Unity - 动态改变Cube的Scale后，获取Cube的实际尺寸Size

 通过BoxCollider来获取到原本的Size，再乘上Scale

var oriSize = GetComponent<BoxCollider>().bound.size
var sizeX = transform.localScale * oriSize.x
var sizeY = transform.localScale * oriSize.y
var sizeZ = transform.localScale * oriSize.z