swiftnstimeinterval

How to convert DispatchTimeInterval to NSTimeInterval (or Double)?

I need to subtract a DispatchTimeInterval from an NSTimeInterval (or Double).

Is there a standard way to convert a DispatchTimeInterval to an NSTimeInterval?

Solution

  • A very neat and simple solution is this one (no need for switch statements):

    extension DispatchTimeInterval {
  var nanoseconds: UInt64 {
    let now = DispatchTime.now()
    let later = now.advanced(by: self)
    return later.uptimeNanoseconds - now.uptimeNanoseconds
  }

  var timeInterval: TimeInterval {
    return Double(nanoseconds) / Double(NSEC_PER_SEC)
  }
}