使用#keyPath CATransform3D密钥路径

Question

是否可以使用增强型密钥路径（如here所述）对Swift 3中的CATransform3D属性使用新的#keyPath关键字？

换句话说，取代

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

类似

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

Answer 1

应该使用CAValueFunction。

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

- ＆GT;

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

和

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

- ＆GT;

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

等

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