用Flash中的新显示对象替换显示对象

Question

我正在创建一个Flash影片，该影片会加载一些XML，其中包含某些文字和图片网址的详细信息，需要替换Flash影片中的现有MovieClip。

在Flash中是否有办法替换现有的MovieClip或更新它以使更新的/新的显示对象保持原始显示对象的原始外观，并且原始显示对象的任何补间仍然有效我们新的或更新的显示对象。

由于

斯蒂芬

更新：这是我用来加载它的代码：

---

import flash.events.IOErrorEvent;
import flash.net.URLLoader;
import flash.net.URLRequest;
import flash.events.Event;
import flash.display.DisplayObject;
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.display.Loader;
import flash.text.TextField;
import flash.events.ProgressEvent;


// get the number of children in display list
var count:uint = numChildren;

// get the url for the Ceres server
//var configUrl:String = loaderInfo.parameters.configUrl;

// load the config file from the server using the configUrl
var configUrl:String = "C:\development\projects\ReadXMLInFlash\example_xml_ceres_response.xml";   //loaderInfo.parameters.configFileUrl;
var defaultImgUrl:String = loaderInfo.parameters.defaultImgUrl;
var urlRequest:URLRequest = new URLRequest( configUrl );

// create the XML loader
var urlLoader:URLLoader = new URLLoader();
urlLoader.load( urlRequest );
urlLoader.addEventListener(Event.COMPLETE, onDataLoaded);
//Error handling    ;
urlLoader.addEventListener(IOErrorEvent.IO_ERROR, onIOError);
urlLoader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, onSecurityError);
//Could be an error or just a message;
urlLoader.addEventListener(HTTPStatusEvent.HTTP_STATUS, onHTTPStatus);

function onDataLoaded(evt:Event):void
{
    var myXML:XML = new XML(evt.target.data);
    var node:XML;
    // loop through the XML
    for each (node in myXML.dynamicGroups.DynamicGroup.assets.Asset.elements.Element)
    {
        // check the assetValue of the XML, if contains http then a link use 'createNewImageLoader'
        if(String(node.assetTagName) == 'Image' )
        {
            createNewImageLoader( node.assetValue, node.elementName );
        }
        else
        {
            // else it is text (e.g. a product descrition) use createNewTextLoader
            createNewTextLoader( node.assetValue, node.elementName );
        }

    }

}

//error callbacks
function onIOError(evt:IOErrorEvent)
{
    trace("IOError: "+evt.text);
    // if an error load the default image
    var defaultImgLoader:Loader = new Loader();
    var defaultImgUrl:URLRequest = new URLRequest( defaultImgUrl );
    defaultImgLoader.load( defaultImgUrl );
    addChild( defaultImgLoader );

}
function onHTTPStatus(evt:HTTPStatusEvent)
{
    //trace("HTTPStatus: "+evt.status);
}
function onSecurityError(evt:SecurityErrorEvent)
{
    trace("SecurityError: "+evt.text);
}

// loads a image asset
function createNewImageLoader(loadURL:String, elementname:String):void
{
    for(var i:uint=0;i<numChildren;i++)
    {
        var display:DisplayObject = getChildAt(i);
        if (elementname == display.name)
        {
            var loader:Loader = new Loader();
            var urlRequest:URLRequest = new URLRequest(loadURL);
            loader.addEventListener(Event.COMPLETE, function(){
                                    loader.x = display.x;
                                    loader.y = display.y;
                                    addChild( loader );
                                    removeChild(display);
                                    });
            loader.load( urlRequest );

        }
    }
}
// adds new text to a display object
function createNewTextLoader( textToLoad:String, elementname:String):void
{
    trace( "elementname:" + elementname );

    for(var i:uint=0;i<count;i++)
    {
        var display:DisplayObject = getChildAt(i);

        trace( "displayName:" + display.name );
        if (elementname == display.name)
        {
            var textToDisplay:TextField = new TextField();
            textToDisplay.text = textToLoad;
            textToDisplay.x = display.x;
            textToDisplay.y = display.y;
            addChild(textToDisplay);
            removeChild(display);
            break;
        }
    }
}

