结果是这样做的： func drawLineFromPoint(start : CGPoint, toPoint end:CGPoint, ofColor lineColor: UIColor, inView view:UIView) { //design the path var path = UIBezierPath() path.moveToPoint(start) path.addLineToPoint(end) //design path in layer var shapeLayer = CAShapeLayer() shapeLayer.path = path.CGPath shapeLayer.strokeColor = lineColor.CGColor shapeLayer.lineWidth = 1.0 view.layer.addSublayer(shapeLayer) }... 展开详请