AS3 SWF not loading

Question

我已经生成了一个类来加载和卸载SWF，但是，它似乎没有加载swf可视化，但它也不会返回任何错误。

父代码：

//specify the path for the child SWF 
    var PageURL:URLRequest = new URLRequest("home/home_index.swf"); 

//include the SWF loading class 
import MM_swfloader; 
var mainPage:MM_swfloader = new MM_swfloader(); 
//evoke the load 
mainPage.LoadSWF(PageURL); 

MM_swfloader类：

package { 

import flash.display.Loader; 
import flash.display.Sprite; 
import flash.events.Event; 
import flash.net.URLRequest; 
/** 
* author: Me 
* email: lala@lala.com 
**/ 

public class MM_swfloader extends Sprite { 

    public var loader:Loader = new Loader(); 
    public function MM_swfloader():void 
    { 
     // constructor code 
    } 

    public function LoadSWF(val:URLRequest):void{ 
     var loader:Loader = new Loader(); 
     loader.load(val); 
     addChild(loader); 
trace("loaded"); //returns true 
    } 

    public function UnLoadSWF():void { 
     loader.unload(); 
    } 

    } 

} 

我不明白的地方加载的SWF被载入。有任何想法吗？

Answer 1

您需要将SWF加载class的instance添加到舞台父class：

//specify the path for the child SWF 
var PageURL:URLRequest = new URLRequest("home/home_index.swf"); 

//include the SWF loading class 
import MM_swfloader; 
var mainPage:MM_swfloader = new MM_swfloader(); 
// add the instance to the stage 
this.addChild(mainPage); 
//evoke the load 
mainPage.LoadSWF(PageURL); 

您的装载机class中的代码也存在一些问题，我在下面解决了这个问题（请参阅注释以获得解释）：

// Poor practice to use the default namespace, stick it in com.lala 
package { 

import flash.display.Loader; 
import flash.display.Sprite; 
import flash.events.Event; 
import flash.net.URLRequest; 
/** 
* author: Me 
* email: lala@lala.com 
**/ 

public class MM_swfloader extends Sprite { 

    public var loader:Loader = new Loader(); 

    public function MM_swfloader():void 
    { 
     // constructor code 

     // listen for loader complete on the loader instance 
     loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaderCompleteHandler); 

     // add loader to stage 
     this.addChild(loader); 
    } 

    // Note that by convention loadSWF would be a better name for this method 
    public function LoadSWF(val:URLRequest):void { 
     // commented out to avoid creating a new locally-scoped 
     // loader each time the method is called 
     //var loader:Loader = new Loader(); 

     loader.load(val); 

     // commented out to avoid adding child each time 
     // method is called, added in constructor instead 
     //addChild(loader); 

     // loading is asynchronous, this needs to be in a handler 
     // for the loader.complete event 
     //trace("loaded"); //returns true 
    } 

    // call this unloadSWF 
    public function UnLoadSWF():void { 
     loader.unload(); 
    } 

    // handler for loader.complete event 
    private function loaderCompleteHandler(event:Event):void { 
     trace("loaded"); 
    } 
    } 
} 

Answer 2

你需要加载的内容添加到舞台上完成，像这样：

import flash.net.URLRequest; 
import flash.display.Loader; 
import flash.events.Event; 
import flash.events.ProgressEvent; 

function startLoad() 
{ 
var mLoader:Loader = new Loader(); 
var mRequest:URLRequest = new URLRequest("someswf.swf"); 
mLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, onCompleteHandler); 
mLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, onProgressHandler); 
mLoader.load(mRequest); 
} 

function onCompleteHandler(loadEvent:Event) 
{ 
     addChild(loadEvent.currentTarget.content); 
} 
function onProgressHandler(mProgress:ProgressEvent) 
{ 
var percent:Number = mProgress.bytesLoaded/mProgress.bytesTotal; 
trace(percent); 
} 
startLoad();