AS3范围问题 [英] AS3 Scope Issue

问题描述

我有一个问题，范围在Flash中创建一个类。我创造，利用XML创建一个信息数组，我会处理和重新保存为XML的应用程序。

I am having an issue with scope in a class created in flash. I am creating an application that utilizes XML to create an array of information that I will manipulate and re-save to XML.

我有一个呼吁呼吁，我使用加载XML，将其转换成一个数组，并使用方法数组返回文档构造另一个类文档类。我已经成功地解析XML并创建数据的一个数组，但似乎无法通过loadXMLData类中的processXML函数的数据添加到阵列中。

I have a document class that is calling calling another class that I am using to load the XML, convert it into an array and return the array to the document constructor using a method. I have successfully parsed the XML and created an array of the data but can't seem to add data to the array via the processXML function inside the loadXMLData class.

我去掉了所有的东西从code无所谓。这里是什么，我试图做基本的重新presentation。

I stripped out all the stuff from the code that doesn't matter. Here is the basic representation of what i am trying to do.

我的文档类

package  {

    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.utils.*;


    public class dashBoard extends MovieClip {

        public var newData

        //initialize the dashBoard
        public function dashBoard(){

            //construct the Dashboard Object
            trace("Dashboard Initialized");
            trace("|--------------XML Data--------------|");
            newData = new loadXMLData();
            trace(newData.getSections());


        }

    }

}

我的loadXMLData类

My loadXMLData Class

 package  {

        import flash.display.MovieClip;
        import flash.events.Event;
        import flash.net.URLLoader;
        import flash.net.URLRequest;
        import flash.utils.*;

        public class loadXMLData extends MovieClip {

                //initialize an array that will be used in the document class
                public var sectionList:Array = new Array();

                public function loadXMLData() { 

                    //load the xml file containing the data
                    var myLoader = new URLLoader();
                    myLoader.load(new URLRequest("dashboard.xml"));
                    myLoader.addEventListener(Event.COMPLETE, processXML); 

                function processXML(e:Event):void {

                     //process the xml file after it loads
                             //and create an object
                     var newXML:XML = new XML(e.target.data);

                             //then I use the XML to populate my 
                             //array i declared at the top
                             //this is a simple test
                             sectionList[0] = "test";

                }

            }

                //and this is the method i use in the document class
                //to get the sectionList array
            public function getSections():Array{
                 return sectionList;
                }

        }

    }

看来pretty的简单，但我似乎无法编辑阵列。该文档类总是返回一个空数组。任何想法？

It seems pretty straightforward but I can't seem to edit the array. The document class always returns a blank array. Any Ideas?

推荐答案

您尝试访问尚不exist.Dispatch事件在 loadXMLData.processXML（）时，XML已经装载完毕，像这样的功能：

You're trying to access information that doesn't yet exist.Dispatch an event in your loadXMLData.processXML() function when the XML has finished loading, like so:

function processXML(e:Event):void
{

    //process the xml file after it loads
    //and create an object
    var newXML:XML = new XML(e.target.data);

    dispatchEvent(new Event("xml_loaded"));

}

后来听吧，你做这样的事情之前：

Then listen for it before you do anything like this:

package
{
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.utils.*;


    public class dashBoard extends MovieClip
    {

        public var newData:loadXMLData;

        //initialize the dashBoard
        public function dashBoard(){

            //construct the Dashboard Object
            trace("Dashboard Initialized");
            newData = new loadXMLData();

            newData.addEventListener("xml_loaded", _xmlLoaded);
        }

        private function _xmlLoaded(e:Event):void
        {
            trace("|--------------XML Data--------------|");
            trace(newData.getSections());
            newData.removeEventListener("xml_loaded", _xmlLoaded);
        }
    }
}

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