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

 1 var _container:Sprite = new Sprite();
 2
 3 _container.addEventListener(Event.ADDED,onAdded);
 4 _container.addEventListener(Event.ADDED_TO_STAGE,onAddedToStage);
 5 _container.addEventListener(Event.REMOVED,onRemoved);
 6 _container.addEventListener(Event.REMOVED_FROM_STAGE,onRemovedFromStage);
 7
 8 function onAdded(e:Event):void {
 9     trace("onAdded：",e);
10 }
11
12 function onAddedToStage(e:Event):void {
13     trace("onAddedToStage：",e);
14 }
15
16 function onRemoved(e:Event):void {
17     trace("onRemoved：",e);
18 }
19
20 function onRemovedFromStage(e:Event):void {
21     trace("onRemovedFromStage：",e);
22 }
23
24 addChild(_container);
25 //onAdded： [Event type="added" bubbles=true cancelable=false eventPhase=2]
26 //onAddedToStage： [Event type="addedToStage" bubbles=false cancelable=false eventPhase=2]
27
28 var _sub:Sprite = new Sprite();
29
30 _container.addChild(_sub);
31 //onAdded： [Event type="added" bubbles=true cancelable=false eventPhase=3]
32
33 /*_container.removeChild(_sub);
34 //onRemoved： [Event type="removed" bubbles=true cancelable=false eventPhase=3]*/
35
36 removeChild(_container);
37 //onRemoved： [Event type="removed" bubbles=true cancelable=false eventPhase=2]
38 //onRemovedFromStage： [Event type="removedFromStage" bubbles=false cancelable=false eventPhase=2]
39
40 _container.removeChild(_sub);
41 //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