apache-flex - AIR:为什么 stage == null？

Question

我正在尝试在我的 AIR 应用程序上设置 scaleMode。这是通过 stage.scaleMode 设置的。但是，当我尝试引用 stage 时，它​​返回为 null。我不知道为什么？

这是整个应用程序:

<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init()">
    <mx:Script>
        <![CDATA[
            import flash.display.StageDisplayState;
            private function init():void
            {
                var s:Stage = this.stage; //<<-- this.stage == null...why??
                s.scaleMode = StageScaleMode.EXACT_FIT;
            }
        ]]>
    </mx:Script>
</mx:WindowedApplication>

Answer 1

试试 windowComplete而不是 creationComplete .还:

[If] you are trying to add eventListeners to the stage right from the start of your application execution, this will only work with updateComplete() and applicationComplete().

来源: http://www.wietseveenstra.nl/blog/2007/02/understanding-the-flex-application-startup-event-order/