- (void)connect {
  if (self.xmppStream == nil) {
    self.xmppStream = [[XMPPStream alloc] init];
    [self.xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
  }
  if (![self.xmppStream isConnected]) {
    NSString *username = [[NSUserDefaults standardUserDefaults] objectForKey:@"username"];
    XMPPJID *jid = [XMPPJID jidWithUser:username domain:@"lizhen" resource:@"Ework"];
    [self.xmppStream setMyJID:jid];
    [self.xmppStream setHostName:@"10.4.125.113"];
    NSError *error = nil;
    if (![self.xmppStream connect:&error]) {
      NSLog(@"Connect Error: %@", [[error userInfo] description]);
    }
  }
}

- (void)xmppStream:(XMPPStream *)sender socketDidConnect:(GCDAsyncSocket *)socket

- (void)xmppStreamDidConnect:(XMPPStream *)sender

- (void)xmppStreamDidAuthenticate:(XMPPStream *)sender

- (void)xmppStreamDidAuthenticate:(XMPPStream *)sender {
  XMPPPresence *presence = [XMPPPresence presenceWithType:@"available"];
  [self.xmppStream sendElement:presence];
}

- (void)disconnect {
  XMPPPresence *presence = [XMPPPresence presenceWithType:@"unavailable"];
  [self.xmppStream sendElement:presence];
   
  [self.xmppStream disconnect];
}

- (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence
 
...

- (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence {
  NSString *presenceType = [presence type];
  NSString *presenceFromUser = [[presence from] user];
  if (![presenceFromUser isEqualToString:[[sender myJID] user]]) {
    if ([presenceType isEqualToString:@"available"]) {
      //
    } else if ([presenceType isEqualToString:@"unavailable"]) {
      //
    }
  }
}

- (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message {
  NSString *messageBody = [[message elementForName:@"body"] stringValue];
}

- (void)sendMessage:(NSString *) message toUser:(NSString *) user {
  NSXMLElement *body = [NSXMLElement elementWithName:@"body"];
  [body setStringValue:message];
  NSXMLElement *message = [NSXMLElement elementWithName:@"message"];
  [message addAttributeWithName:@"type" stringValue:@"chat"];
  NSString *to = [NSString stringWithFormat:@"%@@example.com", user];
  [message addAttributeWithName:@"to" stringValue:to];
  [message addChild:body];
  [self.xmppStream sendElement:message];
}

[_xmppRoster fetchRoster];//获取好友列表
//获取到一个好友节点
- (void)xmppRoster:(XMPPRoster *)sender didRecieveRosterItem:(NSXMLElement *)item
//获取完好友列表
- (void)xmppRosterDidEndPopulating:(XMPPRoster *)sender
//到服务器上请求联系人名片信息
- (void)fetchvCardTempForJID:(XMPPJID *)jid;
//请求联系人的名片，如果数据库有就不请求，没有就发送名片请求
- (void)fetchvCardTempForJID:(XMPPJID *)jid ignoreStorage:(BOOL)ignoreStorage;
//获取联系人的名片，如果数据库有就返回，没有返回空，并到服务器上抓取
- (XMPPvCardTemp *)vCardTempForJID:(XMPPJID *)jid shouldFetch:(BOOL)shouldFetch;
//更新自己的名片信息
- (void)updateMyvCardTemp:(XMPPvCardTemp *)vCardTemp;
//获取到一盒联系人的名片信息的回调
- (void)xmppvCardTempModule:(XMPPvCardTempModule *)vCardTempModule 
    didReceivevCardTemp:(XMPPvCardTemp *)vCardTemp 
           forJID:(XMPPJID *)jid

 //name为用户账号
  - (void)XMPPAddFriendSubscribe:(NSString *)name
  {
    //XMPPHOST 就是服务器名， 主机名
    XMPPJID *jid = [XMPPJID jidWithString:[NSString stringWithFormat:@"%@@%@",name,XMPPHOST]];
    //[presence addAttributeWithName:@"subscription" stringValue:@"好友"];
    [xmppRoster subscribePresenceToUser:jid];
     
  }

 - (void)xmppRoster:(XMPPRoster *)sender didReceivePresenceSubscriptionRequest:(XMPPPresence *)presence
  {
    //取得好友状态
    NSString *presenceType = [NSString stringWithFormat:@"%@", [presence type]]; //online/offline
    //请求的用户
    NSString *presenceFromUser =[NSString stringWithFormat:@"%@", [[presence from] user]];
    NSLog(@"presenceType:%@",presenceType);
     
    NSLog(@"presence2:%@ sender2:%@",presence,sender);
     
    XMPPJID *jid = [XMPPJID jidWithString:presenceFromUser];
    //接收添加好友请求
    [xmppRoster acceptPresenceSubscriptionRequestFrom:jid andAddToRoster:YES];
     
  }

//删除好友，name为好友账号
- (void)removeBuddy:(NSString *)name 
{ 
  XMPPJID *jid = [XMPPJID jidWithString:[NSString stringWithFormat:@"%@@%@",name,XMPPHOST]]; 
    
  [self xmppRoster] removeUser:jid]; 
}

XMPPJID *roomJID = [XMPPJID jidWithString:ROOM_JID];
   
  xmppRoom = [[XMPPRoom alloc] initWithRoomStorage:self jid:roomJID];
   
