微信小程序验证码倒计时

<view class="all">
  <!-- 手机 -->
  <view class="tel">
    <!-- 手机图标 -->
    <view class="icon_tel">
      <image class="tel_image" src="https://image.flaticon.com/icons/svg/660/660439.svg"></image>
      <text class="tel_words">手机</text>
    </view>
    <!-- 内容 -->
    <view class="content_tel">
      <view class="adress">
        <text>＋86</text>
      </view>
      <view class="sign">
        <text>▼</text>
      </view>
      <view>
        <input class="input_tel" placeholder="请输入手机号" focus="{{focus}}"  value="{{tel}}" bindinput="watchTel"/>
      </view>
    </view>
    <!-- 下划线 -->
    <view class="line_adress"></view>
    <view class="line_input"></view>
  </view>
 
  <!-- 验证码 -->
  <view class="VerificationCode ">
    <!-- 验证码图标 -->
    <view class="icon_VerificationCode">
      <image class="tel_image" src="https://image.flaticon.com/icons/png/128/179/179640.png"></image>
      <text class="tel_words">验证码</text>
    </view>
 
    <!-- 内容 -->
    <view class="content_VerificationCode">
      <view>
        <input class="input_VerificationCode" placeholder="请输入验证码" focus="{{focus}}"  value="{{VerificationCode}}" bindinput="watchVerificationCode"/>
      </view>
    </view>
    <!-- 点击获取验证码 -->
    <view>
      <button class="button_VerificationCode" size="mini" style="background-color:{{color}}" disabled="{{disabled}}" bindtap="bindButtonTap">
        <view class="world">
          <text class="button_world">{{text}}</text>
        </view>
      </button> 
    </view>
    <!-- 下划线 -->
    <view class="line_VerificationCode"></view>
  </view>
 
  <!-- 提交按钮 -->
  <view>
    <button class="button_submission" type="primary" size="default" bindtap="ChangeTel">
      <text class="button_submissionWorld">提交</text>
    </button>
</view>

.all{
  height: 100vh;
  width: 100vw;
  /* border: 2rpx solid blue; */
}
 
.tel{
  position: relative;
  top: 10vh;
  left: 10vw;
  height: 16vh;
  width: 80vw;
  /* border: 2rpx solid red; */
}
 
.icon_tel{
  position: absolute;
  top: 1vh;
  left: 2vh;
  height: 6vh;
  width: 24vw;
  /* border: 2rpx solid red; */
}
 
.tel_image{
  position: absolute;
  height: 6vh;
  width: 7vw;
  /* border: 2rpx solid red; */
}
 
.tel_words{
  position: absolute;
  left: 9vw;
  height: 6vh;
  width: 15vw;
  top: 1vh;
  /* border: 2rpx solid red; */
}
 
.content_tel{
  position: absolute;
  top: 8vh;
  left: 2vw;
  height: 6vh;
  width: 75vw;
  /* border: 2rpx solid blue; */
}
 
.line_adress{
  position: absolute;
  height: 3rpx;
  width: 21vw;
  left: 2vw;
  bottom: 0.5vh;
  background:gainsboro;
}
 
.line_input{
  position: absolute;
  height: 3rpx;
  width: 47vw;
  left: 25vw;
  bottom: 0.5vh;
  background:gainsboro;
}
 
.line_VerificationCode{
  position: absolute;
  height: 3rpx;
  width: 47vw;
  left: 2vw;
  bottom: 0.5vh;
  background:gainsboro;
}
 
.adress{
  position: absolute;
  top: 1vh;
  height: 5vh;
  width: 20vw;
  /* border: 2rpx solid gold; */
  text-align: center;
}
 
.sign{
  position: absolute;
  height: 5vh;
  width: 4vw;
  top: 2vh;
  left: 20vw;
  /* border: 2rpx solid greenyellow; */
  text-align: center;
  align-items: center;
  font-size: 22rpx;
}
 
.input_tel{
  position: absolute;
  height: 6vh;
  width: 47vw;
  left: 28vw;
  /* border: 2rpx solid red; */
}
 
.input_VerificationCode{
  position: absolute;
  height: 6vh;
  width: 47vw;
  left: 2vw;
}
 
.VerificationCode{
  position: relative;
  top: 15vh;
  left: 10vw;
  height: 16vh;
  width: 80vw;
  /* border: 2rpx solid red; */
}
 
.icon_VerificationCode{
  position: absolute;
  top: 1vh;
  left: 3vh;
  height: 6vh;
  width: 24vw;
  /* border: 2rpx solid red; */
}
 
