CATransform3D Key Paths with #keyPath

Question

Is it possible to use enhanced key path (as described here) for a CATransform3D property in Swift 3 with new #keyPath keyword?

In other words to replace

let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")

with something like

let scaleAnimation = CABasicAnimation(keyPath:  #keyPath(CALayer.transform.???))

Answer 1

CAValueFunction should be used.

let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")

->

let scaleAnimation = CABasicAnimation(keyPath: #keyPath(CALayer.transform))
scaleAnimation.valueFunction = CAValueFunction(name: kCAValueFunctionScale)

and

let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation")

->

let rotationAnimation = CABasicAnimation(keyPath: #keyPath(CALayer.transform))
rotationAnimation.valueFunction = CAValueFunction(name: kCAValueFunctionRotateZ)

etc.

• rotation.x -> kCAValueFunctionRotateX
• rotation.y -> kCAValueFunctionRotateY
• rotation.z -> kCAValueFunctionRotateZ
• rotation -> kCAValueFunctionRotateZ
• scale.x -> kCAValueFunctionScaleX
• scale.y -> kCAValueFunctionScaleY
• scale.z -> kCAValueFunctionScaleZ
• scale -> kCAValueFunctionScale
• translation.x -> kCAValueFunctionTranslateX
• translation.y -> kCAValueFunctionTranslateY
• translation.z -> kCAValueFunctionTranslateZ
• translation -> kCAValueFunctionTranslate