我正在尝试在Flash中制作一个简单的游戏。到目前为止，我已经使用addChild(objName);向舞台添加了一堆对象。但是，现在我正试图完全删除这些对象。我不想循环遍历每个对象的名称，我确信必须有一种更有效的方法来选择每个对象（可能是通过舞台上的索引）和removeChildAt(index);它。但是，当我尝试这个时，Flash只会移除我在舞台上手动放置的对象。它不会删除通过代码放置的那些。我做了一些搜索，我尝试了多种方法，所有方法都产生相同的结果。大多数人都同意的是这一个：
while (numChildren > 0)
{
removeChildAt(0);
}
你能帮我弄清楚为什么这不会删除编码到舞台上的任何内容吗？
提前致谢：D
编辑：以下是我的代码：
第1帧（随机生成并显示点）：
import flash.events.MouseEvent;
import fl.motion.easing.Linear;
var dotList = new Array(); var level:int = 3; var invisoDotList = new Array();
var loop:int;
var line:Line = new Line();
line.x = 274;
line.y = 187;
addChild(line);
for(loop = 0; loop < level; loop++)
{
var dot:Dot = new Dot();
var invisoDot:InvisoDot = new InvisoDot();
var tester:Boolean = true;
var xval:int = Math.floor(Math.random()*(1+520))+14;
var looper:int = 0;
while(looper < dotList.length)
{
if(Math.abs(xval - dotList[looper].x) > 30)//minimum spacing
{
looper++;
}
else
{
looper = 0;
xval = Math.floor(Math.random()*(1+520))+14;
}
}
dot.x = xval;
dot.y = 187;
invisoDot.x = xval;
invisoDot.y = 187;
invisoDot.alpha = 0;
dotList[loop] = dot;
invisoDotList[loop] = invisoDot;
addChild(invisoDot);
addChild(dot);
}
//trace(dotList); test to ensure that dots are added to the array
var nb1:NextButton = new NextButton();
nb1.x = 0;
nb1.y = 0;
nb1.alpha = 0;
addChild(nb1);
nb1.addEventListener(MouseEvent.CLICK, hideDots);
function hideDots(e:MouseEvent)
{
for(var loop:int = 0; loop < dotList.length; loop++)
{
dotList[loop].alpha = 0;//make dots disappear
}
line.alpha = 0;
nextFrame();
}
stop();
第2帧（显示更多说明并包含稍后将使用的几种方法）：
import flash.events.MouseEvent;
removeChild(nb1);
var nb2:NextButton = new NextButton();
nb2.x = 0;
nb2.y = 0;
nb2.alpha = 0;
addChild(nb2);
nb2.addEventListener(MouseEvent.CLICK, next);
function next(e:MouseEvent)
{
nextFrame();
}
function clearStage()
{
while (numChildren > 0)
{
trace("before" + numChildren);
removeChildAt(0);
trace("after" + numChildren);
}
}
stop();
第3帧（单击它们使点消失并保持准确计数）：
import flash.events.MouseEvent;
import flash.utils.Timer;
line.alpha = 1;
removeChild(nb2);
//setChildIndex(line,0);
var clicks:int = -1;
var passed:int = 0;
var fromLine:Boolean = false;
//trace(dotList.length);
stage.addEventListener(MouseEvent.CLICK, clickCount);
for(var loopvar:int = 0; loopvar < dotList.length; loopvar++)
{
//trace("loop");
dot = dotList[loopvar];
invisoDot = invisoDotList[loopvar];
dot.addEventListener(MouseEvent.CLICK, onClick);
invisoDot.addEventListener(MouseEvent.CLICK, onClick);
//trace("event");
}
//trace(dotList.length);
function onClick(e:MouseEvent)
{
//e.currentTarget.alpha = .5;
for(var hitcheck:int = 0; hitcheck < dotList.length; hitcheck++)
{
if(dotList[hitcheck].x == e.currentTarget.x)
{
dotList[hitcheck].alpha = 1;
}
}
//trace("check");
}
var numChanged:int = 0;
function clickCount(e:MouseEvent)
{
clicks++;
//trace(clicks);
numChanged = 0;
for(var index:int = 0; index < dotList.length; index++)//check whether the user has gotten all the dots
{
if(dotList[index].alpha == 1)
{
numChanged++;
}
}
if(numChanged == level)//if the user has gotten all the dots
{
/*trace("next screen for sucess");
trace(clicks);*/
line.visible = false;
for(loop = 0; loop < dotList.length; loop++)
{
dotList[loop].alpha = 0;//make dots disappear
}
if((clicks - level) == 1)
{
passed = 2
}
else if((clicks - level) == 0)
{
passed = 1;
}
passed = 1;
fromLine = true;
nextFrame();
}
else if((clicks - numChanged) >= 2)//this ends the session as soon as 2 mistakes are made
{
/*trace("next screen for failed number of clicks");
trace(clicks);*/
line.visible = false;
for(loop = 0; loop < dotList.length; loop++)
{
dotList[loop].alpha = 0;//make dots disappear
}
passed = 3;
fromLine = true;
nextFrame();
}
/*else if((clicks - level) >= 2)//if the user has made too many mistakes. This ends the session after the maximum number of tries have been used
{
trace("next screen too many clicks");
