我想检测对象是否确实从舞台上移除了。我在这里和其他地方检查了很多答案,并且不知道如何注意到该对象确实已从舞台上移除(我的意思是它不再显示在舞台上)。下面的代码是我最后的测试:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Canvas width="100%" height="50%" backgroundColor="gray" id="c1">
<mx:Canvas id="cChild" backgroundColor="black" width="20" height="20"
left="20" top="20"
removedFromStage="trace('removed from stage ' + event.target)"
removed="trace('removed ' + event.target)">
</mx:Canvas>
</mx:Canvas>
<mx:Canvas width="100%" height="50%" backgroundColor="white" id="c2">
</mx:Canvas>
<mx:Button label="add child" click="c2.addChild(c1)" />
<mx:Button label="add child2" click="addChild(c1)" />
</mx:Application>
我不明白我在控制台输出中发现了什么:
removed MainFlex0.c1.cChild.border
- before click 'add child'
removed from stage MainFlex0.c1.cChild
removed MainFlex0.c2.c1.cChild.border
- after click 'add child', before 'add child2'
removed from stage MainFlex0.c2.c1.cChild
removed MainFlex0.c1.cChild.border
- after click 'add child2'
是否有任何条件我可以检查并确保该对象真的“即将从舞台上移除”?
萨拉姆