FaceView2.swift

class FaceView: UIView {
    
    
    //MARK 
    //Don't type infer
    @IBInspectable
    var scale: CGFloat = 0.9 { didSet{setNeedsDisplay()} }
    
    @IBInspectable
    var eyesOpen: Bool = true { didSet{setNeedsDisplay()} }
    
    @IBInspectable
    var mouthCurvature: Double = 1.0 { didSet{setNeedsDisplay()} }
    
    @IBInspectable
    var lineWidth: CGFloat = 5.0 { didSet{setNeedsDisplay()} }
    
    @IBInspectable
    var color: UIColor = UIColor.blue { didSet{setNeedsDisplay()} }
    
    
    //MARK
    func changeScale(byReactingTo pinchRecognizer: UIPinchGestureRecognizer)
    {
        switch pinchRecognizer.state {
        case .changed, .ended:
            scale *= pinchRecognizer.scale
            pinchRecognizer.scale = 1
        default:
            break
            
        }
    }