trace(clicks);
}*/
}
//trace("end");
stop();
第4帧（生成结果表。附注：有一个错误，其中“Okay”永远不会是结果，因为在第3帧中，传递的值永远不等于2.不确定为什么）：
import flash.text.TextFormat;
import flash.text.TextField;
var failFormat:TextFormat = new TextFormat();
failFormat.color = 0xFF0000;
failFormat.font = "Arial";
failFormat.size = 18;
var passFormat:TextFormat = new TextFormat();
passFormat.color = 0x00FF00;
passFormat.font = "Arial";
passFormat.size = 18;
var okayFormat:TextFormat = new TextFormat();
okayFormat.color = 0x808000;
okayFormat.font = "Arial";
okayFormat.size = 18;
var normalFormat:TextFormat = new TextFormat();
normalFormat.color = 0x000000;
normalFormat.font = "Arial";
normalFormat.size = 18;
var lineResults = new Array();
var squareResults = new Array();
trace(passed);
if(fromLine == true)
{
if(passed == 1)
{
lineResults[lineResults.length] = "Pass";
}
else if(passed == 2)
{
lineResults[lineResults.length] = "Okay";
}
else if(passed == 3)
{
lineResults[lineResults.length] = "Fail";
}
}
fromLine = false;
lineResults = lineResults.reverse();
squareResults = squareResults.reverse();
var loopLength:int = (lineResults.length >= squareResults.length) ? lineResults.length : squareResults.length;
var loopStart:int = 0;
if(loopLength > 11)
{
loopStart = loopLength - 12
}
var cb:CellBlock = new CellBlock();
cb.x = 283.05;
cb.y = 20.35;
addChild(cb);
var col1Head:TextField = new TextField();
col1Head.defaultTextFormat = normalFormat;
col1Head.text = "# of Dots";
col1Head.x = 114.95
col1Head.y = 8.3;
addChild(col1Head);
var col2Head:TextField = new TextField();
col2Head.defaultTextFormat = normalFormat;
col2Head.text = "Line";
col2Head.x = 259.95
col2Head.y = 8.3;
addChild(col2Head);
var col3Head:TextField = new TextField();
col3Head.defaultTextFormat = normalFormat;
col3Head.text = "Square";
col3Head.x = 381.95
col3Head.y = 8.3;
addChild(col3Head);
for(loop = loopStart; loop < loopLength; loop++)
{
var block:CellBlock = new CellBlock();
block.x = 283.05;
block.y = 20.35 + (loop - loopStart + 1)*33;
addChild(block);
var col2:TextField = new TextField();
var col3:TextField = new TextField();
var col1:TextField = new TextField();
/*col2.defaultTextFormat = passFormat;
col3.defaultTextFormat = okayFormat;*/
col1.defaultTextFormat = normalFormat;
switch(lineResults[loop])
{
case "Pass":
col2.defaultTextFormat = passFormat;
break;
case "Okay":
col2.defaultTextFormat = okayFormat;
break;
case "Fail":
col2.defaultTextFormat = failFormat;
break;
}
switch(squareResults[loop])
{
case "Pass":
col3.defaultTextFormat = passFormat;
break;
case "Okay":
col3.defaultTextFormat = okayFormat;
break;
case "Fail":
col3.defaultTextFormat = failFormat;
break;
}
//col2.text = "Pass";
col2.text = lineResults[loop];
col2.x = 260.95;
col2.y = block.y - 12;
addChild(col2);
//col3.text = "Okay";
try
{
col3.text = squareResults[loop];
}
catch(e:Error)
{
}
col3.x = 386.95;
col3.y = block.y - 12;
addChild(col3);
col1.text = String(loop + 1);
col1.x = 133.95;
col1.y = block.y - 12;
addChild(col1);
}
var nb4:NextButton = new NextButton();
nb4.x = 0;
nb4.y = 0;
nb4.alpha = 0;
addChild(nb4);
nb4.addEventListener(MouseEvent.CLICK, clearStage);
stop();
第5帧（下一帧是一个测试，以确保所有内容都被删除，但它没有）：
removeChild(nb4);
stop();
答案 0 :(得分：1)
此错误：
ArgumentError：错误＃1063：Game_fla :: MainTimeline / clearStage（）上的参数计数不匹配。预期0，得到1. clearStage（）
因为您的clearStage()方法已添加为按钮的单击事件处理程序而发生。如果您的clearStage()函数将用作事件处理程序，则需要接受“event”参数。所以你应该定义这样的函数：
function clearStage(event:Event)
{
while (numChildren > 0)
{
trace("before" + numChildren);
removeChildAt(0);
trace("after" + numChildren);
}
}
作为旁注，这意味着如果您还要手动调用clearStage()，即使用它而不将其添加为事件处理程序，则需要包含此event参数...但是您可以传入null，因为您的代码不需要实际使用event参数：
clearStage(null);
我不确定我还有其他错误。我首先将该事件参数添加到clearStage()函数中，如上所示。
我还应该补充一点，我主要使用Flex或纯AS3，并且在Flash CS6和时间轴编程方面不是很熟练：）
答案 1 :(得分：0)
从内存中，我不认为Flash会在您删除孩子时重新订购。如果删除索引0处的子项，则每个其他子项的编号仍为1到x。 childAt（0）现在只是null。请记住这种过程。