swift - Loading gif before adding cell in tableview -

i'm simulating chat , wanted know how show loading gif before message bubble added in tableview.

add message function:

func addmessage() {     var message: imessage     message = imessage.initimessagewithname(self.name, message: self.text, time:self.currenthour(), type "self")     self.updatetableview(message) } 

updatetableview:

func updatetableview(msg: anyobject) {      self.chattable!.beginupdates()      let row1 nsindexpath = nsindexpath(forrow: currentmessages!.count, insection: 0)      currentmessages!.insertobject(msg, atindex: currentmessages!.count)      self.chattable!.insertrowatindexpaths(nsarray(objects: row1) as! [nsindexpath], withrowanimation: uitableviewrowanimation.bottom)      self.chattable!.endupdates()       if self.chattable!.numberofrowsinsection(0) != 0 {           let ip: nsindexpath = nsindexpath(forrow: self.chattable!.numberofrowsinsection(0)-1, insection: 0)           chattable?.scrolltorowindexpath(ip, atscrollposition:uitableviewscrollposition.bottom, animated: true)      } }