Rotate CGPath without changing its position

Question

I want to rotate a CGPath, I\'m using the following code:

CGAffineTransform transform = CGAffineTransformMakeRotation(angleInRadians);
CGPathRef         


        

Answer 1

A Swift 5 version:

func rotate(path: UIBezierPath, degree: CGFloat) {
    let bounds: CGRect = path.cgPath.boundingBox
    let center = CGPoint(x: bounds.midX, y: bounds.midY)

    let radians = degree / 180.0 * .pi
    var transform: CGAffineTransform = .identity
    transform = transform.translatedBy(x: center.x, y: center.y)
    transform = transform.rotated(by: radians)
    transform = transform.translatedBy(x: -center.x, y: -center.y)
    path.apply(transform)
}