将参数传递给 AS3 自动创建的资产类的构造函数

发布于 2024-07-15 22:11:36 字数 746 浏览 6 评论 0原文

我正在创建一个 MovieClip 子类（我们称之为 MyClip），我想将其用于多个库资源。我将通过 ActionScript 代码实例化这些影片剪辑。 MyClip 有一个构造函数参数，允许它设置某些属性的初始值。

由于我想将它用于多个库资源，因此逻辑方法似乎是在“符号属性”对话框的“基类”文本框中指定它。问题是自动生成的子类没有带参数的构造函数。相反，Flash 尝试仅使用默认构造函数生成它们，这也会失败，因为 MyClip 没有默认构造函数。

除了将属性初始化推迟到普通方法之外，还有什么办法可以解决这个问题吗？

编辑：我还不够清楚，我会尽力在这里澄清。如果这是 MyClip 类：

public class MyClip extends MovieClip
{
    private var someValue : Number;

    public function MyClip(someValue : Number)
    {
        this.someValue = someValue;
    }
}

并且我指定 MyClip 作为库中符号 MyClipA 的基类，我希望能够执行 clip = new MyClipA(17); 无需自己编写 MyClipA 类。

原文

I'm creating a MovieClip subclass (let's call it MyClip) that I want to use for several library assets. I'll be instantiating these movie clips from ActionScript code. MyClip has a constructor parameter that allows it to set the initial values of certain properties.

Since I want to use it for multiple library assets, the logical way to do it seems to specify it in the "Base Class" text box in the "Symbol Properties" dialog. The problem is that the auto-generated subclasses don't have the constructor with the parameter. Instead, Flash tries to generate them with a default constructor only, which also fails because MyClip doesn't have a default constructor.

Is there any way around this, apart from deferring property initialization to a normal method?

Edit: I haven't been clear enough, I'll try to clarify here. If this is the MyClip class:

public class MyClip extends MovieClip
{
    private var someValue : Number;

    public function MyClip(someValue : Number)
    {
        this.someValue = someValue;
    }
}

and I specified MyClip as base class for symbol MyClipA in the library, I would ideally like to be able to do clip = new MyClipA(17); without having to write the MyClipA class myself.

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故事未完 2024-07-22 22:11:36

我假设您需要创建 MyClipA 和 MYClipB 等类的原因是将不同的艺术附加到仅具有 MyClip 对象行为的对象？

也许您可以以不同的方式处理它，将您的基类 - MyClip 作为您的示例，接受 2 个参数，其中之一是对艺术的引用：

public class MyClip extends MovieClip
{
    public var art:ArtBaseClass
    private var someValue : Number;

    public function MyClip(someValue : Number, artClass:ArtBaseClass)
    {
        this.someValue = someValue;
        this.art = new artClass();
        this.addChild(art);
    }
}

并且您可以在应用于每个 ArtBaseClass 中定义您需要的任何其他内容这些艺术图书馆的物品。

I'm assuming the reason you need to create MyClipA and MYClipB, etc classes is to attach different art to objects that just have the behaviors of a MyClip object?

Maybe you could approach it differently, make your base class - MyClip as you have it your example, accept 2 aruguments, one of which is a reference to the art:

public class MyClip extends MovieClip
{
    public var art:ArtBaseClass
    private var someValue : Number;

    public function MyClip(someValue : Number, artClass:ArtBaseClass)
    {
        this.someValue = someValue;
        this.art = new artClass();
        this.addChild(art);
    }
}

And you could define whatever else you need in a ArtBaseClass that is applied to each of these art library objects.

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