var stage; init(); function init() {     var canvas = document.getElementById("testCanvas");     stage = new createjs.Stage(canvas);     stage.canvas.width = 750;     stage.canvas.height = 1334;     stage.autoClear = true;     //绘制外部容器     container = new createjs.Container();      stage.addChild(container);     //添加背景图     var bg = new createjs.Bitmap("../res/bg.jpg");     stage.addChild(bg);     //增加5个冰激凌，不断做旋转和放缩     for (var i = 0; i < 5; i++) {         var man = new createjs.Bitmap("../res/ice_cream.png");         man.regX = 60;         man.regY = 42;         man.x = canvas.width / 5 * 4;         man.y = canvas.height / 6 * (i + 1);         man.scaleX = man.scaleY = 1;         stage.addChild(man);         createjs.Tween.get(man, {             loop: true         }, true).to({             rotation: 360,             scaleX: 2,             scaleY: 2         }, 1000).to({             rotation: 360,             scaleX: 1,             scaleY: 1         }, 1000);         man.addEventListener("click", eventCallback);         //监听点击非常方便，位图的透明区域忽略鼠标事件     }     function eventCallback(event) {         console.log("click", event.currentTarget);     }     stage.update();     createjs.Ticker.setFPS(60);     createjs.Ticker.addEventListener("tick", tick); } //这里有点猥琐，需要用户自行控制舞台不断update更新 function tick(event) {     stage.update(event); }