Flex 4：垃圾收集不起作用

发布于 2024-10-03 08:47:26 字数 564 浏览 3 评论 0原文

我有一个 TitleWindow 组件，通过 PopUpManager.addPopUp() 显示。当我关闭组件时，我调用 closePopUp 事件，该事件将对象的变量设置为 null，如下所示：

// application
private var myObject:MyObject;

private function openPopUp():void
{
    myObject = new MyObject();
    myObject.addEventListener('closePopUp', closePopUp);
    PopUpManager.addPopUp(myObject, this, true);
}

private function closePopUp(e:Event):void
{
    myObject = null;
}

但是在调试模式下，我可以看到 myObject 被设置为 null，但内存使用量并没有减少。当我再次打开该组件时，内存使用量仍与之前相同。

我本以为当 myObject 变量设置为 null 时，GC 会回收该对象并释放内存。知道为什么这没有发生吗？

原文

I have a TitleWindow component that I'm displaying via PopUpManager.addPopUp(). When I close the component, I'm calling the closePopUp Event which sets the object's variable to null, as follows:

// application
private var myObject:MyObject;

private function openPopUp():void
{
    myObject = new MyObject();
    myObject.addEventListener('closePopUp', closePopUp);
    PopUpManager.addPopUp(myObject, this, true);
}

private function closePopUp(e:Event):void
{
    myObject = null;
}

However in debug mode I can see myObject being set to null, but the memory usage doesn't decrease. When I open the component again, the memory usage remains the same as before.

I would have thought when the myObject variable is set to null, GC recycles the object and frees up memory. Any idea why this is not happening?

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