How to convert an NSTimeInterval (seconds) into minutes

Question

I\'ve got an amount of seconds that passed from a certain event. It\'s stored in a NSTimeInterval data type.

I want to convert it into

Answer 1

How I did this in Swift (including the string formatting to show it as "01:23"):

let totalSeconds: Double = someTimeInterval
let minutes = Int(floor(totalSeconds / 60))
let seconds = Int(round(totalSeconds % 60))        
let timeString = String(format: "%02d:%02d", minutes, seconds)
NSLog(timeString)