fix[litemall-wx]: 解决iOS下点击购物车按钮后底部按钮消失问题。

litemall-wx/pages/goods/goods.wxml

@@ -130,7 +130,8 @@
       </view>
     </view>
   </view>
-  <view class="bottom-btn">
+</scroll-view>
+<view class="bottom-btn">
   <view class="l l-collect {{ openAttr ? 'back' : ''}}" bindtap="closeAttrOrCollect">
     <image class="icon" src="{{ collectBackImage }}"></image>
   </view>
@@ -143,5 +144,4 @@
   <view class="c" bindtap="addFast" wx:if="{{!soldout}}">立即购买</view>
   <view class="r" bindtap="addToCart" wx:if="{{!soldout}}">加入购物车</view>
   <view class="n" wx:if="{{soldout}}">商品已售空</view>
-  </view>
-</scroll-view>
+</view>
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