CABasicAnimation - transform scale keep in center

Question

Trying to animatie an ellipse masked on a UIView to be scale transformed remaining in the center position.

I have found CALayer - CABasicAnimation not scaling around cen

Answer 1

I seem to have fixed this with a second animation on the position key. Is this correct or is there a better way of doing this?

CABasicAnimation *animation2 = [CABasicAnimation animationWithKeyPath:@"position"];

animation2.duration = 1.0f;

animation2.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

animation2.fromValue = [NSValue valueWithCGPoint:CGPointMake((self.view.frame.size.width/2), (self.view.frame.size.height/2))];
animation2.toValue = [NSValue valueWithCGPoint:CGPointMake((self.view.frame.size.width/2), (self.view.frame.size.height/2))];

[toBeMask.layer.mask addAnimation:animation2 forKey:@"animateMask2"];