Flex与JavaScript交互的问题，这里和大家分享一下，主要包括Flex调用JavaScript中的函数和JavaScript调用Flex中的函数两大部分内容。
Flex 与JavaScript 交互，主要依靠Flex的ExternalInterface，其提供了addCallBack和call方法。
一.Html页面嵌套Flex
html嵌套Flex需要用到swfobject.js,下载网址http://code.google.com/p/swfobject/
swfobject.embedSWF(swfUrl, id, width, height, version, expressInstallSwfurl, flashvars, params, attributes)为js加载flex的方法。
详细请看：http://blog.csdn.net/allen_oscar/article/details/9744265
如下：
<!DOCTYPE HTML PUBLICd "-//W3C//DTD HTML 4.000%1 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html ><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>JS与Flex交互</title> <script type="text/javascript" src="lib/interaction.js"></script><script type="text/javascript" src="lib/swfobject.js"></script><script>var jsApp;function init(name){this.name = name;//name="flexDiv" flexDiv为 html页面中 <div id="flexDiv">/div>< 的idvar flashvars = {};var params = {};attributes = {};params.allowScriptAccess = "always";//安全沙箱params.scale = "nocale"; swfobject.embedSWF("http://192.168.1.102:8088/FlexApp/FlexApp.swf", name,"100%","100%", "10.2.0", "", flashvars, params, attributes); }</script></head><body οnlοad="init("flexDiv")" width="100%" height="100%"><div> <label> Flex说：</label> <input id="flexSay" /> <input id="jsinput" value="你好Flex" /> <button >Send</button> </div> <table width="100%" height="100%"><td> <div id="flexDiv" width="100%" height="100%" style="display:block"><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a> </div> </td> </table></body> </html>
二.JavaScript与Flex交互
Flex 与JavaScript 交互，主要依靠Flex的ExternalInterface，其提供了addCallBack和call方法。
ExternalInterface.addCallback("onHello",onHelloFlex);//onHello 为javascript中的方法
ExternalInterface.call("flexCall",flex.text);//调用javascript中的flexCall()方法ExternalInterface还提供了一些其他的方法：
ExternalInterface.available//对浏览器支持的检查
Security.allowDomain("*"); //允许调用SWF文件中的属性和变量
Security.allowInsecureDomain("*"); 三.代码示例
JSApp.html
<!DOCTYPE HTML PUBLICd "-//W3C//DTD HTML 4.000%1 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html ><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>地图接口</title> <script type="text/javascript" src="lib/interaction.js"></script><script type="text/javascript" src="lib/swfobject.js"></script><script>var jsApp;function init(){jsApp = new LoadFlex("flexDiv");//创建对象 }function sendJS(){try{var str = document.getElementById('jsinput').value;jsApp.jsToFlex(str);} catch(e){ alert(e.message);}}</script></head><body οnlοad="init()" width="100%" height="100%"><div> <label> Flex说：</label> <input id="flexSay" /> <input id="jsinput" value="你好Flex" /> <button onClick="sendJS()">Send</button> </div> <table width="100%" height="100%"><td> <div id="flexDiv" width="100%" height="100%" style="display:block"><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a> </div> </td> </table></body> </html>
interaction.js
function LoadFlex(name){this.name = name;var flashvars = {};var params = {};attributes = {};params.allowScriptAccess = "always";params.scale = "nocale"; swfobject.embedSWF("http://192.168.1.102:8088/FlexApp/FlexApp.swf", name,"100%","100%", "10.2.0", "", flashvars, params, attributes); this.GetFlex = function(){var mapName = this.name;if (navigator.appName.indexOf("Microsoft") != -1) {return window[mapName];}else {return document[mapName]; }}this.jsToFlex = function(str){try{var str = this.GetFlex().onHello(str); } catch(e){alert(e.message);} }}function flexCall(str){// alert(str);document.getElementById("flexSay").value =str}FlexApp.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"applicationComplete="init()" creationComplete="oninit()" initialize="oninit()"viewSourceURL="srcview/index.html"><fx:Script><![CDATA[import flash.external.ExternalInterface;import flash.system.Security;import mx.controls.Alert;import mx.events.FlexEvent; public function oninit():void{}public function init():void{Security.allowDomain("*"); //允许调用SWF文件中的属性和变量Security.allowInsecureDomain("*"); if (ExternalInterface.available){try{ExternalInterface.addCallback("onHello",onHelloFlex);//onHello 为javascript中的this.GetFlex().onHello(str); }catch(error:Error){Alert.show(error.message);}} }public function onHelloFlex(str:String):String{js.text = str;return "你好javaScript";}public function onFlexToJS(ste:String):void{ExternalInterface.call("flexCall",flex.text);//调用javascript中的flexCall()方法} ]]></fx:Script><fx:Declarations><!-- 将非可视元素（例如服务、值对象）放在此处 --></fx:Declarations><mx:VBox width="100%" height="100%" horizontalAlign="left" verticalAlign="middle" backgroundColor="#EAE3E3"><s:Panel width="100%" height="500" chromeColor="#1E1E1E" title="javascript and flex 交互" color="#FCF9F9" fontWeight="bold" fontSize="14"><mx:VBox height="100%" width="100%"><mx:HBox height="100%"><mx:HBox width="270" height="200" paddingTop="10"><s:Label color="#080808">javaScript说：</s:Label> <s:TextInput id="js" color="#020202"/> </mx:HBox><mx:HBox width="380" height="200" paddingTop="10"><s:Label color="#060606">Flex说：</s:Label> <s:TextInput text="你好javaScript" id="flex" color="#020202"/><mx:Button click="onFlexToJS('hell')" label="send"/></mx:HBox></mx:HBox></mx:VBox> </s:Panel> </mx:VBox></mx:Application>
四：图片示例
1.初始化页面
2.点击html页面Send,通过调用this.GetFlex().onHello(str);方法-----》ExternalInterface.addCallback("onHello",onHelloFlex)---》public function onHelloFlex(str:String):String。
3.点击flex页面Send，public function onFlexToJS(ste:String):void--》ExternalInterface.call("flexCall",flex.text)--》function flexCall(str)。
