flex是否有主电影的onclose/ononload活动?

我不相信有,但我认为你无论如何都可以强制关闭。

不完全确定这会有多简单,但这里是我最好的猜测。在实例化本地连接时,请确保将其包含在客户端中(或作为AS2中的属性):

function close()
{
    myConnection.close();
}

除此之外,我还将在尝试连接时包括以下内容:

var commName:String = "MY_CONNECTION";
var myConnection:LocalConnection = new LocalConnection();

// Try to tell any open LocalConnection on this channel to close.
// This may cause an AsyncErrorEvent, so be sure to add the appropriate 
// Error handling.
myConnection.send( commName, "close" );

try
{
    myConnection.connect( commName );
}
catch( error:Error )
{

    // If there is another connection already open on the same channel,
    // that will cause an Error.  I have had some luck catching that 
    // Error and then calling connect again.  That said, you would be 
    // best to take precautions anyway.
    try
    {
        myConnection.connect( commName );
    }
    catch( error:Error )
    {
        // Your connection cannot connect!!!
        // DO SOMETHING!!!
    }
}
myConnection.client = this;

我想您可以在javascript中对卸载事件作出反应,并通过外部接口调用flex应用程序中的一些清理函数。不过,对ExternalInterface没有太多的帮助,所以我不太确定。