Fix：4127 【商城小程序】订单结算页面的优惠详情弹窗—勾选其他优惠券后点击【×】关闭按钮，再次打开弹窗会显示勾选新选择的优惠券

pages/order/OrderSubmission/index.vue

@@ -130,7 +130,7 @@
               <text class="v12-dark-text v12-font-24" >{{ couponList.usable.length === 0 ? '无' : '去选择' }}</text>
               <text class="iconfont icon-jiantou v12-font-24 v12-dark-text"></text>
             </view> -->
-            <view class="v12-secondary-dark-text v12-align-center" @click="changeCoupons">
+            <view class="v12-secondary-dark-text v12-align-center" @click="showCouponsPopup">
               <text class="v12-font-22 ">-￥</text>
               <text class="v12-font-28">{{ force2Decimal(orderPrice.couponPrice) }}</text>
               <text class="iconfont icon-jiantou v12-font-24 v12-dark-text"></text>
@@ -255,20 +255,21 @@
     </view>
     <!-- v9 优惠券开始 -->
     <u-popup
+      v-if="show"
       :show="show"
       :round="10"
       mode="bottom"
       close-on-click-overlay
-      @close="changeCoupons"
+      @close="close"
     >
       <CouponsPopup
-        v-if="couponList.usable.length > 0"
+        v-if="couponList.usable.length > 0 && show"
         :two-list="couponList"
         @change="changeCoupons"
         @close="close"
         :currentPrice="force2Decimal(orderPrice.totalPrice)"
         :id="couponId"
-        @max="couponMax"
+        :couponId1="couponId"
         :show-tab="false"
       />
     </u-popup>
@@ -473,7 +474,7 @@ export default {
       postOrderComputed(this.orderGroupInfo.orderKey, {
         addressId: this.addressInfo.id,
         useIntegral: this.useIntegral ? 1 : 0,
-        couponId: this.couponList.usable.length === 0 ? 0 : this.couponId || 0,
+        couponId: this.couponList.usable.length === 0 ? 0 : this.couponId,
         usePoints: this.usePointsCheck ? 1 : 0,
         shipping_type: parseInt(this.shipping_type) + 1
       }).then(res => {
@@ -800,6 +801,9 @@ export default {
     close() {
       this.show = !this.show
     },
+    showCouponsPopup() { 
+      this.show = !this.show
+    },
     // v9-2
     changeCoupons(item) {
       if(!item) return