.content_VerificationCode{
  position: absolute;
  top: 8vh;
  left: 2vw;
  height: 6vh;
  width: 47vw;
  /* border: 2rpx solid blue; */
}
 
.button_VerificationCode{
  /* border: 2rpx solid red; */
  position: absolute;
  top: 7.5vh;
  left: 50vw;
  height: 8vh;
  width: 32vw;
  border-radius:60rpx;
  background: red;
}
 
.world{
  position: absolute;
  height: 70rpx;
  width: 160rpx;
  top: 10rpx;
  left: 40rpx;
}
 
.button_world{
  font-size: 31rpx;
  text-align: center;
  align-items: center;
  color: white;
}
 
.button_submission{
  position: absolute;
  height: 7vh;
  width: 60vw;
  top: 55vh;
  left: 20vw;
  /* border: 2rpx solid red; */
}
 
.button_submissionWorld{
  position: absolute;
  left: 26vw;
  font-size: 35rpx;
  /* border: 2rpx solid red; */
  top: -2rpx;
}

var qcloud = require('../../vendor/wafer2-client-sdk/index')
var config = require('../../config')
var util = require('../../utils/util.js')
 
Page({
  data: {
    VerificationCode: '',
    text:'获取验证码',//按钮文字
    currentTime: 61, //倒计时
    disabled: false, //按钮是否禁用
    tel: '' //获取到的手机栏中的值
  },
 
  // 手机号监听输入
  watchTel: function (event) {
    console.log(event);
    this.data.tel = event.detail.value
    this.setData({
      tel: event.detail.value
    })
  },
 
  // 验证码监听输入
  watchVerificationCode: function (event) {
    console.log(event);
    this.data.VerificationCode = event.detail.value
    this.setData({
      VerificationCode: event.detail.value
    })
  },
 
  //提交修改密码表单
  ChangeTel: function () {
    var that = this
    if (this.data.VerificationCode != 10086) {
      wx.showToast({
        icon: 'none',
        title: '验证码输入错误！'
      })
    }
    else {
      util.showBusy('请求中...')
      that.data.userpwd = that.data.renewpwd
      qcloud.request({
        url: `${config.service.host}/weapp/UserChangeTel`,
        header: {
          'content-type': 'application/x-www-form-urlencoded'
        },
        method: "POST",
        data: {
          tel: that.data.tel
        },
        login: false,
        success(result) {
          util.showSuccess('请求成功完成')
          that.setData({
            requestResult: JSON.stringify(result.data)
          })
          console.log(result);
        },
        fail(error) {
          util.showModel('请求失败', error);
          console.log('request fail', error);
        }
      }),
        that.setData({
          tel: '',
          VerificationCode: ''
        })
    }
  },
 
  //获取验证码按钮
  bindButtonTap: function () {
    var that = this;
    that.setData({
      disabled: true, //只要点击了按钮就让按钮禁用 （避免正常情况下多次触发定时器事件）
      color: 'grey',
    })
    var tel = that.data.tel;
    var currentTime = that.data.currentTime
    //把手机号跟倒计时值变例成js值
    var warn = null;
    //warn为当手机号为空或格式不正确时提示用户的文字，默认为空
    if (tel == '') {
      warn = "号码不能为空";
    }
    else if (tel.trim().length != 11 || !/^1[3|4|5|6|7|8|9]\d{9}$/.test(tel)) {
      warn = "手机号格式不正确";
    }
    else {
      //当手机号正确的时候提示用户短信验证码已经发送
      wx.showToast({
        title: '短信验证码已发送',
        icon: 'none',
        duration: 2000
      });
      //设置一分钟的倒计时
      var interval = setInterval(function () {
        currentTime--;
        //每执行一次让倒计时秒数减一
        that.setData({
          text: currentTime + 's', //按钮文字变成倒计时对应秒数
        })
        //如果当秒数小于等于0时 停止计时器 且按钮文字变成重新发送 且按钮变成可用状态 倒计时的秒数也要恢复成默认秒数 即让获取验证码的按钮恢复到初始化状态只改变按钮文字
        if (currentTime <= 0) {
          clearInterval(interval)
          that.setData({
            text: '重新发送',
            currentTime: 61,
            disabled: false,
            color: 'red'
          })
        }
      }, 1000);
    };
    //判断 当提示错误信息文字不为空 即手机号输入有问题时提示用户错误信息 并且提示完之后一定要让按钮为可用状态 因为点击按钮时设置了只要点击了按钮就让按钮禁用的情况
    if (warn != null) {
      wx.showModal({
        title: '提示',
        content: warn
      })
      that.setData({
        disabled: false,
        color: 'red'
      })
      return;
    };
  },
 
})