Iphone 如何使用xmpp框架仅列出facebook上的在线用户

我已经在我的应用程序中集成了xmpp，能够在表视图中列出所有用户，但我只想显示在线用户，然后想实现向我的在线朋友发送和接收消息的功能

请给我推荐一些有用的代码

这是我的代码，在登录facebook后执行

    - (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];

}

我不知道xmpp框架用于在线显示用户和实现聊天功能的实际流程

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");
    }
}

以及在线和离线用户状态的两种方法，但不知道如何为我的任务修改它们：

    - (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];
}

---

经过大量的努力，我终于找到了如何显示在线/离线/异地用户的方法

我将一步一步地告诉你我是如何做到的，这样我也可以对经验不足的用户有用

第1步-点击聊天按钮，我调用以下方法-

-(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];
}

}

第2步-现在是登录对话框委托方法进入的时候了，如果登录成功，将调用fbDidLogin，下面是您应该包括的委托方法-

#pragma mark FBLoginDialogDelegate

/** *当用户成功登录时调用。 */

}

/** *当用户未登录就取消对话框时调用。 */

/** *当用户注销时调用。 */

步骤3-fbDidLogin方法的第二行调用FBRequestDelegate方法，因此您应该在.h类中包含此协议，以获取用户的uid（已登录，表示当前用户），您需要实现以下方法-

布拉格标记 pragma标记FBRequestDelegate /** *当请求返回且其响应已解析为对象时调用。 *结果对象可能是字典、数组、字符串或数字，具体取决于 *关于API响应的格式。 */

步骤4-现在是表视图数据源和委托方法，您需要实现这些方法，下面是这些方法-

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

- (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];
 }

//需要实现NSFetchedResultsControllerDelegate }

{ NSArray*节=[[self-fetchedResultsController]节]

    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;

第6步-编译并运行代码，用户列表应该出现在表视图中

如果出现任何问题，请分享，我总是在这里帮助你。请不要介意在发布这个答案时是否有一些错误，cz我只是第三次发布

---

谢谢。

非常有用：你好，拉凯什，这是一个很好的建议，但是什么是

managedObjectContext

。你能给我们一个示例代码让我们理解它吗。提前谢谢。你好，拉凯什，你能给我推荐任何关于Xmppframework的教程链接或演示或任何帮助吗。在authenticateWithPassword方法中，我遇到了这个错误或者messase—“摘要字符串解析错误”？ThanksHi Rakesh，我正在对mac执行相同的操作，authenticateWithPassword方法返回YES，但始终未调用Authenticate委托方法。您能为我提供任何链接吗？Thanksuid=[dict objectForKey:@“id”]；应替换为uid=[dict objectForKey:@“uid”]；@Rakesh我熟悉Facebook API，但对标准XMPP非常陌生，最近发布了这个问题（）。上面的方法是否能为彼此不是朋友的Facebook应用程序用户提供一种高效返回在线状态的方法？无论哪种方法，我都希望得到您的指导，谢谢。

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

  - (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);

 } 

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

- (NSString *)tableView:(UITableView *)sender titleForHeaderInSection:(NSInteger)sectionIndex

    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;

- (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];
 }