如何在Swift中用虚线创建标尺

Question

我想创建如下图所示的内容 我如何用Swhed Core Graphics和虚线创建它 我也想以圆形形式创造这种气罐表盘或车速表。

我目前的代码在

之下

    let dashes: [CGFloat] = [2, 2]

    let dashedLine = UIBezierPath()

    dashedLine.move(to: CGPoint(x: 0, y: rect.height/2))

    dashedLine.addLine(to: CGPoint(x: rect.width, y: rect.height/2))

    dashedLine.setLineDash(dashes, count: dashes.count, phase: 0)

    dashedLine.lineWidth = 5

    UIColor.black.setStroke()

    dashedLine.stroke()