How do I keep the user's iPhone's display on?

Question

So, I was looking for a way to keep the user\'s iPhone display on for a clock app. I found [UIApplication sharedApplication].idleTimerDisabled = YES; but that k

Answer 1

Here's my solution, using XCode 6.2.

iPhone - phone goes to sleep even if idleTimerDisabled is YES

Basically, even now, in 2015, the only way to safely make sure that the device doesn't go to sleep is to repeatedly call a piece of code to keep the device awake.

-(void)callEveryTwentySeconds
{
    //  DON'T let the device go to sleep during our sync
    [[UIApplication sharedApplication] setIdleTimerDisabled:NO];
    [[UIApplication sharedApplication] setIdleTimerDisabled:YES];
}

Answer 2

Alter the idleTimerDisabled property whenever your app changes its active state - if you're going to be backgrounded, re-enable the timer, and when you regain control, disable the timer again.