flexevent.application_complete在简单应用程序中从未调用过

我更新了您下面的代码,并对您的错误进行了一些评论。如果你还有其他问题,可以随时问。

Test.mxml

<?xml version="1.0" encoding="utf-8"?>
<s:Application 
    xmlns:fx="http://ns.adobe.com/mxml/2009" 
    xmlns:s="library://ns.adobe.com/flex/spark" 
    xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="215" minHeight="138" width="215" height="138" backgroundAlpha="0.0"
    initialize="handle_initialize(event)"
>

    <fx:Script>
        <![CDATA[
            import mx.events.FlexEvent;

            // Probably want to keep your rec object around
            private var rec:LRec;

            // Construct your LRec instance in the Application's inititialize state,
            // rather than declaring it statically.
            protected function handle_initialize(event:FlexEvent):void
            {
                // Construct a new LRec instance, assign it to our private variable.
                this.rec = new LRec();

                // The <s:Applicaiton instance we define in this mxml is the object that 
                // will actually dispatch the applicationComplete event, so we want to
                // listen for that here and pass it on to our LRec instance's mainInit 
                // method when it fires.
                this.addEventListener(FlexEvent.APPLICATION_COMPLETE, this.rec.mainInit);
            }
        ]]>
    </fx:Script>

    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
</s:Application>

LRec.as

package
{
    import mx.events.FlexEvent;

    // Don't inherit from Application, as you've already defined your application
    // in your mxml, and you should have only one Application instance per application.
    public class LRec
    {

        public function LRec()
        {
            trace("CONSTRUCTED");

            // Doesn't need the event listener anymore.

            // Do any instantiation needed.
        }

        /**
         * After the application startup is complete, debug
         */
        public function mainInit(event:FlexEvent):void {
            trace("COMPLETE");

            // Do any of the work that needs to wait for the applicationComplete
            // event to fire.
        }
    }
}

Here's 一篇关于flex实例化模型的好文章(虽然有点过时)。