didReceiveInvitation() is not being called in XMPPFramework and Swift 2

Question

I am creating chatting application like Whatsapp.
I have successfully write the functionality of Text chat, Image, Audio, Video Transfer. Now I am creating

Answer 1

Problem was in this code. Actually i was sending the bare id every time when i was inviting any user.

func xmppRoomDidJoin(sender: XMPPRoom!) {
        sender.fetchConfigurationForm()
        for JID in membersToInvite! {
            sender.editRoomPrivileges([XMPPRoom.itemWithAffiliation("member", jid: XMPPJID.jidWithString(JID))])
            sender.inviteUser(XMPPJID.jidWithString(JID), withMessage: "THIS IS GROUP MESSAGE")

        }

    }

BUT TO INVITE ANY USER YOU HAVE TO USE FULL ID.

For those who dont know

BareID = username@domain FullID = username@domain/resource

To resolve this

I hardcode the resource = APPNAME everywhere in JIDs in whole app.