如何播放警报声并显示自定义视图而不仅仅是通知？

I'm working on an alarm clock application for iOS 4.x. The other alarm clock applications that I've seen are able to present the user with something other than a local notification (i.e., a custom view) and are able to play a sound file. I've been looking into how that's done and have only found this solution:I'm working on an alarm clock application for i