IPhone tracking distance in background

Question

I was wondering, before exploring the entire iPhone development stack, is it even possible to write an application in iOS 4 that can sit in the background and tell the user when certain geolocation events have occurred? For example, tell jogger when he has traveled 4 miles, but without having to always open the application?

Thank!

Answer 1

Yes, this is entirely possible on iOS 4.x devices. (This is one of the selling points - see the “Background Layout” section in “What's New in iOS4 Ads.”)

, CLLocationManager " iOS.