Can External Accessory be run in background for iPhone?

Sorry if it is such a dumb question or if I'm not ninja google-ing enough. I just need the answer quick.

I have an external accessory which gets data from ANT+ sensors. My question is, would开发者_Python百科 it be possible that my application using the external accessory continue to run in the background, or at least send push notifications?

Thanks and feel free to downvote because I think it's very lazy of me to ask here.

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According to the Apple specs your application won't receive events immediately while in the back ground but all events should be hold in a queue and sent when back foreground. Depending on the frequency your device is running and the elapsed time while staying in the background you should be prepared to get a bunch of events.

See External Accessory Programming Topics: Monitoring Accessory-Related Events

and Multitasking Support for more information.