blocks|key|2246110|text|偶尔，我仍然会像这样打电话：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2246111|parent["MovieClipName"].someMethod();|offset|length|style|CODE|2246112|时不时的。所以我想你上面的代码应该可以工作。|2246113|然而，每当我发现自己在使用这种语法时，通常意味着我需要重新考虑我的方法，并使用更好的、更面向对象的解决方案。|2246114|因此，我建议您真正需要做的是重新思考导致您尝试使用上述解决方案的因素。你有可能以更面向对象的方式达到同样的目标。|2246115|也许是通过使用继承？你所有的对象都可以从某个公共的父对象扩展吗？|2246116|也许是通过使用一个接口？如果您的对象共享同一个父对象没有意义，也许它们都可以同意共享一些关键功能？|2246117|可能会像下面这样写代码：|2246118|var+tank:Enemy+=+new+Tank();
var+soldier:Enemy+=+new+Soldier();

soldier.attack(target);
tank.attack(target);|code-block|syntax|javascript|2246119|其中tank和soldier类都是从(或实现)+Enemy扩展而来的，如下所示|2246120|public+class+Tank+extends+Enemy|2246121|或者像这样|2246122|public+class+Tank+implements+Enemy|2246123|Enemy类/接口包含attack方法|2246124|entityMap^0|0|0|11|0|0|0|0|0|0|0|0|2|4|7|7|O|5|0|0|0|0|B|6|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@$D|1C|E|1D|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1E|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1F|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1G|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1H|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1I|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1J|8|@]|9|@]|A|$]]|$1|T|3|U|5|V|7|1K|8|@]|9|@]|A|$W|X]]|$1|Y|3|Z|5|6|7|1L|8|@$D|1M|E|1N|F|G]|$D|1O|E|1P|F|G]|$D|1Q|E|1R|F|G]]|9|@]|A|$]]|$1|10|3|11|5|V|7|1S|8|@]|9|@]|A|$W|X]]|$1|12|3|13|5|6|7|1T|8|@]|9|@]|A|$]]|$1|14|3|15|5|V|7|1U|8|@]|9|@]|A|$W|X]]|$1|16|3|17|5|6|7|1V|8|@$D|1W|E|1X|F|G]]|9|@]|A|$]]|$1|18|3|-4|5|6|7|1Y|8|@]|9|@]|A|$]]]|19|$]]

Occasionally, I still make calls along the lines of:

<code>parent["MovieClipName"].someMethod();</code>

from time to time. So I imagine your code above will work.

However, whenever I find myself using that syntax, it usually means I need to re-think my approach and use a better, more object-oriented solution.

So I would suggest that maybe what you really need to do is re-think the factors that are leading you to attempt to use the solution above. Chances are you can reach the same goal in a more object-oriented way.

Perhaps by using inheritance?
Could all of your objects extend from some common parent Object?

Perhaps by using an interface?
If it doesn't make sense for your objects to share the same parent, maybe they all can agree to share some key functions?

Maybe code along the lines of:

<pre><code>var tank:Enemy = new Tank();
var soldier:Enemy = new Soldier();

soldier.attack(target);
tank.attack(target);
</code></pre>

Wnere the <code>tank</code> and <code>soldier</code> classes both extend from (or implement) <code>Enemy</code> like this

<pre><code>public class Tank extends Enemy
</code></pre>

or like this

<pre><code>public class Tank implements Enemy
</code></pre>

and the Enemy class/interface contains the <code>attack</code> method

blocks|key|685386|text|接口是好的。我正在使用一个数组来绘制砖块在舞台上的放置方式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|685387|+mapArry+=++[
++++++[[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],+
++++++[[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
++++++[[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
++++++[[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
++++++];|code-block|syntax|javascript|685388|1指定砖块类型编号为1。但如果下一张地图的砖块类型为2或3，该怎么办？|685389|+mapArry+=++[
++++++[[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],+
++++++[[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
++++++[[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
++++++[[2],[2],[2],[2],[2],[2],[2],[2],[2],[2]],
++++++];|685390|再一次，我遍历数组，获取每一块代码。我如何使用接口来提供给定的模块？|685391|我能想到的唯一答案是创建一个brickManager类。标识每种砖块类型并检索它们的类。但我正在努力提高效率。我想知道是否有更好的方法。|685392|我唯一能想到的就是使用动态初始化。我不知道这种方法与oop背道而驰。|685393|var+newVar+=+new+["brick"%2Bi]();|685394|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

Interfaces is good. I am using an array that maps out how the bricks will be put down on the stage

<pre><code> mapArry = [
 [[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]], 
 [[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
 [[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
 [[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
 ];
</code></pre>

1 specifies brick type Number 1. but what if the next map has brick type 2 or 3

<pre><code> mapArry = [
 [[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]], 
 [[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
 [[1],[1],[1],[1],[1],[1],[1],[1],[1],[1]],
 [[2],[2],[2],[2],[2],[2],[2],[2],[2],[2]],
 ];
</code></pre>

Again, I loop through the array, getting each brick. how would I use interfaces to supply the given brick ?.

