ADDED、ADDED_TO_STAGE、REMOVED、REMOVED_FROM_STAGE这几个事件的区别

 var _container:Sprite = new Sprite();

 _container.addEventListener(Event.ADDED,onAdded);
 _container.addEventListener(Event.ADDED_TO_STAGE,onAddedToStage);
 _container.addEventListener(Event.REMOVED,onRemoved);
 _container.addEventListener(Event.REMOVED_FROM_STAGE,onRemovedFromStage);

 function onAdded(e:Event):void {
     trace("onAdded：",e);
 }

 function onAddedToStage(e:Event):void {
     trace("onAddedToStage：",e);
 }

 function onRemoved(e:Event):void {
     trace("onRemoved：",e);
 }

 function onRemovedFromStage(e:Event):void {
     trace("onRemovedFromStage：",e);
 }

 addChild(_container);
 //onAdded： [Event type="added" bubbles=true cancelable=false eventPhase=2]
 //onAddedToStage： [Event type="addedToStage" bubbles=false cancelable=false eventPhase=2]

 var _sub:Sprite = new Sprite();

 _container.addChild(_sub);
 //onAdded： [Event type="added" bubbles=true cancelable=false eventPhase=3]

 /*_container.removeChild(_sub);
 //onRemoved： [Event type="removed" bubbles=true cancelable=false eventPhase=3]*/

 removeChild(_container);
 //onRemoved： [Event type="removed" bubbles=true cancelable=false eventPhase=2]
 //onRemovedFromStage： [Event type="removedFromStage" bubbles=false cancelable=false eventPhase=2]

 _container.removeChild(_sub);
 //onRemoved： [Event type="removed" bubbles=true cancelable=false eventPhase=3]

区别：

ADDED是子对象被添加到自身时触发，ADDED_TO_STAGE是对象本身被添加到显示列表时触发；类似的：REMOVED当子对象从自身移除时触发，REMOVED_FROM_STAGE是自身从显示列表中移除时触发；

ADDED/REMOVED事件会冒泡，而ADDED_TO_STAGE/REMOVED_FROM_STAGE不冒泡，也就是说每次addChild或removeChild自身时，下面的ADDED/REMOVED事件也会冒泡上来先被触发，然后才触发ADDED_TO_STAGE/REMOVED_FROM_STAGE事件.

原作者：菩提树下的杨过
出处：http://yjmyzz.cnblogs.com