Flex-动态加载SWF文件并获取对象类

转载于 2019-08-13 00:14:03 发布 · 153 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/jssy/archive/2007/09/09/887815.html

本文档提供了一个使用Flex的详细示例，展示了如何在应用程序中加载外部SWF文件并获取类定义。通过实例代码，作者解释了如何处理加载过程中的各种事件，如加载完成、I/O错误和安全错误。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

示例
关键代码：

1 <? xml version="1.0" encoding="utf-8" ?>
  2 
16 < mx:Application xmlns:mx ="http://www.adobe.com/2006/mxml" layout ="vertical"
viewSourceURL ="srcview/index.html" >
17
18      < mx:creationComplete >
19          <![CDATA[
20             initApp();
21          ]]>
22      </ mx:creationComplete >
23
24      < mx:Script >
25          <![CDATA[
26             import flash.utils.describeType;
27             import mx.controls.Alert;
28
29
30             private var ld:Loader;
31
32             private function initApp():void
33             {
34                 ld = new Loader();
35                 ld.contentLoaderInfo.addEventListener(Event.COMPLETE,loadCompleted);
36                 ld.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR,ioErrHandler);
37                 ld.contentLoaderInfo.addEventListener(
SecurityErrorEvent.SECURITY_ERROR,securityErrHandler);
38             }
39
40             private function loadSWF():void
41             {
42                 var sSWF:String = txtURL.text;
43                 var req:URLRequest = new URLRequest(sSWF);
44                 var context:LoaderContext = new LoaderContext(false,
ApplicationDomain.currentDomain,null);
45                 req.contentType = "";
46                 ld.load(req,context);
47             }
48
49             private function getDef():void
50             {
51                 var cls:Class = loadClassDefinition(txtClassName.text);
52                 if(cls){
53                     var obj:Object = new cls();
54                     txtDump.text = flash.utils.describeType(obj).toString();
55                 }
56             }
57
58             private function loadCompleted(e:Event):void
59             {
60                 Alert.show("[" + e.target.url + "] loaded");
61             }
62
63             private function ioErrHandler(e:IOErrorEvent):void
64             {
65                 Alert.show(e.text);
66             }
67
68             private function securityErrHandler(e:IOErrorEvent):void
69             {
70                 Alert.show(e.text);
71             }
72
73             private function loadClassDefinition(sClassName:String):Class
74             {
75                 var cls:Class = null;
76                 try{
77                     cls = ld.contentLoaderInfo.applicationDomain.
getDefinition(sClassName) as Class;
78                     return cls;
79                 }catch(e:Error){
80                     throw new IllegalOperationError(sClassName + " doesn't exist");
81                 }
82                 return cls;
83             }
84
85
86          ]]>
87      </ mx:Script >
88
89      < mx:Label text ="A sample of describing class definition " fontWeight ="bold" fontSize ="16" />
90      < mx:HRule width ="100%" height ="40" />
91      < mx:HBox width ="100%" >
92          < mx:TextInput id ="txtURL" text =
"http://Shigeru-Nakagaki.com/flex_samples/ApplicationDomain/getDefinitionDump
/RunTimeClass03/RunTimeClass03.swf" width ="400" />
93          < mx:Button x ="10" y ="10" label ="Load SWF" click ="loadSWF()" />
94      </ mx:HBox >
95      < mx:HBox width ="100%" >
96          < mx:TextInput id ="txtClassName" text ="org.Pepe.ExPanel" width ="400" />
97          < mx:Button x ="10" y ="40" label ="Get Definition" click ="getDef()" />
98      </ mx:HBox >
99      < mx:HBox width ="100%" height ="90%" >
100          < mx:TextArea id ="txtDump" width ="100%" height ="100%" />
101      </ mx:HBox >
102
103 </ mx:Application >
104
105

转载于:https://www.cnblogs.com/jssy/archive/2007/09/09/887815.html