The only answer I could think of is the create a brickManager class. a class that identifies each type of brick and retrieves them. But I am trying to be more efficient. I would like to know if there is a better way.

Only thing i could think of is to use dynamic initiations. I didnt know that approach went against oop.

<pre><code>var newVar = new ["brick"+i]();
</code></pre>

blocks|key|837979|text|是的，就像我说的，为了回答你最初的问题，你上面的东西将会在AS3中工作，就像它在旧版本的AS中一样。因此，如果这不是什么大问题，你可以接受它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|837980|总的来说，我不会说动态初始化本身就违背了OOP。然而，它只是感觉有点像黑客。每次我开始使用这样的东西时，我几乎总是发现一个设计上的改变可以干净利落地解决问题。|837981|当然，如果不太了解您的应用程序，就很难发现这种变化。试一试：|837982|你甚至需要为每一块砖块设置不同的类吗？|837983|你能不能只设置一些属性，最终改变它的行为(比如this.strength+=+2)？|837984|然后，在迭代数组时，您可以执行如下操作|837985|for(var+brickType:int+in+brickArray)+{
++++addBrickToScreenOrWhatever(+new+Brick(brickType)+);
}|code-block|syntax|javascript|837986|其中构造器Brick(int)创建一个强度等于参数强度的新Brick。|offset|length|style|CODE|837987|entityMap^0|0|0|0|0|0|0|0|5|A|T|5|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|12|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|13|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|14|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|15|8|@$S|16|T|17|U|V]|$S|18|T|19|U|V]]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|X|$]]

Yes, like I said, to answer your original question, what you have above will work in AS3 as it did in older versions of AS. So if it's not a big deal, you can go with it.

Overall, I wouldn't say dynamic initialization goes against OOP, per se. However, it just feels a little like a hack. Everytime I start to use something like that, I almost always find a design change that cleanly fixes the problem.

Of course it's hard to spot that change without knowing a LOT about your application. To take a stab at it:

Do you even need different classes for each brick?

Could you just set some property that ultimately changes it's behavior (like this.strength = 2)?

Then, while iterating through the array you do something like

<pre><code>for(var brickType:int in brickArray) {
 addBrickToScreenOrWhatever( new Brick(brickType) );
}
</code></pre>

Where the constructor <code>Brick(int)</code> creates a new <code>Brick</code> with a strength equal to that of the parameter.

blocks|key|838037|text|我认为有两种方法可以做到这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|838038|1.使用ApplicationDomain.getDefinition('DynamicTemplate')|offset|length|838039|类似于：|838040|var+DynamicClass:Class+=+this.loaderInfo.applicationDomain.getDefinition('DynamicTemplate')+as+Class;
addChild(new+DynamicClass);|code-block|syntax|javascript|838041|当您的文件具有INITialized时，您需要执行此操作。|838042|2.使用getDefinitionByName()：|838043|var+DynamicClass:Class+=+flash.utils.getDefinitionByName('DynamicTemplate')+as+Class;
addChild(new+DynamicClass);|838044|如果您需要一种方法来获取类名来创建对象的新实例，您可以使用describeType()或通过实例的构造函数，但我认为您无论如何都会了解您的类。|838045|var+TemplateObj:Class+=+flash.utils.getDefinitionByName(describeType(yourIntance).@name)+as+Class;
var+newObj+=+new+TemplateObj();
var+newObj2+=+new+yourIntance.constructor();|838046|希望这能帮上忙，乔治|838047|entityMap|0|LINK|mutability|MUTABLE|url|http://help.adobe.com/en_US/AS3LCR/Flash_10.0/flash/system/ApplicationDomain.html#getDefinition%2528%2529|1|http://help.adobe.com/en_US/AS3LCR/Flash_10.0/flash/utils/package.html#getDefinitionByName%2528%2529|2|http://help.adobe.com/en_US/AS3LCR/Flash_10.0/flash/utils/package.html#describeType%2528%2529^0|0|4|1E|0|0|0|0|0|4|J|1|0|0|T|E|2|0|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|F|3|G|5|6|7|1F|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|1G|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1H|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1I|8|@]|9|@$D|1J|E|1K|1|1L]]|A|$]]|$1|Q|3|R|5|J|7|1M|8|@]|9|@]|A|$K|L]]|$1|S|3|T|5|6|7|1N|8|@]|9|@$D|1O|E|1P|1|1Q]]|A|$]]|$1|U|3|V|5|J|7|1R|8|@]|9|@]|A|$K|L]]|$1|W|3|X|5|6|7|1S|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1T|8|@]|9|@]|A|$]]]|Z|$10|$5|11|12|13|A|$14|15]]|16|$5|11|12|13|A|$14|17]]|18|$5|11|12|13|A|$14|19]]]]

