带有#keyPath的CATransform3D密钥路径

Question

对于Swift 3中带有新的#keyPath关键字的CATransform3D属性，是否可以使用增强的密钥路径(如描述的CATransform3D)？

换句话说，要取代

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

就像

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

Answer 1

应该使用CAValueFunction。

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

->

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

和

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

->

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

等。

• 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