swift - xmppframework 的 didReceive 存在无法正常工作

Question

我正在使用 func xmppStream(_ sender: XMPPStream, didReceive presence: XMPPPresence) 来管理在线离线状态。这个功能对于一对一用户来说工作正常，但它不能在多个用户上正常工作用户。

例如，我有 3 个用户 A、B 和 C，现在情况是在线离线状态对于 A 到 B 和 B 到 A 工作正常，如 func xmppStream(_ sender: XMPPStream, didReceive presence: XMPPPresence) 函数调用得很好。但如果 C 用户检查 A 或 B 的状态，则 func xmppStream(_ sender: XMPPStream, didReceive presence: XMPPPresence) 不会被调用。

我无法理解问题所在。这是我的代码:

func xmppStream(_ sender: XMPPStream, didReceive presence: XMPPPresence) {
    let presenceType = presence.type
    let myUsername = sender.myJID?.user

    print("myusername \(myUsername)")

    if let usr = presence.from?.user {

        print("didReceive :- \(presenceType)")
        print("didReceive usr :- \(usr)")

        if usr != myUsername {
            if presenceType == "available" {
                let dict: NSDictionary = ["presenceType":"1",
                                          "user_id":usr]
                if !APP_DELEGATE.arrPresentUser.contains(dict) {
                    APP_DELEGATE.arrPresentUser.add(dict)
                }
            } else {
                let pred : NSPredicate = NSPredicate(format: "user_id = %@", usr)
                let approvalRequestArray =  APP_DELEGATE.arrPresentUser.filtered(using: pred) as NSArray
                if approvalRequestArray.count > 0 {
                    let dict = approvalRequestArray.object(at: 0) as! NSDictionary
                    APP_DELEGATE.arrPresentUser.remove(dict)
                }
            }
            NotificationCenter.default.post(name: Notification.Name("ReceivedUserStatus"), object: nil)
        }
    }
}

注意:我也尝试过使用@objc。(@objc func xmppStream(_ sender: XMPPStream, didReceive presence: XMPPPresence) )

Answer 1

如果你想检查特定用户的存在，使用这个。

  let query = XMLElement(name: "query", xmlns: "jabber:iq:last")
  let iq = XMPPIQ(type: "get", to: "User's JID here", elementID: xmppStream.generateUUID, child: query)
  self.xmppStream.send(iq)

获取委托(delegate)方法中的存在。

  func xmppStream(_ sender: XMPPStream, didReceive iq: XMPPIQ) -> Bool {
    if iq.isResultIQ {
      print(iq.from?.user)
      print(iq.lastActivitySeconds())
    }
  }