ActionScript3删除子错误

Question

最近，我一直在将as2 fla转换为as3 (AS3中的新版本)，并且整个程序都在进行导出，但是当我尝试在加载新swf之前删除以前加载的swf时，会出现一个错误。

ArgumentError: Error #2025: The supplied DisplayObject
must be a child of the caller.
at flash.display::DisplayObjectContainer/removeChild()
at MethodInfo-11()

我知道这个错误与我的removeChild代码有关：

`stage.addEventListener(MouseEvent.CLICK, removeSWF);
function removeSWF (e:MouseEvent):void 
{
if(vBox.numChildren !=0){        
   // swfLoader.unloadAndStop();
    vBox.removeChild(swfLoader);// empty the movieClip memory
}
}`

但是，我似乎找不到一个合适的重写为这段代码将工作和没有一个错误。这段代码正在运行，所以我不确定是否值得花时间修复这个错误，或者只留下它。我已经把它搞砸了几天了，所以在这一点上，我无法修复它，这让我很沮丧。在这种情况下，阶段鼠标点击侦听器是有用的，因为我在这段代码中没有显示一个后退按钮，在移到另一个场景之前清除加载的swf。是否有人看到了这方面的简单解决方案，或者您是否认为没有必要去追求，因为代码可以满足我的要求？整个代码：

function launchSWF(vBox, vFile):void    {
var swfLoader:Loader = new Loader();
var swfURL:URLRequest = new URLRequest(vFile);
swfLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, onProgressHandler);
swfLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadProdComplete);
swfLoader.load(swfURL);

function loadProdComplete(e:Event):void {
    trace("swf file loaded");   
    vBox.removeChild(preLoader);
    vBox.addChild(swfLoader);   
    currentSWF = MovieClip(swfLoader.content);
    currentSWF.gotoAndPlay(1);
    currentSWF.addEventListener(Event.ENTER_FRAME , checkLastFrame);
    swfLoader.x = 165;
    swfLoader.y = 15;

    function checkLastFrame(e:Event):void { 
        if (currentSWF.currentFrame == currentSWF.totalFrames) {
        currentSWF.stop();
        // trace("DONE");     
        }
    }      
} 
var preLoader:loader = new loader();
preLoader.x = 450;
preLoader.y = 280;
vBox.addChild(preLoader);

        function onProgressHandler(event:ProgressEvent){
            var dataAmountLoaded:Number=event.bytesLoaded/event.bytesTotal*100;
            //preLoader.bar.scaleX = dataAmountLoaded/100;
            preLoader.lpc.text= int(dataAmountLoaded)+"%";
            //trace(preLoader.bar.scaleX );
        }   
//NEW ERRORS BUT WORKING
stage.addEventListener(MouseEvent.CLICK, removeSWF);
function removeSWF (e:MouseEvent):void 
{
if(vBox.numChildren !=0){        
   // swfLoader.unloadAndStop();
    vBox.removeChild(swfLoader);// empty the movieClip memory
}
}
}
var container:MovieClip = new MovieClip();
var currentSWF:MovieClip = new MovieClip();

fall_b.addEventListener(MouseEvent.CLICK, fall_bClick);
  function fall_bClick(e:MouseEvent):void {
  var swfFile:String = 'load/fall.swf';
  launchSWF(container, swfFile);
  addChild(container);
  }

face_b.addEventListener(MouseEvent.CLICK, face_bClick);
  function face_bClick(e:MouseEvent):void {
  var swfFile:String = 'load/face.swf';
  launchSWF(container, swfFile);
  addChild(container);
  }

rott_b.addEventListener(MouseEvent.CLICK, rott_bClick);
  function rott_bClick(e:MouseEvent):void {
  var swfFile:String = 'load/rottgut.swf';
  launchSWF(container, swfFile);
  addChild(container);
  }
//MORE SWFS...

如果有人有任何建议，我们将不胜感激

Answer 1

首先，function launchSWF(vBox, vFile):void {没有关闭。您还拥有函数内部的函数，如果单击花括号开始和结束的行来跟踪它们，就可以很容易地解决这些问题。

