用闪存中的新显示对象替换显示对象

Question

我正在创建一个Flash影片，用于加载一些包含某些文本和图像URL的细节的XML，该影片需要替换Flash影片中现有的MovieClip。

有没有在Flash中替换现有MovieClip或更新它的方法，以便更新的/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建或更新的显示对象。

感谢

斯蒂芬

更新：这里是我用来加载此代码：

---

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

我真的不知道你的问题是什么，或者你试图达到什么目的，但我会尽我所能回答你的问题。

从我在评论和你的代码中看到的内容，你试图做的是改变一个movieclip里面的文本和图像。要做到这一点只是更改此代码：

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; 
     } 
    } 
} 

到：

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 
    } 
} 

和替换这样的：

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); 
     } 
    } 
} 

与此：

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); 
    } 
} 

我还没有实际测试了这些代码的任何一个，但很难说我是否甚至回答正确的问题。

Answer 2

我真的不明白为什么你已经有舞台上的MC，并且必须在加载XML之后更新它们......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使用更新方法。

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的也应该是这样的，而是在文本字段中得到了通过update(url:String)方法更新装载机。

加载XML这样之前创建的MC：

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); 
} 

当XML被加载，更新所有司仪：

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); 
      } 
     } 
    } 
}