Swift - Brightness

Brightness

import UIKit

class BrightnessVC: UIViewController {

    var timer: Timer?

    override func viewDidLoad() {
        super.viewDidLoad()
        
        timer = Timer.scheduledTimer(withTimeInterval: 0.5, repeats: true) { (t) in
            self.brightness()
        }
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        timer?.invalidate()
    }

    func brightness() {
        let currentBrightness = UIScreen.main.brightness
        print( "currentBrightness: \(currentBrightness)" )
        
        self.view.backgroundColor = UIColor(red: 0, green: 1, blue: 0, alpha: currentBrightness)
    }

}