func resetIdleTimer()
{
if (idleTimer == nil)
{
idleTimer = NSTimer.scheduledTimerWithTimeInterval(kMaxIdleTimeSeconds, target: self, selector: "idleTimerExceeded:", userInfo: nil, repeats: false)
}
else
{
if (fabs(idleTimer.fireDate.timeIntervalSinceNow) < kMaxIdleTimeSeconds-1.0)
{
idleTimer.fireDate = NSDate(timeIntervalSinceNow: kMaxIdleTimeSeconds)
}
}
}
func idleTimerExceeded(sender: AnyObject)
{
idleTimer = nil
//do something when timer fires
}
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