  [xmppRoom activate:xmppStream];
  [xmppRoom addDelegate:self delegateQueue:dispatch_get_main_queue()];

- (void)xmppRoomDidCreate:(XMPPRoom *)sender
  {
    DDLogInfo(@"%@: %@", THIS_FILE, THIS_METHOD);
  }

 [xmppRoom joinRoomUsingNickname:@"quack" history:nil];

  - (void)xmppRoomDidJoin:(XMPPRoom *)sender
  {
    [xmppRoom fetchConfigurationForm];
    [xmppRoom fetchBanList];
    [xmppRoom fetchMembersList];
    [xmppRoom fetchModeratorsList];
  }

 // 收到禁止名单列表
  - (void)xmppRoom:(XMPPRoom *)sender didFetchBanList:(NSArray *)items;
  // 收到好友名单列表
  - (void)xmppRoom:(XMPPRoom *)sender didFetchMembersList:(NSArray *)items;
  // 收到主持人名单列表
  - (void)xmppRoom:(XMPPRoom *)sender didFetchModeratorsList:(NSArray *)items;

 - (void)xmppRoom:(XMPPRoom *)sender didNotFetchBanList:(XMPPIQ *)iqError;
  - (void)xmppRoom:(XMPPRoom *)sender didNotFetchMembersList:(XMPPIQ *)iqError;
  - (void)xmppRoom:(XMPPRoom *)sender didNotFetchModeratorsList:(XMPPIQ *)iqError;

[xmppRoom deactivate:xmppStream];

 - (void)xmppRoomDidLeave:(XMPPRoom *)sender
  {
    DDLogVerbose(@"%@: %@", THIS_FILE, THIS_METHOD);
  }

 - (void)xmppRoom:(XMPPRoom *)sender occupantDidJoin:(XMPPJID *)occupantJID
  {
    DDLogVerbose(@"%@: %@", THIS_FILE, THIS_METHOD);
  }

 - (void)xmppRoom:(XMPPRoom *)sender occupantDidLeave:(XMPPJID *)occupantJID
  {
    DDLogVerbose(@"%@: %@", THIS_FILE, THIS_METHOD);
  }

 - (void)xmppRoom:(XMPPRoom *)sender didReceiveMessage:(XMPPMessage *)message fromOccupant:(XMPPJID *)occupantJID
  {
    DDLogVerbose(@"%@: %@", THIS_FILE, THIS_METHOD);
  }

NSString *siID = [XMPPStream generateUUID];
  //发送消息
  XMPPMessage *message = [XMPPMessage messageWithType:@"chat" to:jid elementID:siID];
  NSXMLElement *receipt = [NSXMLElement elementWithName:@"request" xmlns:@"urn:xmpp:receipts"];
  [message addChild:receipt];
  [message addBody:@"测试"];
  [self.xmppStream sendElement:message];

 - (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message
  {
    //回执判断
    NSXMLElement *request = [message elementForName:@"request"];
    if (request)
    {
      if ([request.xmlns isEqualToString:@"urn:xmpp:receipts"])//消息回执
      {
        //组装消息回执
        XMPPMessage *msg = [XMPPMessage messageWithType:[message attributeStringValueForName:@"type"] to:message.from elementID:[message attributeStringValueForName:@"id"]];
        NSXMLElement *recieved = [NSXMLElement elementWithName:@"received" xmlns:@"urn:xmpp:receipts"];
        [msg addChild:recieved];
         
        //发送回执
        [self.xmppStream sendElement:msg];
      }
    }else
    {
      NSXMLElement *received = [message elementForName:@"received"];
      if (received)
      {
        if ([received.xmlns isEqualToString:@"urn:xmpp:receipts"])//消息回执
        {
          //发送成功
          NSLog(@"message send success!");
        } 
      } 
    } 
     
    //消息处理 
    //... 
  }

//初始化并启动ping
-(void)autoPingProxyServer:(NSString*)strProxyServer
{
  _xmppAutoPing = [[XMPPAutoPingalloc] init];
  [_xmppAutoPingactivate:_xmppStream];
  [_xmppAutoPingaddDelegate:selfdelegateQueue: dispatch_get_main_queue()];
  _xmppAutoPing.respondsToQueries = YES;
  _xmppAutoPing.pingInterval=2;//ping 间隔时间
  if (nil != strProxyServer)
  {
    _xmppAutoPing.targetJID = [XMPPJID jidWithString: strProxyServer ];//设置ping目标服务器，如果为nil,则监听socketstream当前连接上的那个服务器
  }
}
//卸载监听
 [_xmppAutoPing  deactivate];
 [_xmppAutoPing  removeDelegate:self];
  _xmppAutoPing = nil;
//ping XMPPAutoPingDelegate的委托方法:
- (void)xmppAutoPingDidSendPing:(XMPPAutoPing *)sender
{
  NSLog(@"- (void)xmppAutoPingDidSendPing:(XMPPAutoPing *)sender");
}
- (void)xmppAutoPingDidReceivePong:(XMPPAutoPing *)sender
{
  NSLog(@"- (void)xmppAutoPingDidReceivePong:(XMPPAutoPing *)sender");
}
  
- (void)xmppAutoPingDidTimeout:(XMPPAutoPing *)sender
{
  NSLog(@"- (void)xmppAutoPingDidTimeout:(XMPPAutoPing *)sender");
}