AS3加载swf为影片剪辑

Question

我需要加载外部swf，并能够将其用作FlashDevelop中的影片剪辑，即我需要能够去特定的关键帧，开始和停止播放等。一些简单的工作示例代码将非常感激，因为我无法找到任何令人满意的教程通过谷歌。

编辑 现在我有了这个代码

package 
{
import flash.net.*;
import flash.display.*;
import flash.events.*;
import flash.utils.getQualifiedClassName;
public class Main extends MovieClip 
{
    var animatedBox:MovieClip = new MovieClip();
    var ldr:Loader = new Loader();
    var frames:int = 0;
    public function Main():void 
    {
        if (stage) init();
        else addEventListener(Event.ADDED_TO_STAGE, init);
    }
    private function init(e:Event = null):void 
    {
        removeEventListener(Event.ADDED_TO_STAGE, init);
        ldr.contentLoaderInfo.addEventListener(Event.COMPLETE, onload);
        ldr.load(new URLRequest("../lib/test.swf"));
    }
    function onload(e:Event)
    {
        if ( !e.target )
        return;
        if( e.target.content is MovieClip )
        {
            animatedBox = e.target.content as MovieClip;
            animatedBox.gotoAndPlay("Start");
        }
        else
        {
            trace( getQualifiedClassName( e.target.content ) );
        }
    }
}
}

在我尝试运行它后，我得到[Fault]异常，信息=TypeError: Error #1009:不能访问一个空对象引用的属性或方法。什么好主意吗?

Answer 1

import flash.utils.getQualifiedClassName;
var mc: MovieClip;
var ldr: Loader = new Loader();
ldr.contentLoaderInfo.addEventListener( Event.COMPLETE, onLoad );
ldr.load( new URLRequest("your.swf") );

function onLoad( e:Event ):void 
{
    if( !e.target )
        return;
    trace( getQualifiedClassName( e.target.content ) );
    /* if you get: flash.display::AVM1Movie
       it means you are trying to load an AS1 or AS2 SWF
       into AS3 SWF. They both need to be AS3 */
    mc = e.target.content as MovieClip;
    mc.gotoAndPlay( 2 );    
    // or  mc.gotoAndPlay( 'yourLabel' ); 
}