InteractiveMenu1.swift

// MARK: Interactive Menu {Class}
class InteractiveMenu: UIView {
   fileprivate let containerViewBottomMarginRate:CGFloat = 0.5 // 1
    fileprivate let dampingValue:CGFloat = 1.5 // 2a
    fileprivate let responseValue:CGFloat = 5.5 // 2b 
    
    fileprivate let viewBlurBackground:UIVisualEffectView = {
        let blurEffect = UIBlurEffect(style: UIBlurEffect.Style.dark)
        let blurView = UIVisualEffectView(effect: blurEffect)
        blurView.translatesAutoresizingMaskIntoConstraints = true
        blurView.alpha = 0.8
        return blurView
    }()
    
    fileprivate let containerView:UIView = {
           let view = UIView(frame: CGRect.zero)
           view.translatesAutoresizingMaskIntoConstraints = true
           view.backgroundColor = #colorLiteral(red: 0.06666666667, green: 0.07058823529, blue: 0.07450980392, alpha: 1)
           view.layer.cornerRadius = 16
           view.layer.masksToBounds = true
           return view
       }()
       
    fileprivate var configuration:InteractiveMenuConfiguration = InteractiveMenuConfiguration() // 3 
    fileprivate var dataSource:InteractiveMenuDataSource!
    fileprivate var delegate:InteractiveMenuDelegate?
    fileprivate var frameClosedPosition:CGRect = CGRect.zero //4a
    fileprivate var frameOpenPosition:CGRect = CGRect.zero // 4b
    fileprivate var animator:UIViewPropertyAnimator = UIViewPropertyAnimator() // 5
    fileprivate var viewInContainer:UIView!  
    fileprivate var scrollableContentView:UIScrollView? // 6
    fileprivate var panGestureContainerView:UIPanGestureRecognizer!
    fileprivate var panGestureScrollableContent:UIPanGestureRecognizer?
    
    fileprivate var totalHeightContainerView:CGFloat {
        return self.configuration.containerViewHeight + self.configuration.containerViewHeight * self.containerViewBottomMarginRate
    }
    
     init(embedIn view:UIView , dataSource : InteractiveMenuDataSource , delegate:InteractiveMenuDelegate? , configuration:InteractiveMenuConfiguration) {
        super.init(frame: CGRect.zero)
        self.dataSource = dataSource
        self.configuration = configuration
        self.delegate = delegate
        view.addSubview(self)
        self.setUpUI()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}