AS3.0 中键盘事件、数组使用及随机数生成

　　回答http://topic.youkuaiyun.com/u/20091202/22/50f8b8f6-638a-47cb-990e-a2f36f15bbfc.html?62099问题　

交流一下AS中键盘事件、数组使用及随机数生成功能

比较简单,详细代码如下请看其中的注释：

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="init()"> <mx:Script> <!--[CDATA[ private var srcArray:Array = new Array(); private var isCirle:Boolean =false; private var currIndex:int; //记录中奖人信息下标 private function init():void { //初始化生成1-1000的源数据 for(var i:uint = 1; i<=1000; i++) { srcArray.push(i); } //注册键盘监听事件 this.addEventListener(KeyboardEvent.KEY_DOWN,onKeyDown); } private function onKeyDown(e:KeyboardEvent):void { if(e.keyCode == Keyboard.SPACE) { if(isCirle) //抽奖滚动停止 并记录并删除源数据中的值已保证不会重复 { this.removeEventListener(Event.ENTER_FRAME,onEnterFrame); txtAward.text += srcArray[currIndex].toString() +","; srcArray.splice(currIndex,1); isCirle = false; } else { //添加抽奖动画事件 this.addEventListener(Event.ENTER_FRAME,onEnterFrame); isCirle = true; } } } private function onEnterFrame(e:Event):void { //通过生成随机下标 取值已保证不会重复 currIndex = int(Math.random() * srcArray.length); this.txtDisplay.text = srcArray[currIndex]; } ]]--> </mx:Script> <mx:Label x="140" y="107" text="0" width="129" fontSize="21" color="#A0588D" fontWeight="bold" textAlign="center" enabled="true" id="txtDisplay"/> <mx:Label x="140" y="33" text="空格键开始/停止摇奖"/> <mx:TextArea x="69" y="156" height="258" width="286" id="txtAward" wordWrap="true" editable="false" color="#170838" backgroundColor="#B2B7CD" fontWeight="bold" fontSize="15"/> </mx:Application>
最终效果图如：