Question

My application supports the GPS and it runs both in foreground and background. I have started a timer , which is working perfectly unless the device is locked.
I want the timer to keep on running even when the device is locked.

Can anyone tell me how this can be done ?

Answer 1

Whichever way you start a timer, the default run mode is like below:

     Timer *timer = [NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(run) userInfo:nil repeats:YES];

     [[ NSRunLoop currentRunLoop ] addTimer:timer forMode:NSDefaultRunLoopMode ];

using NSDefaultRunLoopMode. You want more flexibility, so change forMode to take NSRunLoopCommonModes instead and you should be fine.