CAShapeLayer Path Animation - objective-c

Question

I'm trying to animate a path change on a particular shape. I can manually change without animation by replacing this code with a simple .path [cgpath] setter. However, I want to animate the change for aesthetics.
When this code executes, there is no change to the shape what-so-ever although the log suggests the animation is complete.
for (CALayer *layer in self.view.layer.sublayers) {
if ([layer isKindOfClass:[CAShapeLayer class]]) {
CAShapeLayer *copy = (CAShapeLayer *)layer;
if ([sideChoice isEqualToString:#"datum"]) {
if ([copy.name isEqualToString:#"datumSideLayer"]) {
[CATransaction begin];
[CATransaction setCompletionBlock:^{
NSLog(#"Animation complete.");
}];
CABasicAnimation *morph = [CABasicAnimation animationWithKeyPath:#"path"];
morph.duration = 1;
morph.toValue = pathChange;
[copy addAnimation:morph forKey:nil];
[CATransaction commit];
break;
}
} else if ([sideChoice isEqualToString:#"opposite"]) {
if ([copy.name isEqualToString:#"oppositeSideLayer"]) {
}
}
}
}

Answer 1

for (CALayer *layer in self.view.layer.sublayers) {
if ([layer isKindOfClass:[CAShapeLayer class]]) {
CAShapeLayer *copy = (CAShapeLayer *)layer;
if ([sideChoice isEqualToString:#"datum"]) {
if ([copy.name isEqualToString:#"datumSideLayer"]) {
[CATransaction begin];
[CATransaction setCompletionBlock:^{
NSLog(#"Animation complete.");
}];
CABasicAnimation *morph = [CABasicAnimation animationWithKeyPath:#"path"];
morph.duration = 1;
morph.fromValue = (id) copy.path;
morph.toValue = (id) pathChange.CGPath;
[copy addAnimation:morph forKey:nil];
copy.path = [pathChange CGPath];
[CATransaction commit];
break;
}
} else if ([sideChoice isEqualToString:#"opposite"]) {
if ([copy.name isEqualToString:#"oppositeSideLayer"]) {
}
}
}
}
I didn't correctly set a fromValue nor was I pointing to a CGPath.