Some timer utilities

Timers.swift

import Foundation

// I took this from: https://gist.github.com/peatiscoding/4f8699d8acd635746037b844f0730336

/**
 setTimeout()

 Shorthand method for create a delayed block to be execute on started Thread.
 
 This method returns ``Timer`` instance, so that user may execute the block
 within immediately or keep the reference for further cancelation by calling
 ``Timer.invalidate()``
 
 Example:
 let timer = setTimeout(0.3) {
 // do something
 }
 timer.invalidate()      // cancel it.
 */
func setTimeout(_ delay:TimeInterval, block:@escaping ()->Void) -> Timer {
  return Timer.scheduledTimer(
    timeInterval: delay,
    target: BlockOperation(block: block),
    selector: #selector(Operation.main),
    userInfo: nil, repeats: false
  )
}


// I wrote this

/**
 * This timer automatically syncronizes to the nearest minute
 * to save wakes/cpu cyles. Efficiency yo. Used to update the minute label.
 */
func setSynchInterval(block: @escaping () -> Void, onSet: @escaping (Timer) -> Void) {
  let minsPast = Int(Date().timeIntervalSince1970) / 60;
  let nextTick = Date(timeIntervalSince1970: TimeInterval(((minsPast * 60) + 60)))
  let nextMin = nextTick.timeIntervalSinceNow
  let _ = setTimeout(nextMin) {
    block()
    let interval = setInterval(60, block: block)
    onSet(interval)
  }
}