I'm trying to make countdown timer(user can adjust time) with 30 sec interval function.
It's my first coding!
I've done building interface....so on.
I need some guide with building timer.
The function is like this.
User can set time with +30sec, +1 min, +5min button
total time have to display like this. 00:00
Another '30sec count-down timer' below total time
'30sec count-down' repeats until total time end.(Like tabata interval timer)
That's it...
A little hint can help me a lot.
Thank you!
Timer.scheduledTimer(withTimeInterval: 30, repeats: true) { timer in
foo()
}
Use this timer initializer.
Related
I'm working on a timer that needs to do some calculations and run some functions at a certain interval. I'm trying to keep the interval as big as possible, but I need it to be kind of fine grained.
Here is the periodic timer with some of the stuff that needs to happen.
So as you can see, every second (the milliseconds passed % 1000 == 0) it will do some stuff if some conditions are met. But also every 10 milliseconds I need to check some stuff.
It seems this is a bit too much, and after running the timer for 2 minutes it already drags 1 second behind. I guess I'm approaching this the wrong way. Could/should I somehow put all that logic in a function that just runs async so the timer can just keep going.
It's not the end of the world if the timer display drags for a few milliseconds every now and then, if it catches up later. But now the whole timer just drags.
_timer = Timer.periodic(Duration(milliseconds: 10), (timer) {
passedMilliseconds = passedMilliseconds + 10;
// METRONOME BEEP AND BLINK
if (passedMilliseconds % currentTimerSettingsObject.milliSecondDivider == 0) {
_playMetronomeBeep();
_startMetronomeBlink();
}
// ONE SECOND
if (passedMilliseconds % 1000 == 0) {
secondsDuration--;
// COUNTDOWN
if (secondsDuration < currentTimerSettingsObject.countDown + 1) {
_player.play('sounds/beep.mp3');
}
// SET COUNTDOWN START VALUES
if (secondsDuration == currentTimerSettingsObject.countDown) {
isCountdown = true;
}
notifyListeners();
}
// TIME IS UP
if (secondsDuration < 0) {
switchToNextTimer();
notifyListeners();
}
});
}
You cannot rely on a timer to deliver events exactly on time. You need to use a more exact method than simply incrementing a counter by 10 on every tick. One example would be to start a Stopwatch before the timer and then (knowing that your ticks will only be on approximately 10ms intervals) read stopwatch.elapsedMilliseconds and base your decisions on that.
You will need to change your logic a bit. For example, you want to know when you pass a 1 second boundary. Previously, with your exact increments of 10 you knew you would eventually reach a round 1000. Now, you might see 995 followed by 1006, and need to deduce that you've crossed a second boundary to run your per second logic.
I have a sprite "shooting" more sprites every x amount of seconds using a Timer:
self.shootingEngine = Timer.scheduledTimer(timeInterval: (Double(60)/Double(self.ratePerMinute)), target: self, selector: #selector(ShootingEnemy.shoot), userInfo: nil, repeats: true)
So the time interval is defined by:
(Double(60)/Double(self.ratePerMinute)) // Let's say it is 2 seconds.
The time interval, which in this example would be 2 seconds. It is triggering the shoot() method every 2 seconds. Now, I want to figure out how to get the time remaining until the Timer runs the shoot() method again. For instance, I want to know there are 0.74 seconds remaining until the next shoot()
I was thinking of using this:
NSDate().timeIntervalSince1970 * 1000
And saving the time into a variable and then just finding the difference with the current time. However, I first wanted to check if there is a simpler way to avoid having to store another instance variable.
Do
let timeRemaining = shootingEngine.fireDate.timeIntervalSince(Date())
Let me know if you have any other questions. Good luck!
I have set a NSTimer.scheduledTimerWithTimeInterval method which has an interval every 20 minutes. I want to be able to find out how much time is left when the the app goes into background mode. How do I find out how much time is left from the interval?
Thanks
You have access to a NSTimer's fireDate, which tells you when the timer is going to fire again.
The difference between now and the fireDate is an interval you can calculate using NSDate's timeIntervalSinceDate API.
E.G. something like:
let fireDate = yourTimer.fireDate
let nowDate = NSDate()
let remainingTimeInterval = nowDate.timeIntervalSinceDate(fireDate)
When using the Solution of #Michael Dautermann with normal Swift type Timer and Date I have noticed, that his solution will give you a negative value e.g.:
let fireDate = yourTimer.fireDate
let nowDate = Date()
let remainingTimeInterval = nowDate.timeIntervalSinceDate(fireDate)
//above value is negative e.g. when the timers interval was 2 sec. and you
//check it after 0.5 secs this was -1,5 sec.
When you insert a negative value in the Timer.scheduledTimer(timeInterval:,target:,selector:,userInfo:,repeats:) function it would lead to a timer set to 0.1 milliseconds as the Documentation of the Timer mentions it.
So in my case I had to use the negative value of the nowDate.timeIntervalSinceDate(fireDate) result: -nowDate.timeIntervalSinceDate(fireDate)
I am trying to test the firing of a rule based on a cron timer using the pseudo clock in Drools Fusion 5.5. I want the rule to fire everyday at 1am:
rule "CALCULATING DATE FOR NEXT DAY"
timer (cron:00 00 01 * * ?)
no-loop
when
$summary: FxSummary(sameDayCcyFlag == false)
then
BusinessDayUtil b = new BusinessDayUtil();
modify($summary) {
setSettlementDate(b);
}
end
I then do the following in my test case:
PseudoClockScheduler timeService = ( PseudoClockScheduler ) ksession.getSessionClock();
DateFormat df = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ss.SSSZ" );
Date date = df.parse( "2014-01-16T01:00:00.000-0000" );
Summary sum = new Summary("YEN").setSameDayCcyFlag(false);
ksession.fireAllRules();
timeService.advanceTime( date.getTime(), TimeUnit.MILLISECONDS );
ksession.fireAllRules();
It doesn't seem to do anything...no indication that the timer fired or anything. I've also tried to insert a date at say 12:59:50 and advanced the clock 10sec. Also, fireUntilHalt to have the engine running, etc. Nothing seems to work. Am I using this correctly? Does the pseudo clock work with timers? Also, does it fire "missed" timers if I advance the clock past a timer that was supposed to fire?
Think about how cron can be implemented. The basic function is timer, and this works like ye olde kitchen's egg-timer: at one point in time you wind it up, and then it'll ring 4 or 5 minutes later. Thus, for the next cron ring of the bell, the Cook will have to look at the clock and calculate the interval to the indicated point in time.
You'll have to let the Cook look at the clock some time before the next 1:00am, say, around midnight. The code goes something like this, with advance() overloaded with Date and long to advance the pseudo-clock:
date = df.parse( "2014-01-15T00:00:00.000-0000" ); // Note: midnight
advance( date );
kSession.fireAllRules(); // (Ah, ring in one hour!)
advance( 1000*60*60 );
kSession.fireAllRules(); // Ring!
advance( 24*1000*60*60 );
kSession.fireAllRules(); // Ring!
The postman only rings twice ;-)
I am still new to cocos2d and was wondering if any of you guys can help me make a score timer. I seen some questions like this but looks like it is for a way older version of cocos2d. I want the timer to start at zero and go up in mins and seconds. Really appreciate any help or advice I get.
Start a NSTimer that runs every second and calls a method that updates the timer.
Define an integer called seconds and another called minutes in the header.
-(void)updateTheTime {
seconds++;
if (seconds == 60) {
seconds = 0;
minutes++;
}
label.text = [NSString stringWithFormat:#"%i:%i", minutes, seconds];
}