Dash line 그리기

final class PrettyView: UIView {
    func drawLine() {
        // draw dashed line 
        let bzPath = UIBezierPath()

        let startingPoint = CGPoint(x: 0, y: height / 2)
        let endingPoint = CGPoint(x: width, y: height / 2)

        bzPath.move(to: startingPoint)
        bzPath.addLine(to: endingPoint)
        bzPath.setLineDash([10, 10], count: 2, phase: 0)

        bzPath.lineWidth = 5
        bzPath.lineCapStyle = .round
        bzPath.stroke()
    }
    override func draw(_ rect: CGRect) {
        height = rect.size.height
        width = rect.size.width
        drawLine()
    }
    init(data: chartData ) {
      //some initialization
       super.init(frame: .zero)
    }

    required init?(coder aDecoder: NSCoder) {
      fatalError("init(coder:) has not been implemented")
    }
}