Using LocalConnection to communicate between two Flex applications-优快云博客

早期采用计划的一些客户询问同一机器上两个Flex应用程序能否通信，答案是肯定的。LocalConnection类可让一个Flex应用向同一机器上的另一个Flex应用发送数据并触发事件，文中给出了简单示例及代码亮点说明。

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Several Customers in the Early Adopter Program have asked me if two Flex applications running on the same machine can communicate with each other. The answer is yes: the LocalConnection class allows a Flex application to send data to- and trigger events in another Flex application running on the same machine. Here is a simple example:

1. "Sending" Application (Run it!)

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

<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml" initialize="initialize()">

    <mx:Script>

        var myConnection;

        function initialize() {
            myConnection = new LocalConnection();
            myConnection.onStatus = mx.utils.Delegate.create(this, onStatus);
        }

        function sendMessage() {
            myConnection.send("application_b", "messagePosted", myMessage.text);
        }

        function onStatus(result) {
            status.text=result.level == "error"?"Operation failed":"Operation succeeded";
        }

    </mx:Script>

    <mx:TextInput id="myMessage" />
    <mx:Button click="sendMessage()" label="Send"/>
    <mx:Label id="status"/>

</mx:Application>

Code highlights:

myConnection = new LocalConnection();
Create an instance of the LocalConnection class
myConnection.onStatus = mx.utils.Delegate.create(this, onStatus);
The onStatus event is triggered after the send() method is invoked to allow you to respond to the success or failure of the operation
myConnection.send("receivingapp", "messagePosted", myMessage.text);
"reveivingapp" is the name the receiving app used to connect
"messagePosted" is the event to trigger in the receiving application
myMessage.text is the data to pass to the receiving application. You can pass objects or multiple comma-separated values.

2. "Receiving" Application ( Run it!)

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

<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml" initialize="initialize()">

    <mx:Script>

        var myConnection;

        function initialize() {
            myConnection = new LocalConnection();
            myConnection.messagePosted = mx.utils.Delegate.create(this, messagePosted);
            myConnection.connect("receivingapp");
        }

        function messagePosted(message) {
            messageList.text+=message+"/n";
        }

    </mx:Script>

    <mx:TextArea id="messageList" width="300" height="300"/>

</mx:Application>

Code Highlights

myConnection = new LocalConnection();
Create an instance of the LocalConnection class
myConnection.messagePosted = mx.utils.Delegate.create(this, messagePosted);
Delegate messagePosted to the messagePosted function
myConnection.connect("receivingapp");
Connect using "receivingapp" as the connection name