1、wxml代码

<!--index.wxml-->
<view class="container">
 <button type=‘primary‘ style=‘margin-bottom:40px;‘ bindtap=‘startSetInter‘>开始</button>
 <button type=‘primary‘ bindtap=‘endSetInter‘>结束</button>
</view>

2、js代码

　　将计时器赋值给 data 中的变量，这样在任何方法中都可以清除计时器

Page({
 data: {
     //存储计时器
   setInter:‘‘,
   num:1,
 },
 onLoad: function () {
     var that = this;
      
 },
 startSetInter: function(){
     var that = this;
     //将计时器赋值给setInter
     that.data.setInter = setInterval(
         function () {
             var numVal = that.data.num + 1;
             that.setData({ num: numVal });
             console.log(‘setInterval==‘ + that.data.num);
         }
   , 1000);   
 },
 endSetInter: function(){
     var that = this;
     //清除计时器  即清除setInter
     clearInterval(that.data.setInter)
 },
 onHide: function () {

 },
 onUnload: function () {
     var that =this;
     //清除计时器  即清除setInter
     clearInterval(that.data.setInter)
 },

})

【小程序开发】计时器