     
     private var trackView = UIView(frame: .zero)
     
-    @IBInspectable public var trackTintColor = UIColor.lightGray {
+    @IBInspectable public var trackTintColor: UIColor = UIColor.lightGray {
         didSet {
             trackView.backgroundColor = trackTintColor
         }


@IBDesignable
public class RoundCornerProgressView: UIView {
    
    @IBInspectable public var trackRoundCorners: UIRectCorner = [.topRight, .bottomRight, .topLeft, .bottomLeft] {
        didSet {

            }
            progressView.frame = CGRect(origin: progressView.frame.origin, size: CGSize(width: frame.width * progress, height: frame.height))
            progressView.roundCorner(roundingCorners: progressRoundCorners, cornerRadius: CGSize(width: frame.size.height / 2, height: frame.size.height / 2))
            progressLabel.text = String(format: "%d%%", Int(progress * 100))
        }
    }
    
