Get width and height of embed image in Flex?

I have the follow declaration :

[Embed(source="i/6.png")]
private var img6 : Class;

• How开发者_如何学Go can i determine "img6" width and height ?

You can determine size of embed image only on instantiation. Something like:

<s:BitmapImage source="{img6}" complete="completeHandler(event)" />
…
private function completeHandler(event:Event):void
{
    var image:BitmapImage = BitmapImage(event.currentTarget);
    trace (image.sourceWidth);
    trace (image.sourceHeight);
}