Digital-Clock

• UI/UX : I use font Digital, background search google image. // So bad :(

###Timer.

• Timer.Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(ViewController.updateTime), userInfo: nil, repeats: true)
  • timeInterval: number sec will repeat once
  • target: target /self : screen iphone
  • selector: #selector(func) : func repeat
  • repeats: true // after timeInterval. Is it repeat again? true is yes.

GET time

• let date  = Date() // get infomation date now
  let calendar = NSCalendar.current 
  let requestedComponents :NSCalendar.Unit = [  // type date
      NSCalendar.Unit.hour, 
      NSCalendar.Unit.minute,
      NSCalendar.Unit.second,
      NSCalendar.Unit.day,
      NSCalendar.Unit.month,
      NSCalendar.Unit.year,
      NSCalendar.Unit.weekOfYear,
  ]
  
  let components = (calendar as NSCalendar).components(requestedComponents, from: date)