Why would an Image-based itemRenderer always be visible?

问题

Given the following code:

<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>

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!

回答1:

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

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

来源：https://stackoverflow.com/questions/11959854/why-would-an-image-based-itemrenderer-always-be-visible