回答

支持interval

<!--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>

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);
          }
    , 2000);   
  },
  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)
  },
 
})