createjs小游戏开发的实例过程-

this.backdrop = new createjs.Bitmap(bg);this.backdrop.x = 0;this.backdrop.y = 0;this.stage.addChild(that.backdrop);this.w = bg.width;this.h = bg.height;//创建一个背景副本，无缝连接var copyy = -bg.height;this.copy = new createjs.Bitmap(bg);this.copy.x = 0;this.copy.y = copyy;  //在画布上y轴的坐标为负的背景图长//使用createjs的tick函数，逐帧刷新舞台createjs.Ticker.addEventListener("tick", tick);function tick(e) {   if (e.paused !== 1) {//舞台逐帧逻辑处理函数that.backdrop.y = that.speed + that.backdrop.y;
        that.copy.y = that.speed + that.copy.y;if (that.copy.y > -40) {
              that.backdrop.y = that.copy.y + copyy;
        }if (that.copy.y > -copyy - 100) {
              that.copy.y = copyy + that.backdrop.y;
        }
        that.stage.update(e);
    }          
}

// 删除越界的元素for (var i = 0, flag = true, len = that.props.length; i  height + 300) {
            that.stage.removeChild(that.props[i]);
            that.props.splice(i, 1);
            flag = false;
        } else {
            flag = true;
        }
    }
}

var num = parseInt(2 * Math.random()) + 1, i;for (i = 0; i = 2) && (type <= 5)) {//绘制加速道具} else if ((type >= 6) && (type <= 10)) {//绘制减速道具        }
    }

var time = (parseInt(3 * Math.random()) + 1);  //随机取1～3整数// 随机时间绘制障碍物setTimeout(function () {
    that.propsTmp = [];  //清空    that.drawObstacle(obj);
}, time * 400);  //400ms ~ 1200ms

createjs.Ticker.addEventListener(“tick”, tick); 
function tick(e) { if (e.paused === 1) { //处理     }
}     
createjs.Ticker.paused = 1; //在函数任何地方调用这个，则会暂停tick里面的处理 createjs.Ticker.paused = 0; //恢复游戏

container.name = ‘role’; //设置name值car = this.stage.getChildByName(“role”);  //使用name值方便获取到该对象

//放置静态资源的数组
var manifest = [
    {src: __uri(&＃39;./images/car_prop2_tyre@2x.png&＃39;), id: &＃39;tyre&＃39;}
];
var queue = new createjs.LoadQueue();
queue.on(&＃39;complete&＃39;, handleComplete, this);
queue.loadManifest(manifest);
//资源加载成功后,进行处理
function handleComplete() {
   var tyre = queue.getResult(&＃39;tyre&＃39;);  //拿到加载成功后的img
}

;(function () {function CarGame(){}
    CarGame.prototype = {
        init:function(manifest) {this.preLoad(manifest);  //资源预加载//时间倒计时this.prepare(3, 3);  //倒计时3秒this.bindEvent(); 
        },
        render:function() {           this.drawBg(bg1);           this.drawRole(car, effbomb, effquick);           this.drawObstacle(obj);
        },//在游戏结束的时候批量销毁destroy:function(){//移除tick事件createjs.Ticker.removeEventListener("tick", this.tick);//暂停里程，倒计时clearInterval(this.changem);
            clearTimeout(this.gametime);
        }，//由于期间用户可能切出程序进行其他操作，因此都需要一个暂停的接口pause:function() {//暂停里程，倒计时clearInterval(this.changem);
            clearTimeout(this.gametime);//暂停页面滚动createjs.Ticker.paused = 1;
        },//重新开始游戏reStart:function(){           this.destroy();           this.init(manifest);
        },
        gameOver:function(){           //显示爆炸效果   var car = this.stage.getChildByName("role");
           car.getChildByName(&＃39;bomb&＃39;).visible = true;
           car.getChildByName(&＃39;quick&＃39;).visible = false;           this.destroy();
        }
    }
})()