我有一个Flex 4火花面板我雨后春笋般冒出来，通过PopUpManager中，但它在顶部我无法摆脱的灰色部分。那是什么，我该如何去除呢？

更新 的：一个例子面板如下。我只需拨打 PopUpManager.addPopUp（新パ（），背景，真实）; 就可以了，并收到上面的按钮是灰色实吧

 ＆LT; S：面板的xmlns：S =库：//ns.adobe.com/flex/spark
         的xmlns：FX =htt​​p://ns.adobe.com/mxml/2009
         dropShadowVisible =假
         backgroundAlpha =为0
         controlBarVisible =假
         borderVisible =假＆GT;
    ＆所述氏：VGroup＆GT;
        ＆LT; S：按钮标签=A键WIDTH =150HEIGHT =55/＆GT;
    ＆所述; /秒：VGroup＆GT;
＆LT; / S：面板＆gt;
 

解决方案

所以，这就是我是如何做的。我做了一个自定义皮肤：HeaderlessPanelSkin.as

 公共类HeaderlessPanelSkin扩展PanelSkin {
   公共职能HeaderlessPanelSkin（）{
        超（）;

        topGroup.includeInLayout = FALSE;
    }
}
 

然后，在面板中，我只是引用新的皮肤：的skinClass =HeaderlessPanelSkin

这应该这样做：）

I have a Flex 4 spark Panel I'm popping up through the PopUpManager, but it has a gray portion at the top I can't get rid of. What is that and how can I remove it?

UPDATE: An example Panel is below. I simply call PopUpManager.addPopUp(new TestPanel(), background, true); on it and receive that solid gray bar above the button.

<s:Panel xmlns:s="library://ns.adobe.com/flex/spark"
         xmlns:fx="http://ns.adobe.com/mxml/2009"
         dropShadowVisible="false"
         backgroundAlpha="0"
         controlBarVisible="false"
         borderVisible="false">
    <s:VGroup>
        <s:Button label="A button" width="150" height="55"/>
    </s:VGroup>
</s:Panel>

So, this is how I did it. I made a custom skin: HeaderlessPanelSkin.as

public class HeaderlessPanelSkin extends PanelSkin {
   public function HeaderlessPanelSkin() {
        super();

        topGroup.includeInLayout = false;
    }
}

Then, in the panel, I just reference the new skin: skinClass="HeaderlessPanelSkin"

That should do it :)