The GTAlertView class for iOS, provides a way for using the UIAlertView with a completion handler block, instead of delegate methods. With it, initialiazing and showing the alert view, as well as handling the tapped buttons are implemented all together in one place. Therefore, there is no more need to adopt the UIAlertViewDelegate protocol and implement delegate methods. Further than that, two more features are provided: To show a single message with a one button using a class method (no object initialization required), and a convenient way to present a buttonless alert view.

You can find it here:

https://github.com/gabrieltheodoropoulos/iOS-CustomizedAlertView