事件处理基础知识（二）事件里的currentTarget和target的区别?

 1 
 2  3                xmlns:s="library://ns.adobe.com/flex/spark" 
 4                creatiOnComplete="init()"
 5                xmlns:mx="library://ns.adobe.com/flex/mx" min min xmlns:com="com.*">
 6     
 7         
 8     
 9     
10         
11     
12     
13         [CDATA[
14             import mx.collections.ArrayCollection;
15             import mx.controls.Alert;  
16             private function init(): void  
17             {  
18                 addEventListener(MouseEvent.CLICK, clickHandler);                   
19             }  
20             private function clickHandler(event: MouseEvent): void  
21             {  
22                 trace("target: " + (event.target as DisplayObject).name +"引起的事件" 
23                     + "\ncurrentTarget: " + (event.currentTarget as DisplayObject).name+"处理事件");  
24             }      
25         ]]>
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35 

 1 const MAX_NUM:int = 10;
 2 var sceneWidth:int = stage.stageWidth;
 3 var sceneHeight:int = stage.stageHeight;
 4 var currentApple:InteractiveObject;
 5 var currentAppleClicked:InteractiveObject;
 6 for ( var i:int = 0; i )
 7 {
 8 currentApple = new Apple();
 9 currentApple.x = Math.random()*sceneWidth;
10 currentApple.y = Math.random()*sceneHeight;
11 addChild ( currentApple );
12 // Listen to the MouseEvent.CLICK event
13 currentApple.addEventListener ( MouseEvent.CLICK, onAppleClick );
14 }
15 function onAppleClick ( e:MouseEvent ):void
16 {
17 currentAppleClicked = e.currentTarget as InteractiveObject;
18 currentAppleClicked.removeEventListener(MouseEvent.CLICK, onAppleClick );
19 removeChild ( currentAppleClicked );
20 }

 1 const MAX_NUM:int = 10;
 2 var sceneWidth:int = stage.stageWidth;
 3 var sceneHeight:int = stage.stageHeight;
 4 var currentApple:InteractiveObject;
 5 var currentAppleClicked:InteractiveObject;
 6 var container:Sprite = new Sprite();
 7 addChild ( container );
 8 // Listen to the MouseEvent.CLICK on the apple's parent
 9 // Passing true as third parameter catches the event during its capture phase
10 container.addEventListener ( MouseEvent.CLICK, onAppleClick, true );
11 for ( var i:int = 0; i )
12 {
13       currentApple = new Apple();
14       currentApple.x = Math.random()*sceneWidth;
15       currentApple.y = Math.random()*sceneHeight;
16       container.addChild ( currentApple );
17 }
18 function onAppleClick ( e:MouseEvent ):void
19 {
20       currentAppleClicked = e.target as InteractiveObject;
21       container.removeChild ( currentAppleClicked );
22 }