屏幕休眠或后台运行倒计时暂停问题

 updateTime: function () {
    let promise = new Promise((resolve, reject) => {
      var beginTime = new Date().getTime();
      let setTimer = setInterval(
        () => {
          var newTime = new Date().getTime();
          var dTime = (newTime - beginTime) / 1000;
          dTime = parseInt(dTime);
          this.setData({
            time: 60 - dTime
          })
          if (this.data.time <= 0) {
            this.setData({
              time: 60,
              yzmStep: 3,
            })
            resolve(setTimer)
          }
        }, 1000)
    })
    promise.then((setTimer) => {
      clearInterval(setTimer)
    })
  },