1 Laya.timer.frameLoop(2,this,trailLoop);//隔几帧，看效果来决定
2 
3 private function trailLoop():void{
4     var trail:Image = Pool.getItemByClass("FLY_TRAIL",Image);//拖尾必须用对象池，你懂的
5     trial.skin = TRAIL_SKIN;
6     parent.addChild(trail);
7     trail.pos(target.x,target.y);//帧跟随宿主
8     Tween.to(trail,{scaleX:0,scaleY:0,alpha:0},500,null,Handler.create(this,recoverTrail,[trail]));//recover时进行事件清理和属性初始化，注意要Pool.recover
9 }