Wake up an iOS app using an event

Mod edit (@harrisonhjones): Reduced title length. Original title: Anyway a subscribed Particle events can wake up an iOS app in background

I am writing an iOS app that subscribed to Particle events, however I only get the events when the app in foreground, any events fed from the server during the app is suspended was delayed until the app back to active. Is it possible to wake up a suspended iOS app by a Particle event in background? Thanks in advance.

Hey, i have zero experience with ios but in Android you can do it with push notifications.
Here’s a tutorial for ios that i Found:

Hope it helps