gestureRecognizer.swift

@objc func twoFingersGestureRecognizer(sender: TwoFingersGestureRecognizer) {
    if sender.state == .ended {
        
        if sender.fingersDirection == .moveDown && !self.settings.isDarkMode {
            self.settings?.isDarkMode = true
            self.settingsHandler.save(settings: self.settings)
            
            player.play(name: "switch-on")
            NotificationCenter.default.post(name: .darkModeEnabled, object: nil)
        }
        
        if sender.fingersDirection == .moveUp && self.settings.isDarkMode {
            self.settings?.isDarkMode = false
            self.settingsHandler.save(settings: self.settings)
            
            player.play(name: "switch-off")
            NotificationCenter.default.post(name: .darkModeDisabled, object: nil)
        }
    }
}