I am having an application on iTunes store which displays some UILabel and UIWebView on UIAlertView. According to session video,
AddSubview is not possible from iOS 7.
The only way is to create a custom UIView subclass which can act as UIAlertView. I could find out few components on Github.
The linked one Custom Alert seems to work well. By putting proper version check one can identify to go for native UIAlertView or CustomAlertView.