dispatch_after is limited to 10 seconds?

Question

I\'m developing an app which is running in background. Sometimes I need to tell the user that something is happenning so I play a sound a certain number of times. To do that I m

Answer 1

I suspect that chaining asynch blocks to play sounds at regular intervals is a bit of an overkill. Perhaps something simpler along the following lines would be easier to understand and maintain:

// To initiate the alarm:
[self fiBGTemps: ALARM];

- (void)fiBGTemps:(int)sender
{
    switch (sender) {
       ...
       case ALARM:
           dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void) {
                int count = 0;
                while (count < NUM_ALARM /* AND not interrupted by user? */) {
                    sleep(2);
                    AudioServicesPlaySystemSound(alarma);
                    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
                    count++;
                }
            });
            break;
        ...
    }
}