ActionScript - 只读属性和私有集方法?

问题描述

我从未真正了解 AS3 的一件事是，您不能同时拥有私有 set 方法和公共 get 方法.

one thing i've never really understood about AS3 is that you can't have a private set method and a public get method together.

在我的班级中，我想分配会调用私有集合函数的值:

from within my class i would like to assign values that would call a private set function:

myNumber = 22;

但我需要将该数字作为参数传递给函数

but i need to pass that number as a parameter to a function

myNumber(22);

例如:

package
{
//Imports
import flash.display.Sprite

//Class
public class NumberClass extends Sprite
    {
    //Properties
    private var myNumberProperty:Number

    //Constructor
    public function NumberClass(myNumber:Number):void
        {
        this.myNumber = myNumber;

        init();
        }

    //Initialize
    private function init():void
        {
        trace(myNumber);
        }

    //My Number Setter
    private function set myNumber(value:Number):void
        {
        myNumberProperty = Math.max(0, Math.min(value, 100));
        }

    //My Number Getter
    public function get myNumber():Number
        {
        return myNumberProperty;
        }
    }
}

有没有办法在私有函数上使用 set 关键字?

is there no way to use the set keyword on a private function?

推荐答案

MXML 编译器不支持具有混合作用域/命名空间的 getter 和 setter.有几张票就此打开:

The MXML compiler does not support getters and setters with mixed scopes/namespaces. There are a few tickets open regarding this:

• https://bugs.adobe.com/jira/browse/ASL-44
• https://bugs.adobe.com/jira/browse/SDK-25646
• https://bugs.adobe.com/jira/browse/ASL-112.

这很烦人，但至少 Adob​​e 意识到了这一点.有一种方法可以通过使用自定义命名空间和对 getter 或 setter 的完全限定引用来实现混合命名空间 getter 和 setter.

It's quite annoying, but at least Adobe is aware of it. There is a way to accomplish mixed namespace getters and setters by using custom namespaces and fully-qualifying references to the getter or setter.

package {

    use namespace my_namespace

    public class MyClass {

        private var _name:String;

        public function get name():String {
            return _name;
        }

        my_namespace function set name(value:String):void {
            _name = value;
        }
     }

     public class MySubClass extends MyClass {

       public function MySubClass(name:String) {
           super.my_namespace::name = name;
       }
    }
  }
}

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