微信小程序如何获取手机验证码

<view class=\'changeInfo\'>
 <view class=\'changeInfoName\'>
   <input placeholder=\'请输入姓名\' bindinput=\'getNameValue\' value=\'{{name}}\'/> 
 </view>
 
 <view class=\'changeInfoName\'>
   <input placeholder=\'请输入手机号\' bindinput=\'getPhoneValue\' value=\'{{phone}}\'/> 
 </view>
 <view class=\'changeInfoName\'>
   <input placeholder=\'请输验证码\' bindinput=\'getCodeValue\' value=\'{[code]}\' style=\'width:70%;\'/> 
   <button class=\'codeBtn\' bindtap=\'getVerificationCode\' disabled=\'{{disabled}}\' >{{codename}}</button>
 </view>
 <button class=\'changeBtn\' bindtap=\'save\'>保存</button>
</view>

page{
 height: 100%;
 width: 100%;
 background: linear-gradient(#5681d7, #486ec3);
}
.changeInfo{
 display: flex;
 flex-direction: column;
 justify-content: space-between;
 width: 90%;
 margin: 50rpx auto;
}
.changeInfoName{
 position: relative;
 height: 80rpx;
 width: 100%;
 border-radius: 10rpx;
 background: #fff;
 margin-bottom: 20rpx;
 padding-left: 20rpx;
 box-sizing: border-box;
}
.codeBtn{
 position: absolute;
 right: 0;
 top: 0;
 color: #bbb;
 width: 30%;
 font-size: 26rpx;
 height: 80rpx;
 line-height: 80rpx;
}
.changeInfoName input{
 width: 100%;
 height:100%;
}
.changeBtn{
 width: 40%;
 height: 100rpx;
 background: #fff;
 color: #000;
 border-radius: 50rpx;
 position: absolute;
 bottom: 10%;
 left: 50%;
 margin-left: -20%;
 line-height: 100rpx;
}

var app = require(\'../../resource/js/util.js\');
Page({
 /**
  * 页面的初始数据
  */
 data: {
  name:\'\',//姓名
  phone:\'\',//手机号
  code:\'\',//验证码
  iscode:null,//用于存放验证码接口里获取到的code
  codename:\'获取验证码\'
 },
 //获取input输入框的值
 getNameValue:function(e){
  this.setData({
   name:e.detail.value
  })
 },
 getPhoneValue:function(e){
  this.setData({
   phone:e.detail.value
  })
 },
 getCodeValue: function (e) {
  this.setData({
   code: e.detail.value
  })
 },
 getCode:function(){
  var a = this.data.phone;
  var _this = this;
  var myreg = /^(14[0-9]|13[0-9]|15[0-9]|17[0-9]|18[0-9])\\d{8}$$/;
  if (this.data.phone == \"\") {
   wx.showToast({
     : \'手机号不能为空\',
    icon: \'none\',
    duration: 1000
   })
   return false;
  } else if (!myreg.test(this.data.phone)) {
   wx.showToast({
     : \'请输入正确的手机号\',
    icon: \'none\',
    duration: 1000
   })
   return false;
  }else{
   wx.request({
    data: {},
    \'url\': 接口地址,
    success(res) {
     console.log(res.data.data)
     _this.setData({
      iscode: res.data.data
     })
     var num = 61;
     var timer = setInterval(function () {
      num--;
      if (num <= 0) {
       clearInterval(timer);
       _this.setData({
        codename: \'重新发送\',
        disabled: false
       })
 
      } else {
       _this.setData({
        codename: num + \"s\"
       })
      }
     }, 1000)
    }
   })
   
  }
  
  
 },
 //获取验证码
 getVerificationCode() {
  this.getCode();
  var _this = this
  _this.setData({
   disabled: true
  })
 },
 //提交表单信息
 save:function(){
  var myreg = /^(14[0-9]|13[0-9]|15[0-9]|17[0-9]|18[0-9])\\d{8}$$/;
  if(this.data.name == \"\"){
   wx.showToast({
     : \'姓名不能为空\',
    icon: \'none\',
    duration: 1000
   })
   return false;
  }
  if(this.data.phone == \"\"){
   wx.showToast({
     : \'手机号不能为空\',
    icon: \'none\',
    duration: 1000
   })
   return false;
  }else if(!myreg.test(this.data.phone)){
   wx.showToast({
     : \'请输入正确的手机号\',
    icon: \'none\',
    duration: 1000
   })
   return false;
  }
  if(this.data.code == \"\"){
   wx.showToast({
     : \'验证码不能为空\',
    icon: \'none\',
    duration: 1000
   })
   return false;
  }else if(this.data.code != this.data.iscode){
   wx.showToast({
     : \'验证码错误\',
    icon: \'none\',
    duration: 1000
   })
   return false;
  }else{
   wx.setStorageSync(\'name\', this.data.name);
   wx.setStorageSync(\'phone\', this.data.phone);
   wx.redirectTo({
    url: \'../add/add\',
   })
  }
 },
 /**
  * 生命周期函数--监听页面加载
  */
  : function (options) {
  
 },
 
 /**
  * 生命周期函数--监听页面初次渲染完成
  */
 onReady: function () {
 
 },
 
 /**
  * 生命周期函数--监听页面显示
  */
 onShow: function () {
 
 },
 
 /**
  * 生命周期函数--监听页面隐藏
  */
 onHide: function () {
 
 },
 
 /**
  * 生命周期函数--监听页面卸载
  */
  : function () {
 
 },
 
 /**
  * 页面相关事件处理函数--监听用户下拉动作
  */
 onPullDownRefresh: function () {
 
 },
 
 /**
  * 页面上拉触底事件的处理函数
  */
 onReachBottom: function () {
 
 },
 
 /**
  * 用户点击右上角分享
  */
 onShareAppMessage: function () {
 
 }
})