我看不出你说的代码有什么问题，但我猜这不是所有的代码。如果使用Flash，则可以使用允许调试来显示错误所在的行。

编辑：，请注意，这还没有经过测试，因为我正在手机上编写代码。尽管如此，这一点现在应该奏效：

var container:MovieClip;
var currentSWF:MovieClip;

var swfFile:String;

var swfLoader:Loader;
var preLoader:Loader;

var swfURL:URLRequest;

init();

function init():void {
    preLoader = new Loader();
    preLoader.x = 450;
    preLoader.y = 280;
    vBox.addChild(preLoader);

    container = new MovieClip();
    currentSWF = new MovieClip();
    fall_b.addEventListener(MouseEvent.CLICK, fall_bClick);
    face_b.addEventListener(MouseEvent.CLICK, face_bClick);
    rott_b.addEventListener(MouseEvent.CLICK, rott_bClick);

    stage.addEventListener(MouseEvent.CLICK, removeSWF);
}

function launchSWF(vBox, vFile):void {
    swfLoader = new Loader();
    swfURL = new URLRequest(vFile);
    swfLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, onProgressHandler);
    swfLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadProdComplete);
    swfLoader.load(swfURL);
}

function loadProdComplete(e:Event):void {
    trace("swf file loaded");   
    vBox.removeChild(preLoader);
    vBox.addChild(swfLoader);   
    currentSWF = MovieClip(swfLoader.content);
    currentSWF.gotoAndPlay(1);

    currentSWF.addEventListener(Event.ENTER_FRAME , checkLastFrame);
    swfLoader.x = 165;
    swfLoader.y = 15;
}

function checkLastFrame(e:Event):void { 
    if (currentSWF.currentFrame == currentSWF.totalFrames) {
        currentSWF.stop();
        // trace("DONE");
    }      
} 

function onProgressHandler(event:ProgressEvent) {
     var dataAmountLoaded:Number = (event.bytesLoaded / event.bytesTotal * 100);
     //preLoader.bar.scaleX = dataAmountLoaded/100;
     preLoader.lpc.text = int(dataAmountLoaded)+"%";
     //trace(preLoader.bar.scaleX );
}

function removeSWF (e:MouseEvent):void {
    if(vBox.numChildren !=0){        
        //swfLoader.unloadAndStop();
        vBox.removeChild(swfLoader);// empty the movieClip memory
    }
}

function fall_bClick(e:MouseEvent):void {
    swfFile = 'load/fall.swf';
    launchSWF(container, swfFile);
    addChild(container);
}

function face_bClick(e:MouseEvent):void {
    swfFile = 'load/face.swf';
    launchSWF(container, swfFile);
    addChild(container);
}

function rott_bClick(e:MouseEvent):void {
    swfFile = 'load/rottgut.swf';
    launchSWF(container, swfFile);
    addChild(container);
}

Answer 2

我把这个重写了。我无法在原始代码中清除vBox错误，而且在发布的内容中我还得到了许多其他错误。在教程中看到了vBox代码。我认为它应该引用预加载程序和swf的加载程序，vFile用于实际的.swf。下面的代码预加载多个swfs并清除它们，没有错误。非常感谢你的帮助，AntBirch。我现在开始更多地理解as3中的加载器了。

//LOAD FIRST PIECE ON OPEN (required to removeChild later)
   var swfLoader:Loader = new Loader();
   var defaultSWF:URLRequest = new URLRequest("load/fall.swf");
   swfLoader.load(defaultSWF);
   swfLoader.x = 165;
   swfLoader.y = 15;
   addChild(swfLoader);
//PRELOADER
   var preLoader:loader = new loader();
   preLoader.x = 450;
   preLoader.y = 280;

function loadProdComplete(e:Event):void {
   trace("swf file loaded");    
   removeChild(preLoader);
   addChild(swfLoader); 
}

function onProgressHandler(event:ProgressEvent){
   var dataAmountLoaded:Number=event.bytesLoaded/event.bytesTotal*100;
   preLoader.lpc.text= int(dataAmountLoaded)+"%";
}
//BUTTONS
function btnClick(event:MouseEvent):void {

   swfLoader.unloadAndStop();
   removeChild(swfLoader);
   swfLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,      onProgressHandler);
swfLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,  loadProdComplete);    
addChild(preLoader);    
var newSWFRequest:URLRequest = new URLRequest("load/" + event.target.name +    ".swf");
swfLoader.load(newSWFRequest);
swfLoader.x = 165;
swfLoader.y = 15;;
addChild(swfLoader);
}

// BUTTON LISTENERS
fall.addEventListener(MouseEvent.CLICK, btnClick);  
face.addEventListener(MouseEvent.CLICK, btnClick);
rott.addEventListener(MouseEvent.CLICK, btnClick);  
angel.addEventListener(MouseEvent.CLICK, btnClick);
ratts.addEventListener(MouseEvent.CLICK, btnClick); 
metal.addEventListener(MouseEvent.CLICK, btnClick);
//etc...    


//BACK BUTTON
BB3.addEventListener(MouseEvent.CLICK, BB3Click);

function BB3Click(e:MouseEvent):void {
   swfLoader.unloadAndStop();
   removeChild(swfLoader);
   this.gotoAndPlay(1 ,"Scene 2")
}