swift - iad not appearing in ios9(xcode) -

this code working in ios 8 not in ios 9.

after upgrading ios9 , later iads not showing up. apple issue or there other way implement it.please post replies

 import uikit import iad  class viewcontroller: uiviewcontroller,adbannerviewdelegate {   @iboutlet var adsbannerview: adbannerview!  override func viewdidload() {     super.viewdidload()       adsbannerview.hidden = true      self.candisplaybannerads = true }   func bannerview(banner: adbannerview!, didfailtoreceiveadwitherror error: nserror!) {     nslog("error") }    func bannerviewwillloadad(banner: adbannerview!) {  }   func bannerviewdidloadad(banner: adbannerview!) {     adsbannerview.hidden = true }     func bannerviewactionshouldbegin(banner: adbannerview!, willleaveapplication willleave: bool) -> bool {   return true }  }