和加载的对象之间进行通信例子

flashone.as


 package {
    import flash.display.Loader;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.events.StatusEvent;
    import flash.net.LocalConnection;
    import flash.net.URLRequest;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.text.TextFieldType;
    import flash.display.DisplayObject;

    public class FlashOne extends Sprite {
        private var conn:LocalConnection;
        
        private var loadFlashTow:Loader;
        
        // UI elements
         private var messageLabel:TextField;
        private var message:TextField;
        private var sendBtn:Sprite;
        
        public function FlashOne() {
        
        this.loadFlashTow=new Loader();
        this.loadFlashTow.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler);
        this.loadFlashTow.y=100;
        this.loadFlashTow.x=100;
        this.loadFlashTow.load(new URLRequest("FlashTow.swf"));
            
            buildUI();
            sendBtn.addEventListener(MouseEvent.CLICK, sendMessage);
            conn = new LocalConnection();
            conn.addEventListener(StatusEvent.STATUS, onStatus);
        }
        
        private function sendMessage(event:MouseEvent):void {
            conn.send("myConnection", "lcHandler", message.text);
        }
        
        private function onStatus(event:StatusEvent):void {
            switch (event.level) {
                case "status":
                    trace("LocalConnection.send() succeeded");
                    break;
                case "error":
                    trace("LocalConnection.send() failed");
                    break;
            }
        }
        private function completeHandler(event:Event){
   var _content:DisplayObject = event.target.content;
   this.addChild(loadFlashTow);
   }
        
        
        private function buildUI():void {
            const hPadding:uint = 5;
            // messageLabel
             messageLabel = new TextField();
            messageLabel.x = 10;
            messageLabel.y = 10;
            messageLabel.text = "Text to send:";
            messageLabel.autoSize = TextFieldAutoSize.LEFT;
            addChild(messageLabel);
            
            // message
             message = new TextField();
            message.x = messageLabel.x + messageLabel.width + hPadding;
            message.y = 10;
            message.width = 120;
            message.height = 20;
            message.background = true;
            message.border = true;
            message.type = TextFieldType.INPUT;
            addChild(message);
            
            // sendBtn
             sendBtn = new Sprite();
            sendBtn.x = message.x + message.width + hPadding;
            sendBtn.y = 10;
            var sendLbl:TextField = new TextField();
            sendLbl.x = 1 + hPadding;
            sendLbl.y = 1;
            sendLbl.selectable = false;
            sendLbl.autoSize = TextFieldAutoSize.LEFT;
            sendLbl.text = "Send";
            sendBtn.addChild(sendLbl);
            sendBtn.graphics.lineStyle(1);
            sendBtn.graphics.beginFill(0xcccccc);
            sendBtn.graphics.drawRoundRect(0, 0, (sendLbl.width + 2 + hPadding + hPadding), (sendLbl.height + 2), 5, 5);
            sendBtn.graphics.endFill();
            addChild(sendBtn);
        }
    }
}

flashtow.as


package {
    import flash.display.Sprite;
    import flash.net.LocalConnection;
    import flash.text.TextField;

    public class FlashTow extends Sprite {
        private var conn:LocalConnection;
        private var output:TextField;
        
        public function FlashTow()     {
            buildUI();
            
            conn = new LocalConnection();
            conn.client = this;
            try {
                conn.connect("myConnection");
            } catch (error:ArgumentError) {
                trace("Can't connect...the connection name is already being used by another SWF");
            }
        }
        
        public function lcHandler(msg:String):void {
            output.appendText(msg + "\n");
        }
        
        private function buildUI():void {
            output = new TextField();
            output.background = true;
            output.border = true;
            output.wordWrap = true;
            addChild(output);
        }
    }
}