I think there are 2 ways you can do that:

1.Using <a href="http://help.adobe.com/en_US/AS3LCR/Flash_10.0/flash/system/ApplicationDomain.html#getDefinition%28%29" rel="nofollow noreferrer">ApplicationDomain.getDefinition('DynamicTemplate')</a>

something like:

<pre><code>var DynamicClass:Class = this.loaderInfo.applicationDomain.getDefinition('DynamicTemplate') as Class;
addChild(new DynamicClass);
</code></pre>

You would need to do this when you file has INITialized.

2.Using <a href="http://help.adobe.com/en_US/AS3LCR/Flash_10.0/flash/utils/package.html#getDefinitionByName%28%29" rel="nofollow noreferrer">getDefinitionByName</a>() :

<pre><code>var DynamicClass:Class = flash.utils.getDefinitionByName('DynamicTemplate') as Class;
addChild(new DynamicClass);
</code></pre>

If you need a way to get Class names to create new instances of objects, you could use <a href="http://help.adobe.com/en_US/AS3LCR/Flash_10.0/flash/utils/package.html#describeType%28%29" rel="nofollow noreferrer">describeType()</a> or go through the instance's constructor, but I reckon you would know your classes anyway.

<pre><code>var TemplateObj:Class = flash.utils.getDefinitionByName(describeType(yourIntance).@name) as Class;
var newObj = new TemplateObj();
var newObj2 = new yourIntance.constructor();
</code></pre>

Hope this help,
George

blocks|key|685471|text|我想我会采用乔治的解决方案。除了我对它有点小问题。我试着做第二个例子。我的代码如下。当我直接调用这个类时，它可以工作，但当我根据定义调用时。不起作用。任何解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|685472|package+com.objects+{

++++import+flash.display.Sprite;
++++import+flash.events.*;
++++import+flash.display.Stage;
++++import+flash.text.TextField;
++++import+flash.text.TextFormat;
++++import+flash.text.AntiAliasType;
++++import+flash.utils.*;

++++public+class+Engine+extends+Sprite+{
++++++++private+var+pad:Paddle;
++++++++private+var+sRef:Stage;
++++++++private+var+ball:Ball;
++++++++private+var+bricks:BrickMap;
++++++++private+var+brickHolder:Array;
++++++++public+var+numberOfBricks:Number+=+0;
++++++++public+var+scoreBoard:TextField;
++++++++public+var+score:Number+=+0;
++++++++private+var+level+=+1;
++++++++private+var+ready:Ready;

++++++++public+function+Engine(stageRef:Stage):void
++++++++{
++++++++++++addHud();

++++++++++++brickHolder+=+new+Array();
++++++++++++sRef+=+stageRef;
++++++++++++pad+=+new+Paddle();
++++++++++++pad.x+=+sRef.stageWidth/2;
++++++++++++pad.y+=+550;
++++++++++++ball+=+new+Ball();
++++++++++++ready+=+new+Ready();
++++++++++++ready.x+=+sRef.stageWidth/2;
++++++++++++ready.y+=+sRef.stageHeight/2;

++++++++++++ready.addEventListener(MouseEvent.CLICK,gameStart);
++++++++++++addChild(ready);
++++++++++++bricks+=+new+BrickMap();

++++++++++++generateMap();++++++++++
++++++++}

++++++++private+function+generateMap():void
++++++++{
++++++++++++var+mapW:Number+=+bricks.mapArry[0].length;
++++++++++++var+mapH:Number+=+bricks.mapArry.length;
++++++++++++for(var+y+=+0;+y+<+mapH;+y%2B%2B)
++++++++++++{
++++++++++++++++brickHolder[y]+=+new+Array();
++++++++++++++++for(var+x+=+0;+x+<+mapW;+x%2B%2B)
++++++++++++++++{
++++++++++++++++++++var+classRef+=+getDefinitionByName('Brick2')+as+Class;
++++++++++++++++var+brick:Brick2+=+Brick2(new+classRef());
++++++++++++++++++++brick.name+=+x%2B""%2By;
++++++++++++++++++++brick.getBall(ball);
++++++++++++++++++++brick.getEngine(this);
++++++++++++++++++++brick.x+=+x+*+brick.bWidth+%2B+brick.bWidth;
++++++++++++++++++++brick.y+=+y+*+brick.bHeight+%2B+100;
++++++++++++++++++++numberOfBricks+%2B=+1;
++++++++++++++++++++addChild(brick);

