Fix：4739 【商城小程序】送礼包界面，点击数量弹出键盘，点击空白处收起键盘时屏幕出现闪屏现象

pkg_user/views/gift/gift.vue

@@ -24,7 +24,7 @@
             </view>
             <view v-if="!isGroupBuy">
               <u-number-box
-                v-if="!isPayOk"
+                v-if="showInput"
                 v-model="goodsInfo.cartNum"
                 :max="goodsInfo['productInfo']['attrInfo']['stock']"
                 integer
@@ -243,7 +243,8 @@ export default {
       showPopup: false,
       blindImage: '',
       isGroupBuy: false,
-      popupCover: ''
+      popupCover: '',
+      showInput: true
     }
   },
   watch: {
@@ -400,9 +401,9 @@ export default {
     },
     numberBlur(e) {
       console.log(e);
-      this.isPayOk = true
+      this.showInput = false
       setTimeout(() => {
-        this.isPayOk = false 
+        this.showInput = true 
       },10)
       this.$forceUpdate()
     },