How to draw a circle using CAShapeLayer to be centered in a custom UIView in swift programmatically

Question

I am trying to draw a circular progress bar using CAShapeLayer inside a custom UIView which has been auto constraint, I don't want to draw my circle in the center of my super view but rather in the center of my custom view because I have other views on top my code below draws a circle but it is not positioned in the specified view

// Custom View
let gaugeViewHolder = UIView()
scrollView.addSubview(gaugeViewHolder)
        gaugeViewHolder.translatesAutoresizingMaskIntoConstraints = false
        gaugeViewHolder.backgroundColor = UIColor.black
        gaugeViewHolder.leadingAnchor.constraint(equalTo: motherView.leadingAnchor).isActive = true
        gaugeViewHolder.topAnchor.constraint(equalTo: defaultAccImage.bottomAnchor, constant: 70).isActive = true
        gaugeViewHolder.trailingAnchor.constraint(equalTo: motherView.trailingAnchor).isActive = true
        gaugeViewHolder.heightAnchor.constraint(equalToConstant: 200).isActive = true

//Now my circle
let shapeLayer = CAShapeLayer()
        let centerForGauge = gaugeViewHolder.center

        let circularPath = UIBezierPath(arcCenter: centerForGauge
            , radius: 80, startAngle: 0, endAngle: 2 * CGFloat.pi, clockwise: true)

        shapeLayer.path = circularPath.cgPath
        shapeLayer.strokeColor = UIColor.white.withAlphaComponent(0.20).cgColor
        shapeLayer.lineWidth = 10
        shapeLayer.fillColor = UIColor.clear.cgColor
        shapeLayer.lineCap = kCALineCapRound
        gaugeViewHolder.layer.addSublayer(shapeLayer)

Answer 1

let gaugeViewHolder = UIView()
 override func viewDidLoad() {
    super.viewDidLoad()
scrollView.addSubview(gaugeViewHolder)
    gaugeViewHolder.translatesAutoresizingMaskIntoConstraints = false
    gaugeViewHolder.backgroundColor = UIColor.black
    gaugeViewHolder.leadingAnchor.constraint(equalTo: motherView.leadingAnchor).isActive = true
    gaugeViewHolder.topAnchor.constraint(equalTo: defaultAccImage.bottomAnchor, constant: 70).isActive = true
    gaugeViewHolder.trailingAnchor.constraint(equalTo: motherView.trailingAnchor).isActive = true
    gaugeViewHolder.heightAnchor.constraint(equalToConstant: 200).isActive = true
}

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

    let shapeLayer = CAShapeLayer()
    let centerForGauge = gaugeViewHolder.center
    print("gauge width:: \(centerForGauge)")
    let circularPath = UIBezierPath(arcCenter: CGPoint(x: gaugeViewHolder.frame.size.width/2, y: gaugeViewHolder.frame.size.height/2)
        , radius: 100, startAngle: 0, endAngle: 2 * CGFloat.pi, clockwise: true)

    shapeLayer.path = circularPath.cgPath
    shapeLayer.strokeColor = UIColor.white.withAlphaComponent(0.50).cgColor
    shapeLayer.lineWidth = 10
    shapeLayer.fillColor = UIColor.clear.cgColor
    shapeLayer.lineCap = kCALineCapRound
    gaugeViewHolder.layer.addSublayer(shapeLayer)
}