AS3：类之间导入类/共享变量 [英] AS3: Importing classes/Sharing variables between classes

问题描述

好吧，这是我的问题：我有一个变量在一个名为镜子类

Ok, this is my problem: i have a variable in a class named Mirror

public var line:Sprite = new Sprite(); 

我想使用这个变量在另一个名为MovieClip类。我在MovieClip类进口类：

i want to use that variable in another class named MovieClip. I imported the class in the MovieClip class:

   public class MovieClips extends MovieClip
{
    import Mirror;
    public function MovieClips(radius:int, _x:int, _y:int,size:int,span:int,addl:Array) 
    {....

但是当我尝试做这样的事情：

but when i try to do something like this:

if (Mirror.line.hitTestObject(ball) == true) {
                    speedY *= -1;
                }

它显示了类似的错误：通过静态类型类参考阿塞斯可能未定义的属性线。我不知道我做了什么错？我在导入我的课在错误的道路？

It shows up like an error: Acess of a possibly undefined property line through a reference with static type Class. I'm not sure what did i do wrong? Am i importing my class in the wrong way?

推荐答案

您应该通过您的镜对象的影片剪辑就像在下面的例子对象：

You should pass your Mirror object to your MovieClips object like in the following example:

package {

    import flash.display.MovieClip;
    import flash.display.Sprite;
    import flash.events.Event;

    public class Main extends Sprite 
    {

        public function Main():void 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);

        }// end function

        private function init(e:Event = null):void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);

            var mirror:Mirror = new Mirror();
            var movieClips:MovieClips = new MovieClips(mirror);

        }// end function

    }// end class

}// end package

import flash.display.MovieClip;

class Mirror extends MovieClip {

    public var line:MovieClip;

    public function Mirror():void {

        line = new MovieClip();

    }// end function

}// end class

class MovieClips extends MovieClip {

    public function MovieClip(mirror:Mirror):void {

        mirror.line;

    }// end function

}// end class

你也可以通过改进此 Mirror.line 只读：

class Mirror extends MovieClip {

    private var _line:MovieClip;

    public function get line():MovieClip {

        return _line;

    }// end function

    public function Mirror():void {

        _line = new MovieClip();

    }// end function

}// end class

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