微信小程序时间，计时器setInterval，setTimeou

setInterval

data: {
    setInter: '',
},

//简单计时器
startSetInter: function () {
   var that = this;
   that.data.setInter = setInterval(
   function () {
       //函数
   }, 1000);
},

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

[https://baike.baidu.com/item/setInterval](https://baike.baidu.com/item/setInterval)

不闪烁,倒计时,后台持续执行,提示框

  /**
   * 页面的初始数据
   */
  data: {
    openTime: 20.0,
    setInter: '',
}

//开始开锁计时器
  startSetInter: function () {

    var that = this;



    //----
  
    //---
   that.data.setInter = setInterval(function () {
  

     var numVal = that.data.openTime - 1;

     that.setData({ openTime: numVal });
     wx.showToast({
       title: '执行中'+that.data.openTime.toString()+'秒',
       icon: 'none'
     })
     if (that.data.openTime ==0){
that.endSetInter();
       wx.showToast({
         title: '倒计时结束！',
         icon: 'none'
       })
}

    }, 1000);

  },

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

setTimeout

https://www.jianshu.com/p/fc9a08ca2c92