首先需要建立一個房間：

xmppRoom = [[XMPPRoom alloc] initWithRoomStorage:self jid:[XMPPJID jidWithString:[NSString stringWithFormat:@"%@@%@", jidString, @"conference.192.168.1.117"]]];
    [xmppRoom activate:xmppStream];
    [xmppRoom addDelegate:self delegateQueue:dispatch_get_main_queue()];

加入房間：

[[self xmppRoom] joinRoomUsingNickname:[[[NSUserDefaults standardUserDefaults] objectForKey:@"UserInfo"] valueForKey:@"userId"] history:nil];
 

其次邀請好友：

[[self xmppRoom] inviteUser:[XMPPJID jidWithString:[NSString stringWithFormat:@"%@@192.168.1.117", friendIDFeild.text]] withMessage:@"join room!"];

新建一個XMPPMUC：

xmppMUC = [[XMPPMUC alloc] initWithDispatchQueue:dispatch_get_main_queue()];
    [xmppMUC activate:xmppStream];
    [xmppMUC addDelegate:self delegateQueue:dispatch_get_main_queue()];
 

-(void)xmppMUC:(XMPPMUC *)sender roomJID:(XMPPJID *)roomJID didReceiveInvitation:(XMPPMessage *)message
{
    NSLog(@"%@", message);
    xmppRoom = [[XMPPRoom alloc] initWithRoomStorage:self jid:roomJID];
    [xmppRoom activate:xmppStream];
    [xmppRoom addDelegate:self delegateQueue:dispatch_get_main_queue()];
    [xmppRoom joinRoomUsingNickname:[[[NSUserDefaults standardUserDefaults] objectForKey:@"UserInfo"] valueForKey:@"userId"] history:nil];
}
 

[xmppRoom joinRoomUsingNickname:[[[NSUserDefaults standardUserDefaults] objectForKey:@"UserInfo"] valueForKey:@"userId"] history:nil];

當你接受請求後，房間id會出現在聯絡人列表中，正常聊天就可以了，聊天資訊的type為groupchat，這部分在XMPP基礎中有，不做贅述。此為初步，後續補充。