let countDownNode = this.viewNode.getChildByName('countDownNode').getComponent(cc.Label);

        countDownNode.string = '倒计时：00时05分00秒';

        let time = 300;

        countDownNode.schedule(function() {

            time--;

            let minute = parseInt(time / 60);

            let second = parseInt(time % 60);

            let hour = parseInt(minute / 60);

            let hour1 = hour > 60 ? hour % 24 : hour;

            let day = parseInt(hour / 24);

            minute = minute % 60;

            let timeStr = "";

            timeStr = hour <= 0 ? timeStr = "倒计时：" +

                // "00" + "天" +

                "00" + "时" +

                parseInt(minute / 10) + "" + minute % 10 + "分" +

                parseInt(second / 10) + "" + second % 10 + "秒" :

                timeStr = "倒计时：" +

                // parseInt(day / 10) + "" + day % 10 + "天" +

                parseInt(hour1 / 10) + "" + hour1 % 10 + "时" +

                parseInt(minute / 10) + "" + minute % 10 + "分" +

                parseInt(second / 10) + "" + second % 10 + "秒";

            countDownNode.string = timeStr;

        }, 1,time-1,0);