ALSdk.shared()!.adService.loadNextAd(ALAdSize.sizeInterstitial(), andNotify: self)

ALInterstitialAd.shared().adDisplayDelegate = self
ALInterstitialAd.shared().adVideoPlaybackDelegate = self

if let ad = self.ad
{
    ALInterstitialAd.shared().showOver(UIApplication.sharedApplication().keyWindow!, andRender: ad)
}