iosanimationWithKeyPath

animationWithKeyPath的值：

　 transform.scale = 比例轉換

    transform.scale.x = 闊的比例轉換

    transform.scale.y = 高的比例轉換

    transform.rotation.z = 平面圖的旋轉

    transform.translation.x

transform.translation.y

transform.translation.z

    opacity = 透明度

    margin

    zPosition

    backgroundColor    背景颜色

    cornerRadius    圆角

    borderWidth

    bounds

    contents

    contentsRect

    cornerRadius

    frame

    hidden

    mask

    masksToBounds

    opacity

    position

    shadowColor

    shadowOffset

    shadowOpacity

    shadowRadius

https://developer.apple.com/library/prerelease/ios/releasenotes/General/iOS80APIDiffs/frameworks/QuartzCore.html