import UIFadeLabel

    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.view.addSubview(fadeLabel)
        fadeLabel.text = "He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish.\nAll happy families are alike; each unhappy family is unhappy in its own way.\nAll children, except one, grow up. That one remains a child. It is Peter Pan."
    }

    lazy var fadeLabel: UIFadeLabel = {
        let label = UIFadeLabel()
        label.frame = CGRect(x: 20, y: 0, width: UIScreen.main.bounds.width - 40, height: UIScreen.main.bounds.height)
        label.font = UIFont.systemFont(ofSize: 20, weight: .medium)
        label.numberOfLines = 0
        label.isFadeNeeded = true
        label.appearDuration = 1
        label.disappearDuration = 1
        label.textColor = UIColor(red: CGFloat(arc4random_uniform(256)) / 255.0 , green: CGFloat(arc4random_uniform(256)) / 255.0, blue: CGFloat(arc4random_uniform(256)) / 255.0, alpha: 1.0)
        label.isUserInteractionEnabled = true
        label.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tap)))
        return label
    }()

    // fade in duration
    @IBInspectable public var appearDuration: CFTimeInterval = 1.0
    // fade out duration
    @IBInspectable public var disappearDuration: CFTimeInterval = 1.0
    // need fade or not
    @IBInspectable public var isFadeNeeded = true