Re: Adding 30 minutes to an NSDate
Re: Adding 30 minutes to an NSDate
- Subject: Re: Adding 30 minutes to an NSDate
- From: j o a r <email@hidden>
- Date: Wed, 20 Jul 2005 11:02:21 +0200
On 20 jul 2005, at 10.54, Nicko van Someren wrote:
You don't want to just fire after 60 mins from when your last timer
function was triggered. NSTimers can fire late, especially if the
machine is asleep at the time that the timer was supposed to fire,
so firing at Now+60mins will tend to drift; if you want the timer
to go off on the hour where possible this will be bad.
You would of course re-schedule your timers whenever you wake up from
sleep. That's something you always need to do when you use NSTimer to
fire at an absolute time, and not really particular to how you choose
to tackle this problem.
j o a r
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