更新

pages/coupon/coupon.js

     coupon_name: '', //优惠券名称
     couponTime: '', //优惠券购买时间
     code_num: '', //核销短信验证码
-    couponCode:'',//券号
-    couponType:'',//券类型
-    duration:'',//券期间
+    couponCode: '', //券号
+    couponType: '', //券类型
+    duration: '', //券期间
+  },
+  /**
+   * 核销数修改
+   */
+  changeNums(event) {
+    var nums
+    if (event.detail.value > this.data.totalNums) {
+      nums = this.data.totalNums
+    }
+    if (event.detail.value < 1) {
+      nums = 1
+    }
+    this.setData({
+      nums: nums
+    })
   },
   /**
    * 验证码修改
       return
     }
     var data;
-    if (this.data.type==1){//券核销
+    if (this.data.type == 1) { //券核销
       data = {
         check_type: 1,
         coupon_code: this.data.couponCode,
         check_num: 1
       }
-    }else{//手机号核销
+    } else { //手机号核销
       if (this.data.code_num.length != 6) {
         wx.showToast({
           title: '验证码错误',
     this.setData({
       state: 1
     })
-    var that=this;
+    var that = this;
     app.requestPost('couponbuy/check', data, res => {
       var state;
       if (res.code == 200) {
         state = 2;
-        if (that.data.type == 2) {//手机号核销
+        if (that.data.type == 2) { //手机号核销
           wx.switchTab({
             url: '../record/record'
           })
   /**
    * 返回核销大厅
    */
-  goHome(){
+  goHome() {
     wx.switchTab({
       url: '../home/home'
     })
     if (code) { //券码查询
       this.setData({
         type: 1,
-        couponCode:code,
+        couponCode: code,
         coupon_name: couponData.coupon_name,
         couponTime: couponData.buy_date,
         couponType: couponData.coupon_type,
       /**
        * 发送验证码
        */
-      app.requestGet('couponbuy/check/smscode', { user_phone: pohone},res=>{
-        if(res.code==200){
-        }else{
+      app.requestGet('couponbuy/check/smscode', {
+        user_phone: pohone
+      }, res => {
+        if (res.code == 200) {} else {
           wx.showToast({
             title: res.message,
             icon: 'none',

pages/coupon/coupon.wxml

       <input placeholder="输入短信验证码" placeholder-style="color:#FFFFFF;font-size:30rpx;" value="{{code_num}}" bindinput="changeCode"></input>
       <view class="countBox">
         <text>核销</text>
-        <view class="countContent">{{nums}}
+        <view class="countContent">
+          <input type="number" value="{{nums}}" bindinput="changeNums"></input>
           <image class="symbolBox" src="../../static/coupon/symbolLeft.png" style="left:-5rpx;" bindtap="reduceCoupon"></image>
           <image class="symbolBox" src="../../static/coupon/symbolRight.png" style="right:-5rpx;" bindtap="addCoupon"></image>
         </view>

pages/coupon/coupon.wxss

   display: inline-block;
   margin-left: 25rpx;
 }
+#vCodeBox>.countBox>.countContent>input{
+  position: relative;
+  width: 100%;
+  height: 100%;
+  text-align: center;
+  line-height: 44rpx;
+}
 #vCodeBox>.countBox>.countContent>.symbolBox{
   position: absolute;
   text-align: center;