as3.0为文本字符配上飞入动画

 

 package {import flash.display.*;import flash.text.*;import flash.geom.Point;import flash.events.*;import flash.utils.Timer;public class TextFly extends MovieClip {// 定义动画的常量static const spacing:Number = 50;//间隔static const phrase:String = "MeetLunay";static const numSteps:int = 50;static const stepTime:int = 20;static const totalRotation:Number = 360;//整体旋转static const startScale:Number = 0.0;static const endScale:Number = 2.0;//缩放结束static const startLoc:Point = new Point(250,0);//起始位置static const endLoc:Point = new Point(50,100);//结束位置private var letterFormat:TextFormat = new TextFormat("Courier",36,0x000000,true,false,false,null,null,TextFormatAlign.CENTER);// 跟踪动画的变量private var letters:Array = new Array();private var flySprite:Sprite;private var animTimer:Timer;public function TextFly() {// 保存所有元素sprite flySprite = new Sprite();addChild(flySprite);// 为每个字母创建文本字段，并放入sprite中for(var i:int=0;i<phrase.length;i++) {var letter:TextField = new TextField();letter.defaultTextFormat = letterFormat;letter.embedFonts = true;letter.autoSize = TextFieldAutoSize.CENTER;letter.text = phrase.substr(i,1);letter.x = -letter.width/2;letter.y = -letter.height/2;var newSprite:Sprite = new Sprite();newSprite.addChild(letter);newSprite.x = startLoc.x;newSprite.y = startLoc.y;flySprite.addChild(newSprite);letters.push(newSprite);}// 开始动画animTimer = new Timer(stepTime,numSteps);animTimer.addEventListener(TimerEvent.TIMER,animate);animTimer.start();}public function animate(event:TimerEvent) {// 动画的长度var percentDone:Number = event.target.currentCount/event.target.repeatCount;// 改变位置, 尺寸和旋转for(var i:int=0;i<letters.length;i++) {letters[i].x = startLoc.x*(1.0-percentDone) + (endLoc.x+spacing*i)*percentDone;letters[i].y = startLoc.y*(1.0-percentDone) + endLoc.y*percentDone;var scale:Number = startScale*(1-percentDone)+endScale*percentDone;letters[i].scaleX = scale;letters[i].scaleY = scale;letters[i].rotation = totalRotation*(percentDone-1);}}}}