Question

This really leads off from my “brainstorm” last night here:
iPhone Brainstorm – CLLocation in Background – Polling every 15 minutes

When my application is active I can stop the CLLocationManager after I get a correct reading. Then after the performSelector afterDelay I can start it again, take a reading and stop it.

If though the application is but to the background when I have a timer running it never restart the CLLocationManager. I have registered for background location updates and if I do not stop the CLLocationManager it is fine but for battery I was hoping I could keep start/stopping it.

Please advise.

Thanks
James

Answer 1

Save the current time when the application enters the background.

When it becomes active again:

• If > 15 minutes has passed since the application entered the background – start CLLocationServices
• If < 15 minutes has passed, start at timer with the remaining time until CLLocationServices needs to start.