图片预览弹窗置顶显示

pages/buyer/index.wxml

@@ -106,7 +106,7 @@
 </view>
 
 <!-- 图片预览弹窗 -->
-<view class="image-preview-mask" wx:if="{{showImagePreview}}" style="position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.9); display: flex; justify-content: center; align-items: center; z-index: 9999;" catchtouchmove="true">
+<view class="image-preview-mask" wx:if="{{showImagePreview}}" style="position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.9); display: flex; justify-content: center; align-items: center; z-index: 10001;" catchtouchmove="true">
   <view style="width: 100%; height: 100%; display: flex; justify-content: center; align-items: center;">
     <swiper 
       style="width: 100%; height: 100%;"