How do I change the size and color of the stage in actionscript 3?

AFAIK, in AS2 it was "Stage.height = x;".开发者_JAVA技巧

---

From documentation of flash.display.stage in AS3:

The Stage object is not globally accessible. You need to access it through the stage property of a DisplayObject instance.

Also refer to this: Setting Stage properties

---

Depends on how you are compiling your .swf, but it is completely possible. If you are building a Flex project, you can set the backgroundColor property of the Application or use a css file to change it. e.g.

<mx:Application 
    backgroundColor="#000000" 
    width="500"
    height="500"
    layout="absolute"
    xmlns:mx="http://www.adobe.com/2006/mxml">

</mx:Application>

If you are building in Flex (an "Actionscript Project") or using the mxmlc compiler, you can use the undocumented "SWF" metadata tag, e.g.

package
{
    [SWF(width="500", height="500", backgroundColor="#000000")]
    public class MyApp extends Sprite
    {

    }
}

And of course, if you're using Flash "the application", you can just click the stage and then go to the properties panel and set the width, height, and background color.

---

You really can't... the background color is not really a stage property, you should work-around it by changing some background clip. As for the size, in AIR you can directly change the NativeWindow dimesions, but in a browser you need to use javascript to change the object's size:

document.getElementById("myFlash").height=100;

You could use stage.width = 100, but it will only change the displayobject's dimensions, truncating its content, and leaving an empty space next to it... Actually Stage.width is read-only in AS3 and AS2.

---

This is easy. In the main CData block, "this" is the application object. Then:

this.setStyle("backgroundColor", 0xff0000);

This is much better than starting to creates sprites and rendering with the graphics layer, since presumably the best performance is with a flat fill in the absence of any objects in front.