//我之前是写安卓的，对js也不熟悉，仅供参考，这个是用于注册的时候倒计时获取短信验证码的，不知道你要的是不是这个。

  data: {

    timeCount: ‘60’,

    timeCountFinal: ‘60’

  },

//倒计时

  countDown: function () {

    var that = this;

    var currentTime = that.data.timeCountFinal;

    var interval = setInterval(function () {

      currentTime–;

      that.setData({

        timeCount: currentTime

      })

      if (currentTime <= 0) {

        clearInterval(interval)

        currentTime = -1

        that.setData({

          timeCount: that.data.timeCountFinal

        })

      }

    }, 1000)

  },