actionscript 和JavaScript 通信

本文主要是介绍actionscript 和JavaScript 通信，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

ExternalInterface 类是外部 API，这是一个在 ActionScript 和 Flash Player 容器之间实现直接通信的应用程序编程接口，例如，包含 JavaScript 的 HTML 页。Adobe 建议使用 ExternalInterface 实现 JavaScript 与 ActionScript 之间的所有通信。
在 Flash Player 中，可以使用 HTML 页中的 JavaScript 来调用 ActionScript 函数。ActionScript 函数可以返回一个值，JavaScript 会立即接收它作为该调用的返回值。

addCallback(functionName:String, closure:Function) 将 ActionScript 方法注册为可从容器调用。

call(functionName:String, ... arguments) 调用由 Flash Player 容器公开的函数，不传递参数或传递多个参数。

actionscript code：

package com.adobe.cairngorm.util
{
    import flash.display.Sprite;
    import flash.events.*;
    import flash.external.ExternalInterface;
    import flash.text.TextField;
    import flash.utils.Timer;
    import flash.text.TextFieldType;
    import flash.text.TextFieldAutoSize;

    public class ExternalInterfaceExample extends Sprite {
        private var input:TextField;
        private var output:TextField;
        private var sendBtn:Sprite;

        public function ExternalInterfaceExample() {
            input = new TextField();
            input.type = TextFieldType.INPUT;
            input.background = true;
            input.border = true;
            input.width = 350;
            input.height = 18;
            addChild(input);

            sendBtn = new Sprite();
            sendBtn.mouseEnabled = true;
            sendBtn.x = input.width + 10;
            sendBtn.graphics.beginFill(0xCCCCCC);
            sendBtn.graphics.drawRoundRect(0, 0, 80, 18, 10, 10);
            sendBtn.graphics.endFill();
            sendBtn.addEventListener(MouseEvent.CLICK, clickHandler);
            addChild(sendBtn);

            output = new TextField();
            output.y = 25;
            output.width = 450;
            output.height = 325;
            output.multiline = true;
            output.wordWrap = true;
            output.border = true;
            output.text = "Initializing...\n";
            addChild(output);

            if (ExternalInterface.available) {
                try {
                    output.appendText("Adding callback...\n");
                    ExternalInterface.addCallback("sendToActionScript", receivedFromJavaScript);
                    if (checkJavaScriptReady()) {
                        output.appendText("JavaScript is ready.\n");
                    } else {
                        output.appendText("JavaScript is not ready, creating timer.\n");
                        var readyTimer:Timer = new Timer(100, 0);
                        readyTimer.addEventListener(TimerEvent.TIMER, timerHandler);
                        readyTimer.start();
                    }
                } catch (error:SecurityError) {
                    output.appendText("A SecurityError occurred: " + error.message + "\n");
                } catch (error:Error) {
                    output.appendText("An Error occurred: " + error.message + "\n");
                }
            } else {
                output.appendText("External interface is not available for this container.");
            }
        }
        private function receivedFromJavaScript(value:String):void {
            output.appendText("JavaScript says: " + value + "\n");
        }
        private function checkJavaScriptReady():Boolean {
            var isReady:Boolean = ExternalInterface.call("isReady");
            return isReady;
        }
        private function timerHandler(event:TimerEvent):void {
            output.appendText("Checking JavaScript status...\n");
            var isReady:Boolean = checkJavaScriptReady();
            if (isReady) {
                output.appendText("JavaScript is ready.\n");
                Timer(event.target).stop();
            }
        }
        private function clickHandler(event:MouseEvent):void {
            if (ExternalInterface.available) {
                ExternalInterface.call("sendToJavaScript", input.text);
            }
        }
    }
}

html code：

<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>ExternalInterfaceExample</title>
<script language="JavaScript">
     var jsReady = false;
     function isReady() {
         return jsReady;
     }
     function pageInit() {
         jsReady = true;
         document.forms["form1"].output.value += "\n" + "JavaScript is ready.\n";
     }
     function thisMovie(movieName) {
         if (navigator.appName.indexOf("Microsoft") != -1) {
             return window[movieName];
         } else {
             return document[movieName];
         }
     }
     function sendToActionScript(value) {
         thisMovie("ExternalInterfaceExample").sendToActionScript(value);
     }
     function sendToJavaScript(value) {
         document.forms["form1"].output.value += "ActionScript says: " + value + "\n";
     }
</script>
</head>
<body οnlοad="pageInit();">

     <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
             id="ExternalInterfaceExample" width="500" height="375"
             codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">
         <param name="movie" value="ballProjFlex/asWithJs.swf" />
         <param name="quality" value="high" />
         <param name="bgcolor" value="#869ca7" />
         <param name="allowScriptAccess" value="sameDomain" />
         <embed src="ballProjFlex/asWithJs.swf" quality="high" bgcolor="#869ca7"
             width="500" height="375" name="ExternalInterfaceExample" align="middle"
             play="true" loop="false" quality="high" allowScriptAccess="sameDomain"
             type="application/x-shockwave-flash"
             pluginspage="http://www.macromedia.com/go/getflashplayer">
         </embed>
     </object>

     <form name="form1" οnsubmit="return false;">
         <input type="text" name="input" value="" />
         <input type="button" value="Send" οnclick="sendToActionScript(this.form.input.value);" /><br />
         <textarea cols="60" rows="20" name="output" readonly="true">Initializing...</textarea>
     </form>

</body>
</html>