小编Mar*_*nto的帖子

我在我的类中有这两个函数，它们扩展了 CAShapeLayer，但是每次我绘制路径时都无法得到带有圆形端盖的弧。它看起来总是这样的图片：

我已经尝试使用 kCALineCapRound 没有成功。有任何想法吗？

self.lineShape.lineCap = kCALineCapRound;

self.lineShape.lineJoin = kCALineJoinRound;

  private func mask() {
    let maskLayer = CAShapeLayer()
    maskLayer.bounds = self.bounds
    let ovalRect = self.hollowRect
    let path =  UIBezierPath(ovalInRect: ovalRect)
    path.appendPath(UIBezierPath(rect: maskLayer.bounds))
    maskLayer.path = path.CGPath
    maskLayer.lineShape.lineCap = kCALineCapRound;
    maskLayer.lineShape.lineJoin = kCALineJoinRound;
    maskLayer.position = self.currentCenter
    maskLayer.fillRule = kCAFillRuleEvenOdd
    self.mask = maskLayer
  }

  private func drawTrack(ctx: CGContext) {
    let adjustDegree = Math.adjustDegree(self.setting.startAngle, degree: self.degree)
    let centerX = self.currentCenter.x
    let centerY = self.currentCenter.y
    let radius = min(centerX, centerY)
    CGContextSetFillColorWithColor(ctx, self.setting.trackingColor.CGColor)
    CGContextSetLineCap(ctx, CGLineCap.Round) …