ActionScript 属性 - 公共 Getter、受保护的 Setter

发布于 2024-12-03 20:06:38 字数 929 浏览 0 评论 0原文

是否有可能拥有一个具有公共 getter 和受保护 setter 的属性？

我有以下代码：

public class Mob extends Sprite {
    // snip

    private var _health:Number; // tried making this protected, didn't work
    public function get health():Number { return _health; }
    protected function set health(value:Number):void {
        _health = value;
    }

    // snip

    public function takeDamage(amount:Number, type:DamageType, ... additionalAmountAndTypePairs):void {
        var dmg:Number = 0;
        // snip
        var h:Number = this.health; // 1178: Attempted access of inaccessible property health through a reference with static type components.mobs:Mob.
        this.health = h - dmg; // 1059: Property is read-only.
    }
}

我确实有 this.health -= dmg; 但我将其拆分以获取有关编译器错误的更多详细信息。

我不明白该属性如何在同一类中被视为只读。我也不明白为什么它无法访问。

如果我将支持字段、getter 和 setter 全部设置为受保护，它可以编译，但这不是我想要的结果；我需要健康状况可以从外部读取。

原文

Is it possible to have a property with a public getter and protected setter?

I have the following code:

public class Mob extends Sprite {
    // snip

    private var _health:Number; // tried making this protected, didn't work
    public function get health():Number { return _health; }
    protected function set health(value:Number):void {
        _health = value;
    }

    // snip

    public function takeDamage(amount:Number, type:DamageType, ... additionalAmountAndTypePairs):void {
        var dmg:Number = 0;
        // snip
        var h:Number = this.health; // 1178: Attempted access of inaccessible property health through a reference with static type components.mobs:Mob.
        this.health = h - dmg; // 1059: Property is read-only.
    }
}

I did have this.health -= dmg; but I split it out to get more details on the compiler errors.

I don't understand how the property would be considered read-only within the same class. I also don't understand how it's inaccessible.

If I make the backing field, getter, and setter all protected, it compiles but it's not the result I want; I need health to be readable externally.

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哆啦不做梦 2024-12-10 20:06:38

不可以，访问者必须具有彼此相同的权限级别。您可以拥有您的公众
get set 函数，然后有一个受保护的 setHealth、getHealth 函数对。如果您愿意，您可以反转它，但关键是您有一组方法可以以公共权限进行访问，而另一组方法可以以受保护的权限级别进行访问。

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子栖 2024-12-10 20:06:38

由于您将仅从 Mob 类内部更新 _health，因此您可以编写一个私有函数来设置它。

private function setHealth(value:Number):void
{
    _health = value;
}

并保持公共吸气剂本身。

Since you will be updating _health from inside your Mob class only, you can write a private function for setting it.

private function setHealth(value:Number):void
{
    _health = value;
}

And keep the public getter as such.

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巨坚强 2024-12-10 20:06:38

我不是专家，但我想你可能想使用

internal var _health:Number;
public function get health():Number { return _health; }
internal function set health(value:Number):void { _health = value; }

I'm no expert, but I think you may want to use

internal var _health:Number;
public function get health():Number { return _health; }
internal function set health(value:Number):void { _health = value; }

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