<button class="buttonget" disabled=‘{{disabled}}‘ data-id="2" bindtap="getVerificationCode">
            {{time}}
        </button>

var interval = null //倒计时函数
Page({
  data: {
    date: ‘请选择日期‘,
    fun_id: 2,
    time: ‘获取验证码‘, //倒计时 
    currentTime: 60
  },
  getCode: function (options) {
    var that = this;
    var currentTime = that.data.currentTime
    interval = setInterval(function () {
      currentTime--;
      that.setData({
        time: currentTime + ‘秒‘
      })
      if (currentTime <= 0) {
        clearInterval(interval)
        that.setData({
          time: ‘获取‘,
          currentTime: 60,
          disabled: false
        })
      }
    }, 1000)
  },
  getVerificationCode() {
    this.getCode();
    var that = this
    that.setData({
      disabled: true
    })
  },

})

.buttonget
{  
   margin-right: 250rpx;
   width:110rpx;
   height:55rpx;
   color: #20B6C5;
   line-height: 50rpx;
   font-size: 25rpx;
   border:1rpx solid #20B6C5;
}

/*隐藏Button按钮本身的边框*/

button[class="buttonget"]::after {
  border: 0;
}