rotate UIBezierPath

- (void)rotatePath:(UIBezierPath *)path degree:(CGFloat)degree {
    CGRect bounds = CGPathGetBoundingBox(path.CGPath);
    CGPoint center = CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds));
    
    CGFloat radians = (degree / 180.0f * M_PI);
    CGAffineTransform transform = CGAffineTransformIdentity;
    transform = CGAffineTransformTranslate(transform, center.x, center.y);
    transform = CGAffineTransformRotate(transform, radians);
    transform = CGAffineTransformTranslate(transform, -center.x, -center.y);
    [path applyTransform:transform];
}

The swift version:

func rotatePath(path: UIBazierPath, angle: CGFloat) {
            let bounds = path.cgPath.boundingBox
            let center = CGPoint(x: bounds.midX, y: bounds.midY)
            
            var transform = CGAffineTransform.identity
            transform = transform.translatedBy(x: center.x, y: center.y)
            transform = transform.rotated(by: angle)
            transform = transform.translatedBy(x: -center.x, y: -center.y)
            path.apply(transform)
}