小练习

小练习：在场景中放置1个Sprite，绘制矢量矩形后让其在400*400的范围内移动。

若碰到边界就转向，并分裂出一个新的Sprite，新的Sprite和原有Sprite一样，移

动和产生更新的Sprite。当1个Sprite分裂过3次后再次碰到边界，将其清除。

package 
{
    import flash.display.Sprite;
    import flash.events.Event;
    [SWF(width = "400",height = "400",backgroundColor = "#159357")]
    public class Main extends Sprite
    {
        private var sArr:Array = [];
        private var colorArr = ["0xff00ff","0x00ffff","0xffff00","0x0000ff","0x00ff00","0xff0000"];
        private var sNum:int = 0;
        public function Main():void
        {
            DrawRect();
        }

        private function DrawRect()
        {
            sNum++;
            var num:int=int(5*Math.random());
            var s:Sprite=new Sprite();
            s.graphics.beginFill(colorArr[num],0.6);
            s.graphics.drawRect(0,0,10,10);
            s.graphics.endFill();
            s.x=int(400*Math.random());
            s.y=int(400*Math.random());
            addChild(s);
            s.addEventListener(Event.ENTER_FRAME,enterHandler);
            if (s.name.length >= 9)
            {
                s.name = "1";
            }
            if (num%2==0)
            {
                s.mouseChildren = false;
            }
            else
            {
                s.mouseChildren = true;
            }
            sArr.push(s);
        }
        private function enterHandler(e:Event)
        {
            if (e.target.mouseChildren == false)
            {
                e.target.x +=  5;
            }
            else if (e.target.mouseChildren==true)
            {
                e.target.x -=  5;
            }
            if (e.target.x>=(stage.stageWidth-e.target.width)||e.target.x<=0)
            {
                judgeFun((e.target as Sprite));
            }
        }

        private function judgeFun(mc:Sprite)
        {
            trace(mc.name);
            var k:int = int(mc.name);
            k++;
            if (k<4)
            {
                mc.name = String(k);
            }
            else
            {
                trace("over");
                for (var i=0; i<sArr.length; i++)
                {
                    sArr[i].removeEventListener(Event.ENTER_FRAME,enterHandler);
                    removeChild(sArr[i]);
                }
                return;
            }

            if (mc.mouseChildren == false)
            {
                mc.mouseChildren = true;
            }
            else
            {
                mc.mouseChildren = false;
            }

            DrawRect();
        }
    }
}