PagewiseGridView abnormal exita

[dufei816]

PagewiseGridView.count
Android/IOS
Fast sliding app abnormal exita

---------------------------------code----------------------------------------

RefreshIndicator(
          onRefresh: () async {
            Provider.of<MaterialCategoryViewModel>(context, listen: false).refresh();
            controller.reset();
          },
          child: Consumer<bool>(builder: (_, data, __) {
            if (data) {
              return EmptyWidget(
                content: 'not item',
              );
            } else {
              return PagewiseGridView<MaterialItem>.count(
                addAutomaticKeepAlives: false,
                pageLoadController: controller,
                loadingBuilder: (_){
                  return Column(
                    children: [
                      Padding(
                        padding: EdgeInsets.only(top: 26.h),
                        child: CircularProgressIndicator(),
                      ),
                    ],
                  );
                },
                crossAxisSpacing: 20.w,
                mainAxisSpacing: 20.w,
                childAspectRatio: 1,
                crossAxisCount: 2,
                itemBuilder: (context, entity, index) {
                  return InkWell(
                    onTap: () {
                      Navigator.of(context).pushNamed(Routes.material_detail, arguments: entity.id);
                    },
                    child: Container(
                      child: CachedNetworkImage(
                        imageUrl: ImageUrlUtil.getUrl(entity.cover),
                        fit: BoxFit.cover,
                      ),
                    ),
                  );
                },
              );
            }
          }),
        );