task with action in background service

I've been searching an googleing over one hour now and 开发者_如何转开发I'm not really sure of it's legal and possible to add some tasks in an background service that triggers an action ( and bring the app to the foreground ).

With tasks i mean that the background service is doing something on an indicated time. I know its possible to bring up the IOS alert with the notifications ect... But an simple notifiction is not good enough.

Actually I wanna play an video, and if this is not possible maybe the audio ? Since bringing the app to the foreground is not possible, or is it?

What are the options?

---

It's not acceptable to take away the user from what they are doing, this applies to iOS since it's a one-thing at a time OS. How would you feel if an application switched to itself while you're playing, chatting or half-way reading an article?

Apple doesn't allow it, you should stick to the Notifications, and if the user truly wants to see/hear the video/audio, then he will go to your app.