加载新swf时无法卸载以前的swf

Question

我已经在adobe flash中制作了一个主导航页面，并在其中添加了3个按钮。我使用此代码是为了根据按下的按钮调用一些外部swf。问题是，当我按下按钮加载一个swf时，我希望卸载前一个swf。我怎么做呢?我什么都试过了。

var myLoader:Loader = new Loader();        
var myLoaderMain:URLRequest = new URLRequest("main1.swf");
var myLoaderQuiz:URLRequest = new URLRequest("quiz.swf");
var myLoaderAnimation:URLRequest = new URLRequest("athens_animation.swf");
var myLoaderVideo:URLRequest = new URLRequest("videogallery.swf");


videogallerybtn.addEventListener(MouseEvent.CLICK, videoFunc);

function videoFunc(curEvt:MouseEvent) {
myLoader.load(myLoaderVideo);
addChild(myLoader); 
 }

 Quizbtn.addEventListener(MouseEvent.CLICK, quizFunc);
 function quizFunc(curEvt:MouseEvent) {
myLoader.load(myLoaderQuiz);
addChild(myLoader);

 }

 Animationbtn.addEventListener(MouseEvent.CLICK, AnimationFunc);

 function AnimationFunc(curEvt:MouseEvent) {
myLoader.load(myLoaderAnimation);
addChild(myLoader);
 }

Answer 1

每个按钮有两个事件侦听器，第一个Mouse_Down用于卸载加载器，MOUSE_UP用于加载加载器。

    videogallerybtn.addEventListener(MouseEvent.MOUSE_DOWN, mouseDown);
    videogallerybtn.addEventListener(MouseEvent.MOUSE_UP, MouseUP);

     function MouseDown(curEvt:MouseEvent) {
     trace("mouseDown so unload, remove");
     }

     function MouseUP(curEvt:MouseEvent) {
     trace("mouseUP so load something and add it");
     }

希望你能领会其中的原理。