为什么基于图像的 itemRenderer 始终可见? [英] Why would an Image-based itemRenderer always be visible?

问题描述

给定以下代码:

<mx:DataGridColumn dataField="ongoing" id="ongoing" headerText="" width="20">
    <mx:itemRenderer>
    <mx:Component>
            <mx:Image source="logo.jpg" visible="false" />
        </mx:Component>
    </mx:itemRenderer>
</mx:DataGridColumn>

为什么图像总是可见的?我知道 data.ongoing 总是被设置为等于 'False'，我知道图像正在获取这些信息.据我所知，这甚至不应该与它有任何关系，但我以前对 Flex 的框架感到惊讶.谢谢！

why would the image always be visible? I know for a fact that data.ongoing is always being set equal to 'False', and I know for a fact that the image is getting this information. That shouldn't even have anything to do with it, as far as I can tell, but I've been surprised by Flex's framework before. Thanks!

推荐答案

这很可能是因为 Flex 回收其 itemrenderer 以节省内存.这是之前有人问过的类似问题.

It's most likely because Flex recycles its itemrenderers to save memory. Here's a similar question that was asked before.

我要做的是覆盖 set data 方法，将图像的可见值设置为应有的值.

What I would do is override the set data method to set the image's visible value to what it should be.

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