[Solved] How to connect a seconds timer to a minutes timer in Swift? [closed]

Question

I would not use separate timers. Have a seconds timer that fires once a second.
It sounds like you want a count-down timer. So…

Record the time when the timer starts using code like this:

let secondsToEnd = 60*5
let startInterval =  NSDate.timeIntervalSinceReferenceDate()
let endInterval = startInterval + Double(secondsToEnd)

Then in your timer code:

let remainingSeconds = Int(endInterval - NSDate.timeIntervalSinceReferenceDate())
let minutes = remainingSeconds/60
let seconds = remainingSeconds%60

Display the minutes and seconds values however you need to.

NSTimers will sometimes miss a firing if the app is busy when the timer should have gone off, and are not super-accurate. The above code will always calculate the real remaining amount of time, regardless of the timer you use to display that info and any inaccuracy in that timer.

Accepted Answer

I would not use separate timers. Have a seconds timer that fires once a second.
It sounds like you want a count-down timer. So…

Record the time when the timer starts using code like this:

let secondsToEnd = 60*5
let startInterval =  NSDate.timeIntervalSinceReferenceDate()
let endInterval = startInterval + Double(secondsToEnd)

Then in your timer code:

let remainingSeconds = Int(endInterval - NSDate.timeIntervalSinceReferenceDate())
let minutes = remainingSeconds/60
let seconds = remainingSeconds%60

Display the minutes and seconds values however you need to.

NSTimers will sometimes miss a firing if the app is busy when the timer should have gone off, and are not super-accurate. The above code will always calculate the real remaining amount of time, regardless of the timer you use to display that info and any inaccuracy in that timer.