平滑进度条

　　在舞台上绘制progressBar元件，注册点设置为左边。代码如下：
 1 package 
 2 {
 3     import flash.display.MovieClip;
 4     import flash.events.Event;
 5     
 6     public class ProgressBar extends MovieClip
 7     {
 8         private var totalTime:Number;
 9         private var startTime:Number;
10         private var stopTime:Number;
11         
12         public function ProgressBar()
13         {
14             initGame();
15         }
16         
17         /**
18          * 初始化游戏
19          */
20         private function initGame():void
21         {
22             //设置初始数据
23             setData();        
24         }
25         
26         /**
27          * 设置游戏数据
28          */
29         private function setData():void
30         {
31             startTime = 0;
32             totalTime = 30;
33             progressBar.scaleX = 1;
34             // 设定计时器
35             setGameTimer();
36         }
37         
38         /**
39          * 设置计时器
40          */
41         private function setGameTimer():void
42         {
43             var startDate:Date = new Date();
44             startTime = startDate.getTime();
45             totalTime = totalTime * 1000;
46             this.addEventListener(Event.ENTER_FRAME, onEnterFrame);
47         }
48         
49         /**
50          * 刷新游戏进度条
51          */
52         private function onEnterFrame(e:Event):void
53         {
54             var nowTime:Date = new Date();
55             var passTime:Number = nowTime.getTime() - startTime;
56             progressBar.scaleX = 1 - passTime / totalTime;
57             if (passTime > totalTime)
58             {
59                 endGame();
60             }
61         }
62         
63         /**
64          * 游戏结束
65          */
66         private function endGame():void
67         {
68             this.removeEventListener(Event.ENTER_FRAME, onEnterFrame);
69             trace("gameOver")
70         }
71     }
72 
73 }