使用iOS和Swift 3的委托方法中未接收到xmpp状态

Question

I am using Mongoose. I'm on Ubuntu server and Swift 3 in client side. I am not able to get the user's presence in delegate function. I have implemented code like this for Subscripting presence, this is not calling

func xmppRoster(_ sender: XMPPRoster!, didReceivePresenceSubscriptionRequest presence: XMPPPresence!) {
        debugPrint("XMPPRoster : didReceivePresenceSubscriptionRequest ")
        debugPrint(presence)
        sender.acceptPresenceSubscriptionRequest(from: presence.from(), andAddToRoster: true)
    }

also when user is sending presence I am not able to get presence of user in this delegate method :

func xmppStream(sender: XMPPStream!, didReceivePresence presence: XMPPPresence!) {
        debugPrint(presence)

    }

Please let me know where I am getting wrong.

Answer 1

The problem is in guessing the correct conversion of method declarations from Objective-C to Swift. The following declaration of XMPPFramework callback works in Swift 4:

@objc func xmppStream(_ stream:XMPPStream, didReceivePresence presence:XMPPPresence) {
    print("\(presence)")
}