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November 14

Flex嵌套HTML框架处理心得

功能描述：在Flex中嵌套框架，并且进行数值传递

１、编辑Flex框架组件iFrame.mxml

<?xml version="1.0" encoding="utf-8"?>

<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"
resize="callLater(moveIFrame)"
move="callLater(moveIFrame)">

<mx:Script>
<![CDATA[

        import flash.external.ExternalInterface;
        import flash.geom.Point;
        import flash.net.navigateToURL;

private var __source: String;

        /**
         * Move iframe through ExternalInterface. The location is determined using localToGlobal()
         * on a Point in the Canvas.
         **/
        private function moveIFrame(): void
        {

var localPt:Point = new Point(0, 0);
var globalPt:Point = this.localToGlobal(localPt);

ExternalInterface.call("moveIFrame", globalPt.x, globalPt.y, this.width, this.height);
}

        /**
         * The source URL for the IFrame. When set, the URL is loaded through ExternalInterface.
         **/
        public function set source(source: String): void
        {
            if (source)
            {

                if (! ExternalInterface.available)
                {
                    throw new Error("ExternalInterface is not available in this container. Internet Explorer ActiveX, Firefox, Mozilla 1.7.5 and greater, or other browsers that support NPRuntime are required.");
                }
                __source = source;
                ExternalInterface.call("loadIFrame", source);
                moveIFrame();
            }
        }

        public function get source(): String
        {
            return __source;
        }

        /**
         * Whether the IFrame is visible.
         **/
        override public function set visible(visible: Boolean): void
        {
            super.visible=visible;

            if (visible)
            {
                ExternalInterface.call("showIFrame");
            }
            else
            {
                ExternalInterface.call("hideIFrame");
            }
        }

]]>
</mx:Script>

</mx:Canvas>

２、放置到要使用框架的Flex中index.mxml，并写入引用哪个frame.html

<ui:IFrame id="iFrame" source="frame.html" visible="true" width="100%" height="300"/>

３、在引用框架的Flex生成页index.html里加入：

<1. wmode set to opaque

在调用swf的后面加上"wmode","opaque"

例如："pluginspage", "http://www.adobe.com/go/getflashplayer",

"wmode","opaque"
<2. the moveIFrame,hideIFrame,showIFrame,loadIFrame methods

<script language="JavaScript" type="text/javascript">


function moveIFrame(x,y,w,h) {
    var frameRef=document.getElementById("myFrame");
    frameRef.style.left=x;
    frameRef.style.top=y;
    var iFrameRef=document.getElementById("myIFrame");
     iFrameRef.width=w;
     iFrameRef.height=h;
}

function hideIFrame(){
    document.getElementById("myFrame").style.visibility="hidden";
}

function showIFrame(){
    document.getElementById("myFrame").style.visibility="visible";
}

function loadIFrame(url){
     document.getElementById("myFrame").innerHTML = "<iframe id='myIFrame' src='" + url + "'frameborder='0'></iframe>";
}

//要调用的内容，加载前三个就可以了，后面这个函数是用来调用返回值

function getEditorText(){
     return document.getElementById("myIFrame").contentWindow.GetEditorText1();
}

</script>

<3. the 'myFrame' div

在</body>这前写入：

４、在Flex页面index.mxml输入的函数值,调用index.html中的'getEditorText'函数，并且写入到text1.text中

text1.text=ExternalInterface.call('getEditorText',param1,param2,param3,...)

getEditorText:函数名称

param:参数值

５、在生成页中取得框架中的函数

框架内的frame.html，放置在head之间:

function GetEditorText1(){
return getHTML(params);

index.html生成页的调用，设置在head之间：

    function getEditorText(){
     return document.getElementById("myIFrame").contentWindow.GetEditorText1();
    }

后记：实际中在这里只是调用一个层放在对应位置而已，当我们在Flex中做申缩动作时，层也要跟着改变，我是如此处理的：

设置move或show事件，当move或show时则调用：iFrame.source = "frame.html"

参考：

http://www.cnflex.cn/html/mxml/20070321/95.html

http://www.cnblogs.com/dannyr/archive/2004/11/24/68026.aspx

http://renaun.com/flex2/posts/flexsearch/index.html（有源码下载）