getVerificationCode: function() {

    var that = this;

    var currentTime = that.data.currentTime;

    that.setData({

      codename: currentTime + '秒',

      disabled:true

    })

    var interval = setInterval(function() {

      that.setData({

        codename: (currentTime - 1) + '秒'

      })

      currentTime--;

      if (currentTime <= 0) {

        clearInterval(interval)

        that.setData({

          codename: '重新获取',

          currentTime: 60,

          disabled: false

        })

      }

    }, 1000)

  },