progress bar - Unrecognized selector for instance error Swift -

im creating simple typing app timer. timer should in form of progress bar decrements every second.

to implement progressbar, intended set progress 0.1 lesser current progress every 1 second. there "unrecognized selector instance " error when set progress. there other way work around.

import foundation import uikit  class testview: uiviewcontroller, uitextinputtraits {       @iboutlet weak var testlabel: uilabel!     @iboutlet weak var typingfield: uitextfield!     @iboutlet weak var progressview: uiprogressview!      var time : float = 0.0     var timer: nstimer!     var test = 0;     var progress : float = 1     var mymutablestring = nsmutableattributedstring()     var teststringarray = ["abode" , "tutorial" , "completed",                             "war", "method", "continue",                             "machine", "texting" , "iterate"]     var idx = 0;         var setprog : float = 1           func textfielddidchange(textfield: uitextfield) {          let s = typingfield.text!          if(s.characters.last == " "){             let word = s.stringbytrimmingcharactersinset(nscharacterset.whitespacecharacterset())              if(!word.isempty){                 print(teststringarray[idx])                 if(word == teststringarray[idx]){                     idx++;                     typingfield.text = "";                     testlabel.text = teststringarray[idx];                 }else{                     typingfield.text = "";                 }             }         }     }      func setprogress() {         setprog -= 0.1         progressview.progress = setprog  <-- cannot decrement progress bar      }        override func viewdidload() {         super.viewdidload()           typingfield.autocorrectiontype = .no         typingfield.autocapitalizationtype = .none           timer = nstimer.scheduledtimerwithtimeinterval(1, target: self, selector:selector("setprogress"), userinfo: nil, repeats: true)            testlabel.text = teststringarray[idx];          typingfield.addtarget(self, action: "textfielddidchange:", forcontrolevents: uicontrolevents.editingchanged)                                 }      override func didreceivememorywarning() {         super.didreceivememorywarning()         // dispose of resources can recreated.     }   } 

you have coded scheduledtimerwithtimeinterval in manner done objective-c. in swift done differently. instead of:

    selector:selector("setprogress") 

just use:

    selector:"setprogress"