Answer 1

我不确定你的问题是什么，或者你想要达到的目标，但我会尽力回答你的问题。

根据我在评论和您的代码中所读到的内容，您要做的是更改movieclip中的文本和图像。要执行此操作，只需更改此代码：

function createNewTextLoader( textToLoad:String, elementname:String):void
{
    trace( "elementname:" + elementname );

    for(var i:uint=0;i<count;i++)
    {
        var display:DisplayObject = getChildAt(i);

        trace( "displayName:" + display.name );
        if (elementname == display.name)
        {
            var textToDisplay:TextField = new TextField();
            textToDisplay.text = textToLoad;
            textToDisplay.x = display.x;
            textToDisplay.y = display.y;
            addChild(textToDisplay);
            removeChild(display);
            break;
        }
    }
}

为：

function createNewTextLoader( textToLoad:String, elementname:String):void
{
// If the display object by the name of the value of "elementname" exists and it is a text field
    if (getChildByName(elementname) != undefined &&
        getChildByName(elementname) is TextField)
    {
        var textToDisplay:TextField = (TextField)getChildByName(elementname);// I dont know if you need a cast here but just in case
        textToDisplay.text = textToLoad;// change the text in the text field
    }
}

并替换它：

function createNewImageLoader(loadURL:String, elementname:String):void
{
    for(var i:uint=0;i<numChildren;i++)
    {
        var display:DisplayObject = getChildAt(i);
        if (elementname == display.name)
        {
            var loader:Loader = new Loader();
            var urlRequest:URLRequest = new URLRequest(loadURL);
            loader.addEventListener(Event.COMPLETE, function(){
                                    loader.x = display.x;
                                    loader.y = display.y;
                                    addChild( loader );
                                    removeChild(display);
                                    });
            loader.load( urlRequest );
        }
    }
}

用这个：

function createNewImageLoader(loadURL:String, elementname:String):void
{
    if (getChildByName(elementname) != undefined &&
        getChildByName(elementname) is Loader)
    {
        var loader:Loader = (Loader)(getChildByName(elementname);
        var urlRequest:URLRequest = new URLRequest(loadURL);
        loader.load( urlRequest );
    }
}

我还没有真正测试过这些代码，但很难说我是否回答了正确的问题。

Answer 2

我真的不明白为什么你已经在舞台上安装了MC并且在加载XML之后必须更新它们...你不能在加载XML之后创建它们吗？

在这两种情况下，最好创建两个自己的类（MovieClip的子类）：TextLoader和ImageLoader以及更新方法。

package   
{
    import flash.display.MovieClip;

    public class TextLoader extends MovieClip 
    {
        private var _txt:TextField;

        public function TextLoader() 
        {
            _txt = new TextField();
            // do TextFormat stuff, set size and position of _txt
            addChild(_txt);

            // you could also set some initial text like:
            _txt.text = "loading ...";
            // this will be overwritten later
        }

        public function update(label:String):void 
        {
            _txt.text = label;
        }
    }
}

ImageLoader也会如下所示，而不是TextField获得了通过update(url:String)方法更新的Loader。

在加载XML之前创建MC，如下所示：

var allTxts:Array = [];
for (var i:int=0;i<10;++i)
{
    var txt:TextLoader = new TextLoader();
    txt.x = 50;
    txt.y = (i+1) * 50;
    txt.name = "txt_" + i;  // the names you got in your xml
    addChild(txt);

    allTxts.push(txt);
}

加载XML时，更新所有MC：

function getTxtWithName(name:String):TextLoader
{
    for (var i:int=0;i<allTxts.length;++i)
    {
        var txt:TextLoader = allTxts[i] as TextLoader;
        if (txt != null && txt.name == name)
        {
            return txt;
        }
    }
    return null;
}

function onDataLoaded(evt:Event):void
{
    var myXML:XML = new XML(evt.target.data);
    var node:XML;
    // loop through the XML
    for each (node in myXML.dynamicGroups.DynamicGroup.assets.Asset.elements.Element)
    {
        // check the assetValue of the XML, if contains http then a link use 'createNewImageLoader'
        if(String(node.assetTagName) == 'Image' )
        {
            var txt:TextLoader = getTxtWithName(node.elementName);
            if (txt != null)
            {
                txt.update(node.assetValue);
            }
        }
        else
        {
            // else it is text (e.g. a product descrition) use createNewTextLoader
            var img:ImageLoader = getImageWithName(node.elementName);
            if (img != null)
            {
                img.update(node.assetValue);
            }
        }
    }
}