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1、在FLA中建四個球，分別實例"ball1"、"ball2"、"ball3"、"ball4"。
2、main.as：
package??
{
import?flash.display.Sprite;
import?flash.events.MouseEvent;
import?flash.display.DisplayObject;
/**
*?...
*?@author?沙子?QQ:8286659?http://www.taoshaw.com
*/
public?class?main?extends?Sprite
{
??//定義四個球
??private?var?my_ball1:ball1;
??private?var?my_ball2:ball2;
??private?var?my_ball3:ball3;
??private?var?my_ball4:ball4;
??private?var?my_Spr:Sprite;
??public?function?main()?
??{
???_showball1();
???_showball2();
???_showball3();
???_showball4();
???my_Spr?=?new?Sprite();
???//將第一個球顯示在第一層,
???my_Spr.addChildAt(my_ball1,?0)
???//將第二個球顯示在第二層,
???my_Spr.addChildAt(my_ball2,?1)
???//將第一個球顯示在第三層,
???my_Spr.addChildAt(my_ball3,?2)
???//將第一個球顯示在第一層,
???my_Spr.addChildAt(my_ball4,?3)
???my_ball1.addEventListener(MouseEvent.MOUSE_DOWN,?startDrags)
???my_ball1.addEventListener(MouseEvent.MOUSE_UP,?stopDrags)
???my_ball2.addEventListener(MouseEvent.MOUSE_DOWN,?startDrags)
???my_ball2.addEventListener(MouseEvent.MOUSE_UP,?stopDrags)
???my_ball3.addEventListener(MouseEvent.MOUSE_DOWN,?startDrags)
???my_ball3.addEventListener(MouseEvent.MOUSE_UP,?stopDrags)
???my_ball4.addEventListener(MouseEvent.MOUSE_DOWN,?startDrags)
???my_ball4.addEventListener(MouseEvent.MOUSE_UP,?stopDrags)
???//此句非要不可,否則出錯.
???addChild(my_Spr)
??}
??
??private?function?stopDrags(e:MouseEvent):void?
??{
???e.target.stopDrag();
??}
??
??private?function?startDrags(e:MouseEvent):void?
??{
???e.target.startDrag();
???//將當(dāng)前點(diǎn)擊的元件的層級設(shè)置為my_Spr所有子項目數(shù)的最高層.
???my_Spr.setChildIndex(DisplayObject(e.target),my_Spr.numChildren-1)
??}
??
??private?function?_showball4():void
??{
???my_ball1?=?new?ball1();
???my_ball1.x?=?100;
???my_ball1.y?=?200;
???
??}
??
??private?function?_showball3():void
??{
???my_ball2?=?new?ball2();
???my_ball2.x?=?150;
???my_ball2.y?=?200;
??}
??
??private?function?_showball2():void
??{
???my_ball3?=?new?ball3();
???my_ball3.x?=?200;
???my_ball3.y?=?200;
??}
??//顯示第一個球體
??private?function?_showball1():void
??{
???my_ball4?=?new?ball4();
???my_ball4.x?=?250;
???my_ball4.y?=?200;
??}
??
}
}
重要地方說明：
1、獲取當(dāng)前點(diǎn)擊元件的實例：e.target.name。感謝etall跟藍(lán)色海洋。。。要想獲取當(dāng)前點(diǎn)擊元件就得e.target。
2、將元件調(diào)到最高級。。。
my_Spr.setChildIndex(DisplayObject(e.target),my_Spr.numChildren-1)；
在使用DisplayObject之前，需要導(dǎo)入該類。import flash.display.DisplayObject；
3、關(guān)于拖曳其實比較簡單。主要是獲取當(dāng)前點(diǎn)擊的這個比較難。
附件下載：

?
startdrag.rar
本文轉(zhuǎn)自：http://www.5uflash.com/flashjiaocheng/Flash-as3-jiaocheng/4609.html

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