Actionscript 3 AS3 Flex将图像嵌入到Sprite

以下两者之间的区别是什么：

[Embed(source = "../assets/graphic.png")]
const GRAPHIC:Class;
var graphic:Bitmap = new GRAPHIC();
addChild(graphic);

以及：

---

我应该使用哪一个？为什么？

第一个是一个变量指针，指向

GRAPHIC

类的实例化副本。第二个是隐式声明

如果需要对对象执行进一步的操作，可以使用指针。例如

graphic.name = "myGraphic";
graphic.alpha = 0.5;
someFunction(graphic);

var settings:Object = {
    "x":20,
    "alpha":0.5
}
setProperties(foo, settings);

// Instead, you can do it in one line, with an implicit declaration.
setProperties(foo, {"x":20, "alpha":0.5});

设置属性并将其作为参数传递给其他函数是指针的好例子。如果不需要这样做，可以使用隐式声明。你可以在其他有意义的地方这样做。例如

graphic.name = "myGraphic";
graphic.alpha = 0.5;
someFunction(graphic);

var settings:Object = {
    "x":20,
    "alpha":0.5
}
setProperties(foo, settings);

// Instead, you can do it in one line, with an implicit declaration.
setProperties(foo, {"x":20, "alpha":0.5});