活动：修改成长基金的数据结构

shared/domain/activityField/limitShopField.ts

@@ -12,6 +12,7 @@ export class ShopItem {
     price: number;           //价格
     productID: string;           //商品id
     imageName: string;
+    discount: number;        //折扣
 
     buyCount: number = 0;   //购买过的次数
 
@@ -23,6 +24,7 @@ export class ShopItem {
         this.price = data.price;
         this.productID = data.productID;
         this.imageName = data.imageName;
+        this.discount = data.discount ? data.discount : 0;
         this.buyCount = 0;
     }
 }