如何使用Swift從UIBezierPath創建虛線SKShapeNode？

Question

我發現的所有解釋似乎都說相同的話。 我不知道為什么這不起作用。

var linePath = UIBezierPath()
linePath.move(to: CGPoint(x: 50, y: 50))
linePath.addLine(to: CGPoint(x: 100, y: 100))

var pattern : [CGFloat] = [10.0, 10.0]
linePath.setLineDash(pattern, count: pattern.count, phase: 0)
linePath.lineWidth = 10
linePath.lineCapStyle = .round

let shape = SKShapeNode()
shape.path = linePath.cgPath
shape.strokeColor = UIColor.white

self.addChild(shape)

這段代碼成功繪制了一條線，但是shape不繼承linePath的虛線屬性，包括寬度。 有任何想法嗎？

Answer 1

let linePath = UIBezierPath()
linePath.move(to: CGPoint(x: 50, y: 50))
linePath.addLine(to: CGPoint(x: 100, y: 100))

var pattern: [CGFloat] = [10.0, 10.0]
let dashed = CGPathCreateCopyByDashingPath (linePath.CGPath, nil, 0, pattern, 2)

var shape = SKShapeNode(path: dashed)
shape.strokeColor = UIColor.white

self.addChild(shape)

注意：在Swift 3中， CGPathCreateCopyByDashingPath已由path.copy(dashingWithPhase:lengths:)取代。

例如

let dashed = SKShapeNode(path: linePath.cgPath.copy(dashingWithPhase: 2, lengths: pattern))