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id
var 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 onload="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 onload="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)。
