斯威夫特 - 如何获得圆形帽上CAShapeLayer或UIBezierPath（ovalInRect：ovalRect）

我有这2个功能波纹管在我的课延伸CAShapeLayer，但我不能得到与圆形端的圆弧帽每次我绘制的路径时。它看起来总是像这样的画面：斯威夫特 - 如何获得圆形帽上CAShapeLayer或UIBezierPath（ovalInRect：ovalRect）

我已经使用kCALineCapRound没有成功尝试。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) 
    CGContextBeginPath(ctx) 
    CGContextMoveToPoint(ctx, centerX, centerY) 
    CGContextAddArc(ctx, centerX, centerY, radius, 
     CGFloat(Math.degreesToRadians(self.setting.startAngle)), 
     CGFloat(Math.degreesToRadians(adjustDegree)), 0) 
    CGContextClosePath(ctx); 
    CGContextFillPath(ctx); 
    }

来源

2016-07-31 Marco Nascimento