++++++++++++++++}
++++++++++++}
++++++++}//End+Generate+Map
+++++++}
}|code-block|syntax|javascript|685473|我编辑了上面的内容以|685474|var+classRef+=+getDefinitionByName('Brick2')+as+Class;
var+brick:Brick2+=+Brick2(new+classRef());|685475|还将import更改为|685476|import+flash.utils.*;|685477|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I think I am going to go with george's solution. Except I am having a little issue with it. I was trying to do the second example. my code is below. When I call the class directly it works, but when i call by definition. doesnt work. any solution

<pre><code>package com.objects {

 import flash.display.Sprite;
 import flash.events.*;
 import flash.display.Stage;
 import flash.text.TextField;
 import flash.text.TextFormat;
 import flash.text.AntiAliasType;
 import flash.utils.*;

 public class Engine extends Sprite {
 private var pad:Paddle;
 private var sRef:Stage;
 private var ball:Ball;
 private var bricks:BrickMap;
 private var brickHolder:Array;
 public var numberOfBricks:Number = 0;
 public var scoreBoard:TextField;
 public var score:Number = 0;
 private var level = 1;
 private var ready:Ready;

 public function Engine(stageRef:Stage):void
 {
 addHud();

 brickHolder = new Array();
 sRef = stageRef;
 pad = new Paddle();
 pad.x = sRef.stageWidth/2;
 pad.y = 550;
 ball = new Ball();
 ready = new Ready();
 ready.x = sRef.stageWidth/2;
 ready.y = sRef.stageHeight/2;

 ready.addEventListener(MouseEvent.CLICK,gameStart);
 addChild(ready);
 bricks = new BrickMap();

 generateMap(); 
 }

 private function generateMap():void
 {
 var mapW:Number = bricks.mapArry[0].length;
 var mapH:Number = bricks.mapArry.length;
 for(var y = 0; y &lt; mapH; y++)
 {
 brickHolder[y] = new Array();
 for(var x = 0; x &lt; mapW; x++)
 {
 var classRef = getDefinitionByName('Brick2') as Class;
 var brick:Brick2 = Brick2(new classRef());
 brick.name = x+""+y;
 brick.getBall(ball);
 brick.getEngine(this);
 brick.x = x * brick.bWidth + brick.bWidth;
 brick.y = y * brick.bHeight + 100;
 numberOfBricks += 1;
 addChild(brick);

 }
 }
 }//End Generate Map
 }
}
</code></pre>

I edited the above to

<pre><code>var classRef = getDefinitionByName('Brick2') as Class;
var brick:Brick2 = Brick2(new classRef());
</code></pre>

also change import to 

<pre><code>import flash.utils.*;
</code></pre>

blocks|key|2246377|text|如果你想这样做，你可以很简单，例如一个游戏的编辑器：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2246378|selectItem(e.target);+++++++

private+function+selectItem(whatItem:Object):void
{
++++var+TemplateObj:Class+=+getDefinitionByName(getQualifiedClassName(whatItem))+as+Class;
++++var+newItem:*+=+new+TemplateObj();|code-block|syntax|javascript|2246379|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can simple if you want to do it for example an editor for a game: 

<pre><code>selectItem(e.target); 

private function selectItem(whatItem:Object):void
{
 var TemplateObj:Class = getDefinitionByName(getQualifiedClassName(whatItem)) as Class;
 var newItem:* = new TemplateObj();
</code></pre>

I notice in older version of flash you can create an instance of a dynamic class. I am creating a game that will have many different classes that can be displayed on the stage but can very from time to time. How would I go about calling them dynamically. for example

<pre><code>var newObject = new ["DynamicObject"]();
</code></pre>

?? 

Is this possible in As3 ??

Dynamic Object Initiation As3

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我注意到在旧版本的flash中，你可以创建一个动态类的实例。我正在创建一个游戏，将有许多不同的类，可以在舞台上显示，但可以非常不时。我该如何动态地调用它们呢？例如var newObject = new ["DynamicObject"]();?？这在As3中是可能的吗？

问动态对象初始化As3
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问动态对象初始化As3EN