Loading array of display objects using shared objects in action script 3.0

问题

I'm trying to load an array that contain some display objects, the program lets me to populate the array with circles and save them to a shared object, then, I can trace the content of my array using the load button. The problem is that i can't load the array after that I restart my program. It traces me this message:"objects loaded: ,,,"

This is the code:

var SO:SharedObject=SharedObject.getLocal("myFile", "/");

var arr:Array=new Array();

var counter:Number=-1;

addBtn.addEventListener(MouseEvent.CLICK, addObjects);

saveBtn.addEventListener(MouseEvent.CLICK, saveObjects);

loadBtn.addEventListener(MouseEvent.CLICK, loadObjects);

function addObjects(event:Event) {

    counter++;

    var circle:circleClip=new circleClip();

    arr.push(circle);

    trace("current object: "+arr[counter]);
}

function saveObjects(event:Event) {

    SO.data.arrSaved=arr;

    SO.flush();

    trace("objects saved: "+SO.data.arrSaved);
}

function loadObjects(event:Event) {

    var arrLoaded:Array=new Array();

    arrLoaded=SO.data.arrSaved;

    trace("objects loaded: "+arrLoaded);
}

回答1:

You are to understand MVC pattern approach: https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller

You need to separate data from the code that visualizes things out of these data, and store data only. Something like:

// Lets say this Array contains a list of your circle objects.
var Curcus:Array;

// Storage.
var SO:SharedObject = SharedObject.getLocal("myFile", "/");

function saveCircus():void
{
    var aList:Array = new Array;

    aList.length = Circus.length;

    for (var i:int = 0; i < Curcus.length; i++)
    {
        // Get an object.
        var aCircle:Sprite = Curcus[i];

        // Record its properties you want to store.
        var anEntry:Object =
        {
            "x":aCircle.x,
            "y":aCircle.y,
            "scaleX":aCircle.scaleX,
            "scaleY":aCircle.scaleY
        };

        // Store the entry.
        aList[i] = anEntry;
    }

    // Store and save data.
    SO.data.arrSaved = aList;
    SO.flush();
}

function loadCircus():void
{
    // Retrieve saved data.
    var aList:Array = SO.data.arrSaved;

    // Make it empty data if there are none.
    if (!aList) aList = new Array;

    Circus = new Array;
    Curcus.length = aList.length;

    for (var i:int = 0; i < aList.length; i++)
    {
        // Get one entry.
        var anEntry:Object = aList[i];

        // Create a new item. BTW, naming classes with the
        // lowercase first letter is the 8th cardinal sin.
        var aCircle = new CircleClip;

        // Restore saved properties.
        aCircle.x = anEntry['x'];
        aCircle.y = anEntry['y'];
        aCircle.scaleX = anEntry['scaleX'];
        aCircle.scaleY = anEntry['scaleY'];

        // Add to display list.
        addChild(aCircle);

        // Keep it for the future reference/saving.
        Curcus[i] = aCircle;
    }
}

来源：https://stackoverflow.com/questions/43686854/loading-array-of-display-objects-using-shared-objects-in-action-script-3-0

标签

arrays

actionscript-3

shared-objects

displayobject

adobe-flash-cs3