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I’am developing an application that keep a WebService informed for device location each 5minute (for exemple) :
So when the application leave the foreground execution and enter background I have to lunch a timer who
1 – Update the device location
2 – Send the location to a web service
How can I perform this action ? Or do you know any code exemple that I can follow to achieve this design ?
Thank you for your help !
Doesn’t look like anyone gave you a solid answer, so allow me.
There is no iOS approved way of running a 5 minute (or any minute) timer in the background (unless your app is VOIP or music). What you CAN do is register your app as requiring location services in the background (edit the info.plist and add a key Required Background Modes and then add a value App registers for location updates. What this means is your locationManager:didUpdateToLocation:fromLocation: method and corresponding region monitoring/SLC methods will fire on location change, but Timers will not work at all.
The reason why is that timers require a run loop (a thread executing code) to be running and must piggy-back on that thread, but when the app is in the background even when executing code from the LocationManager, the run loop that executes the code almost always finishes before your timer would go off.
Hope this helps!