小程序发送短信验证码倒计时

在做微信小程序时，需要发送短信验证码60S倒计时，下面我就写一下我自己的方法

WXML按钮

<button  hidden="{{nullHouse1}}" class="get_code" bindtap="getcode" data-mess="{{sms_zt}}" >{{sms_zt}} </button>
<button  hidden="{{nullHouse2}}" class="get_code">{{second}}s后重新获取</button>

JS

// pages/login/login.js
Page({

  /**
   * 页面的初始数据
   */
  data: {
    sms_zt : '发送验证码',
    message:'请输入您的手机号码',
    second: 60,
    nullHouse1: false,
    nullHouse2:true
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    var that = this
    wx.setNavigationBarTitle({
      title: '绑定手机'
    })
    //获取用户信息
    wx.getStorage({
      key: 'user',
      success: function (res) {
        console.log(res.data)
        that.setData({
          user:res.data
        })
      }
    })
  },


  getcode: function (e) {
    var phone = this.data.phone
    if(!phone){
      var that = this;
      this.setData({
        nullHouse: false, //弹窗显示
      })
      setTimeout(function () {
        that.setData({
          nullHouse: true //弹窗显示
        })
      }, 2000)
    }else{
      var that = this
      wx.request({
        url: getApp().data.web_url + '/index.php?s=/Index/api/get_sms', //获取短信验证码
        data: {
          phone: phone
        },
        header: {
          "Content-Type": "application/json"
        },
        success: function (res) {
          console.log(res.data)
          if(res.data.state == 1){
            countdown(that)

          }
        }
      })
    }
  }

})

//倒计时方法
function countdown(that) {
  var second = that.data.second;
  if (second == 0) {
    // console.log("Time Out...");
    that.setData({
      selected: false,
      selected1: true,
      second: 60,
      nullHouse1: false,
      nullHouse2: true
    });
    return;
  }
  var time = setTimeout(function () {
    that.setData({
      second: second - 1,
      nullHouse1: true,
      nullHouse2: false
    });
    countdown(that);
  }, 1000)
}