|| Swift || Create a UIBezierPath shaped like an arrow with given dimensions

arrowUIBezierPath.swift

extension UIBezierPath {
    
    // creates an arrow shaped path with middle of base as start point and pointed end as end point
    class func arrowPath(tailLength: CGFloat, tailWidth: CGFloat, headWidth: CGFloat) -> UIBezierPath {
        
        let midY: CGFloat = tailWidth / 2
        
        var polygonPath = UIBezierPath()
        polygonPath.moveToPoint(CGPointMake(0, 0))
        polygonPath.addLineToPoint(CGPointMake( 0, -midY))
        polygonPath.addLineToPoint(CGPointMake( tailLength, -midY))
        polygonPath.addLineToPoint(CGPointMake( tailLength, -headWidth))
        polygonPath.addLineToPoint(CGPointMake( tailLength + headWidth, 0))
        polygonPath.addLineToPoint(CGPointMake( tailLength, headWidth))
        polygonPath.addLineToPoint(CGPointMake( tailLength, midY))
        polygonPath.addLineToPoint(CGPointMake( 0, midY))
        
        polygonPath.closePath()
        
        
        return polygonPath
    }
}