收藏两个位图切割实现动画效果的例子（一个是用位图切割的方式，另一个是用scrollRect）

位图切割方式：

package { import flash.display.*; import flash.events.*; import flash.net.*; import flash.events.IOErrorEvent; import flash.system.System; import flash.geom.Rectangle; import flash.geom.Point; public class QBitmapData { private var bufferContainer:DisplayObjectContainer; private var imagePath:String; private var bitmapArray:Array; private var _loader:Loader; private var size:Number; private var rowNum:uint; private var listNum:uint; private var count:uint; public var callBack:Function; public function QBitmapData(imagePath:String, size:Number=16,_bufferContainer:DisplayObjectContainer = null):void { bufferContainer = _bufferContainer; this.ImagePath = imagePath; this.size = size; } public function set ImagePath(_path:String):void { var urlRequest:URLRequest = new URLRequest(_path); this._loader = new Loader(); //this._loader.contentLoaderInfo.addEventListener(Event.OPEN, openHandler); //this._loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progressHandler); this._loader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler); //this._loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler); this._loader.load(urlRequest); } private function completeHandler(event:Event):void { 　 　 var target:DisplayObject = _loader.content as DisplayObject; 　 var xpos:Number = -this.size; var ypos:Number = 0; var bmd:BitmapData = new BitmapData(target.width, target.height, true, 0); bmd.draw(target); this._loader.unload(); this._loader.contentLoaderInfo.removeEventListener(Event.COMPLETE, completeHandler); this.rowNum = Math.floor(bmd.width / this.size); this.listNum = Math.floor(bmd.height / this.size); this.count = this.rowNum * this.listNum; //创建长度数组; bitmapArray = new Array(count); // var rec:Rectangle = new Rectangle(0, 0, this.size, this.size); var p:Point = new Point(0, 0); for (var i:Number = 0; i < count; i++) { var localBMD:BitmapData = new BitmapData(this.size, this.size); if (xpos == (bmd.width - this.size)) { //换行读下一张,像是一个二维数组 ypos += this.size; xpos = -this.size; } xpos += this.size; rec.x = xpos; rec.y = ypos; localBMD.copyPixels(bmd, rec, p); this.bitmapArray[i] = localBMD; } bmd.dispose();//释放bmd资源 this.callBack(this.bitmapArray,this.Index(0)); } public function Index(index:Number):BitmapData { if (this.bitmapArray.length<=index) { throw new Error("超过索引"); } return this.bitmapArray[index]; } public function get BitmapArray():Array { return this.bitmapArray; } public function get RowNum():uint { return this.rowNum; } public function get ListNum():uint { return this.listNum; } public function get Count():uint { return this.count; } public function toString() { return "lbynet bitamp array"; } } }

scrollRect方式：

package { import flash.display.*; import flash.events.*; import flash.net.*; import flash.events.IOErrorEvent; import flash.system.System; import flash.geom.Rectangle; import flash.geom.Point; /** * ... * @lbynet */ public class QScrollRect { private var bufferContainer:DisplayObjectContainer; private var imagePath:String; private var rectArray:Array; private var _loader:Loader; private var size:Number; private var rowNum:uint; private var listNum:uint; private var count:uint; 　 public var callBack:Function; public function QScrollRect(imagePath:String, size:Number=16,_bufferContainer:DisplayObjectContainer = null):void { bufferContainer = _bufferContainer; this.ImagePath = imagePath; this.size = size; } public function set ImagePath(_path:String):void { var urlRequest:URLRequest = new URLRequest(_path); this._loader = new Loader(); this._loader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler); this._loader.load(urlRequest); } private function completeHandler(event:Event):void { var target:DisplayObject = _loader.content as DisplayObject; var xpos:Number = -this.size; var ypos:Number = 0; var bmd:BitmapData = new BitmapData(target.width, target.height, true, 0); bmd.draw(target); this._loader.unload(); this._loader.contentLoaderInfo.removeEventListener(Event.COMPLETE, completeHandler); this.rowNum = Math.floor(bmd.width / this.size); this.listNum = Math.floor(bmd.height / this.size); this.count = this.rowNum * this.listNum; //创建长度数组; this.rectArray = new Array(count); var rec:Rectangle; var p:Point = new Point(0, 0); for (var i:Number = 0; i < count; i++) { rec = new Rectangle(0, 0, this.size, this.size); if (xpos == (bmd.width - this.size)) { //换行读下一张,像是一个二维数组 ypos += this.size; xpos = -this.size; } xpos += this.size; rec.x = xpos; rec.y = ypos; this.rectArray[i] = rec; } this.callBack(bmd,this.Index(0)); //bmd.dispose();//释放bmd资源 } public function Index(index:Number):Rectangle { if (this.rectArray.length <= index) { throw new Error("超过索引"); } return this.rectArray[index]; } public function get RectArray():Array { return this.rectArray; } public function get RowNum():uint { return this.rowNum; } public function get ListNum():uint { return this.listNum; } public function get Count():uint { return this.count; } public function toString() { return "lbynet bitamp array"; } } }

下面是测试：

package { import flash.display.*; import flash.events.*; import flash.utils.Timer; /** * ... * @lbynet */ public class Main extends Sprite { private var size:uint = 100; private var timer:Timer; private var bitmapArray:Array; private var gameContent:Sprite; private var qBitmapData:QBitmapData; private var bitmapData:BitmapData; private var direction:uint;//方向 private var index:uint; private var rowNum:uint; public function Main() { init(); } private function init():void { gameContent = new Sprite(); this.addChild(gameContent); gameContent.x = stage.stageWidth / 2 - this.size/2; gameContent.y = stage.stageHeight / 2 - this.size/2; this.qBitmapData = new QBitmapData("sprite.png", this.size); //this.qBitmapData = new QBitmapData("sprite.png", 100, gameContent); this.qBitmapData.callBack = callBack; } private function addListener():void { this.timer = new Timer(100); this.timer.addEventListener(TimerEvent.TIMER, timerHandler); stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler); } private function timerHandler(event:TimerEvent):void { if (this.gameContent.numChildren>1) { this.gameContent.removeChildAt(0); } var btd:BitmapData = this.bitmapArray[this.direction*this.rowNum + this.index]; var bm:Bitmap = new Bitmap(btd); gameContent.addChild(bm); //角色动作控制 if (this.index < this.rowNum - 1) { this.index ++; } else { this.index = 0; } trace(gameContent.width); } private function keyDownHandler(event:KeyboardEvent):void { switch (event.keyCode) { case 40 : this.direction = 0; break; case 38 : this.direction = 3; break; case 37 : this.direction = 1; break; case 39 : this.direction = 2; break; } } private function callBack(bitmapArray:Array, btd:BitmapData):void { //trace("callBack function" + bitmapArray); //trace("callBack function" + btd); this.bitmapArray = bitmapArray; this.rowNum = this.qBitmapData.RowNum; this.addListener(); this.timer.start(); //var btd2:BitmapData=_bitmap.Index(10); //var bm2:Bitmap=new Bitmap(btd2); //gameContent.addChild(bm2); } } }