xcode - Need a solution to implement xmpp add friends in group chat and sending message to them in once in ios -

i'm having difficulties add friends, sending invitations , in group chat sending 1 message using xmpp. know need use xep-0045. not succeeded. can tell me how it.

1. send friend request 1 one chat.
2. send invitation join chat room.
3. send message chat room's friends.

if has sample code great..

thanks in advance

for #3 : send message chat room's friends.

-(void) sendgroupmessage:(nsstring *) groupjid message:(nsstring *)msg{      xmppjid *roomjid = [xmppjid jidwithstring:[nsstring stringwithformat:@"%@@conference.%@",groupjid,server_url]];      xmpproom *muc = [[xmpproom alloc] initwithroomstorage:xmpproomstorage jid:roomjid                                             dispatchqueue:dispatch_get_main_queue()];      [muc   activate:xmppstream];      [muc   adddelegate:self delegatequeue:dispatch_get_main_queue()];      [muc   sendmessagewithbody:msg];  }