我正在将纯 as3 环境转移到 Flex 中，并且我有一个关于预加载器的问题。
对于我的一个应用程序，特别是当 swf 加载时，我会添加一个带有动画预加载器的屏幕。然后，在我的代码中的某个特定点，当我知道我的所有 xml 都已被解析、UI 已构建且所有初始化已完成时，我会调度一个“完成”事件来删除预加载器。
我怎样才能实现这一点呢？我只见过基于百分比的 Flex 预加载器，我相信它代表了 swf 本身的实际加载？
I'm moving to a pure as3 environment into flex and I have a question about preloaders.
For one of my apps in particular when the swf loaded I would add a screen with an animated preloader. Then at a particular point in my code when I know all of my xml has been parsed, UI built and all initiliztion done I dispatch a "done" event which removes the preloader.
How can I achieve this is flex? I've only ever really seen flex preloaders that are percentage based which I believe represent the actual loading of the swf itself?
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请阅读预加载器的 Flex 食谱，他们有一些演示应用程序，可以帮助您，
实际上应用程序标签中有一个预加载器属性，
这可能是您可以帮助您的
tc
安库尔·夏尔马
Please read the flex cookbook for preloaders, they have some demo applications, that could help u out
actually there is a preloader property in the application tag,
that could be wht u might help u out
tc
Ankur Sharma
Flex 有一个 ProgressBar 控件，您可以使用它来类似的目的。如果您想继续使用自己的自定义动画进度条，可以将该
Sprite添加到容器（最好是Canvas）的rawChildren中并使用PopUpManager将其显示为模式弹出窗口 - 从done事件处理程序中删除弹出窗口。如果您传递不扩展
UIComponent的子级，则Container类的重写addChild方法将引发错误 - 这就是您应该使用的原因rawChildren.addChild。Flex has a ProgressBar control that you can use for similar purposes. If you want to continue to use your own custom animated progress bar, you can add that
Spriteto therawChildrenof a Container (preferablyCanvas) and show it as a modal pop-up using thePopUpManager- remove the pop-up from thedoneevent's handler.The overriden
addChildmethod of theContainerclass will throw an error if you pass a child that doesn't extendUIComponent- that's why you should userawChildren.addChild.是的，默认的 Flex 预加载器代表 swf 本身的加载。
如果我是你，我会使用任务来自 Cairngorm 3 Libs 的库与预加载器完美配合：
http://opensource.adobe.com/svn/opensource/cairngorm3/trunk/libraries/TaskTest/src/samples/TaskFlowPreloader.as
Yep default flex preloader represents the loading of the swf itself.
If I were you, I would use the Task library from the Cairngorm 3 Libs, works perfectly with a preloader :
http://opensource.adobe.com/svn/opensource/cairngorm3/trunk/libraries/TaskTest/src/samples/TaskFlowPreloader.as