스위프트 Swift 타이머 간단 구현 Timer

코드 작성

import UIKit

class ViewController: UIViewController {
    
    var timer: Timer?
    var time = 0
    let timeLabel: UILabel = {
        let label = UILabel()
        label.font = UIFont.systemFont(ofSize: 48)
        label.textAlignment = .center
        label.text = "00:00"
        return label
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(timeLabel)
        timeLabel.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            timeLabel.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            timeLabel.centerYAnchor.constraint(equalTo: view.centerYAnchor)
        ])
        
        startTimer()
    }
    
    func startTimer() {
        timer = Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(updateTimer), userInfo: nil, repeats: true)
    }
    
    @objc func updateTimer() {
        time += 1
        let minutes = time / 60
        let seconds = time % 60
        timeLabel.text = String(format: "%02d:%02d", minutes, seconds)
    }
    
    deinit {
        timer?.invalidate()
    }
}