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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)