndex:sectionIndex];
        return sectionInfo.numberOfObjects;
        NSLog(@"section ifnfo ===========%@", sectionInfo);
    }   
}
return 0;
  }

- (UITableViewCell *)tableView:(UITableView *)tableView1 cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
   static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                                       reuseIdentifier:CellIdentifier] autorelease];
    }

    tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    [cell setSelectionStyle:UITableViewCellSelectionStyleGray];

    user = [[self fetchedResultsController] objectAtIndexPath:indexPath];

    cell.textLabel.text = user.displayName;

    cell.textLabel.textColor = [UIColor whiteColor];


    cell1 = cell;

}

Step 5- Finally you also need to implement NSFetchedResultsController delegate methods , so that you can fill table with the chat users, here are the methods-

- (NSFetchedResultsController *)fetchedResultsController
{
if (fetchedResultsController == nil)
{
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"XMPPUserCoreDataStorage"
                                              inManagedObjectContext:[self managedObjectContext]];

    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:[self managedObjectContext]
                                                                     sectionNameKeyPath:@"sectionNum"
                                                                              cacheName:nil];
    [fetchedResultsController setDelegate:self];

    [sd1 release];
    [sd2 release];
    [fetchRequest release];

    NSError *error = nil;
    if (![fetchedResultsController performFetch:&error])
    {
        NSLog(@"Error performing fetch: %@", error);
    }
}

return fetchedResultsController;
 }

  - (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
 {
[[self tableView] reloadData];
 }

Step 6 - Compile and run your code ,user list should appear in table view

if any problems appears, please share , i'm always here to help you .And please dont mind if there are some mistakes while posting this answer, cz i'm posting just for the third time

Thanks.

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