Page({ data: { style_img: '', second: '0' + 0, countdown: '00:00', count: 0, leftTime: 0 }, countTime() { var that = this; let count = that.data.count let leftTime = that.data.leftTime console.log(count) if (count == 0) { count = count + 1 that.setData({ count: count }) } else { console.log(leftTime) leftTime = leftTime + 100 that.setData({ leftTime: leftTime }) } var s, ms; if (leftTime >= 0 && leftTime<105000) { s = Math.floor(leftTime / 1000 % 60); ms = Math.floor(leftTime % 1000); ms = ms < 100 ? "0" + ms : ms s = s < 10 ? "0" + s : s that.setData({ countdown: s + ":" + ms, }) //递归每秒调用countTime方法，显示动态时间效果 setTimeout(that.countTime, 100); } else { let countdown = this.data.countdown console.log('已截止') that.setData({ countdown: countdown }) } }, drawEndBtn: function(){ var that = this var leftTime = that.data.leftTime leftTime = 105000 this.setData({ leftTime:leftTime }) that.countTime() //clearTimeout(leftTime) }, // onUnload: function () { // var that =this; // clearTimeout(that.data.leftTime) // }, 感谢大家解答 看看cleartimeout哪用的不对