我找到了apple官方介绍地址：官网地址
animationWithKeyPath的值如下：
anchorPoint
backgroundColor
backgroundFilters
borderColor
borderWidth
bounds
compositingFilter
contents
contentsRect
cornerRadius
doubleSided
filters
frame ：This property is not animatable. You can achieve the same results by animating theboundsandpositionproperties.
hidden
mask
masksToBounds
opacity
position
shadowColor
shadowOffset
shadowOpacity
shadowPath
shadowRadius
sublayers
sublayerTransform
transform 翻转包含scale rotation
zPosition
大部分我们常用的是：
transform.scale = 比例缩放动画
transform.scale.x = 宽的比例动画
transform.scale.y = 高的比例动画
transform.rotation.z = 平面的旋转
opacity = 透明度
