conversion from NSTimeInterval to hour,minutes,seconds,milliseconds in swift

Question

My code is here:

func stringFromTimeInterval(interval:NSTimeInterval) -> NSString {      var ti = NSInteger(interval)     var ms = ti * 1000     var seconds = ti % 60     var minutes = (ti / 60) % 60     var hours = (ti / 3600)        return NSString(format: "%0.2d:%0.2d:%0.2d",hours,minutes,seconds,ms) } 

in output the milliseconds give wrong result.Please give an idea how to find milliseconds correctly.

Answer 1

Swift supports remainder calculations on floating-point numbers, so we can use % 1.

var ms = Int((interval % 1) * 1000) 

as in:

func stringFromTimeInterval(interval: TimeInterval) -> NSString {    let ti = NSInteger(interval)    let ms = Int((interval % 1) * 1000)    let seconds = ti % 60   let minutes = (ti / 60) % 60   let hours = (ti / 3600)    return NSString(format: "%0.2d:%0.2d:%0.2d.%0.3d",hours,minutes,seconds,ms) } 

result:

stringFromTimeInterval(12345.67)                   "03:25:45.670" 

Swift 4:

extension TimeInterval{          func stringFromTimeInterval() -> String {              let time = NSInteger(self)              let ms = Int((self.truncatingRemainder(dividingBy: 1)) * 1000)             let seconds = time % 60             let minutes = (time / 60) % 60             let hours = (time / 3600)              return String(format: "%0.2d:%0.2d:%0.2d.%0.3d",hours,minutes,seconds,ms)          }     } 

Use:

self.timeLabel.text = player.duration.stringFromTimeInterval()