Using the code below I've been trying to get my CALayer to scale around its center - but it scales by left/top (0,0). I saw this question: Anchor Point in CALayer and have tried setting the anchorPoint - but it was [.5, .5] before I set it and setting makes no difference. Also tried setting contentsGravity.
The set up is I have a CAShapeLayer added to self.view.layer I do some drawing in it and then add the CABasicAnimation. The animation runs fine - but it scales toward the top/left - not the center of the view.
Have been tinkering with this for a few hours - it must be something simple but I'm not getting it.
shapeLayer.anchorPoint = CGPointMake(.5,.5);
shapeLayer.contentsGravity = @"center";
printf("anchorPoint %f %f\n", shapeLayer.anchorPoint.x, shapeLayer.anchorPoint.y);
CABasicAnimation *animation =
[CABasicAnimation animationWithKeyPath:@"transform.scale"];
animation.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
animation.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.1, 0.1, 1.0)];
[animation setDuration:1.0];
animation.fillMode=kCAFillModeForwards;
animation.removedOnCompletion=NO;
[shapeLayer addAnimation:animation forKey:@"zoom"];