ActionScript 3.0拖动物体中startDrag（）会重绘Sprite

import flash.events.Event; import flash.events.MouseEvent; import flash.display.Sprite;

//听说shape比sprite节省资源 var circle:Sprite=new Sprite(); circle.graphics.beginFill(0); //试着把circle.graphics.drawCircle(100,100,10)发现每次偏移，说明每次startDrag（）方法会重绘 circle.graphics.drawCircle(0,0,10); circle.graphics.endFill(); stage.addChild(circle); circle.addEventListener(MouseEvent.MOUSE_DOWN,startdrag); circle.addEventListener(MouseEvent.MOUSE_UP,stopdrag);

function startdrag(e:MouseEvent):void{      circle.startDrag(true);  } function stopdrag(e:MouseEvent):void{      circle.stopDrag();  }