Create a CGPath from an NSBezierPath in Swift. Great for CALayers for example.

gistfile1.swift

// Adapted from Cocoa Drawing Guide's "Create a CGPathRef fram an NSBezierPath Object"
func CGPathFromNSBezierPath(nsPath: NSBezierPath) -> CGPath! {
    
    if nsPath.elementCount == 0 {
        return nil
    }
    
    let path = CGPathCreateMutable()
    var didClosePath = false
    
    for i in 0..nsPath.elementCount {
        var points = NSPoint[](count: 3, repeatedValue: NSZeroPoint)
        
        switch nsPath.elementAtIndex(i, associatedPoints: &points) {
        case .MoveToBezierPathElement:CGPathMoveToPoint(path, nil, points[0].x, points[0].y)
        case .LineToBezierPathElement:CGPathAddLineToPoint(path, nil, points[0].x, points[0].y)
        case .CurveToBezierPathElement:CGPathAddCurveToPoint(path, nil, points[0].x, points[0].y, points[1].x, points[1].y, points[2].x, points[2].y)
        case .ClosePathBezierPathElement:CGPathCloseSubpath(path)
            didClosePath = true
        }
    }
    
    if !didClosePath {
        CGPathCloseSubpath(path)
    }
    
    return CGPathCreateCopy(path)
}