Question

Actually I have Some Issues with my App. I have a counter which decrease each 0.0001 second thanks to my NSTimer. The counter starts at 999 and my timer calls a method who only decrease my counter by 1.

SO, here’s my problem: When I execute my app on the simulator it run just fine but as soon as I test it on my iPad 2 the counter is terribly low …

The iPad 2 is maybe not able to calculate as fast as I would so is anyone here would have an alternative ?

Answer 1

I don’t think timers were designed to run at that speed… You can try using a background thread instead…

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{

    while (true) {

        // Wait for delay
        usleep(100);

        // If counter is displayed on the UI
        dispatch_async(dispatch_get_main_queue(), ^{

            // Increment
            ...

        }

        // If not on the UI, just increment here
        ...

    }

});