我不知道你是否找到了答案，但这两个选择对我很有效：cacheExtent，shrinkWrap false。您可以增加或减少cacheExtent。我敢肯定，如果它太多了，它会消耗太多的内存，因为列表生成器在构建和销毁时会为您管理内存。

CustomScrollView(
    cacheExtent: 3500,
    shrinkWrap: false,
    controller: _scrollController,
    slivers: <Widget>[
      SliverGrid(
        gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 3,
          mainAxisSpacing: 1.5,
          crossAxisSpacing: 1.5,
          childAspectRatio: 0.7,
        ),

使用** Package 类概念**。这是一个漫长的解决方案。但是你可以根据你的需要定制，使它更短。

Widget decorationImage() {
        return DecorationImage(
            fit: BoxFit.fill,
            image: CachedNetworkImageProvider(
            "https://source.unsplash.com/${150}/${150 + index}/",
            );
    }

Package 类：

class CustomSliverGrid extends StatelessWidget {
  Widget _widget;
  CustomSliverGrid(this._widget);

  @override
  Widget build(BuildContext context) {
    return SliverGrid(
      gridDelegate: SliverGridDelegateWithMaxCrossAxisExtent(
        maxCrossAxisExtent: 150,
        childAspectRatio: 1 / 1,
        crossAxisSpacing: 4.0,
        mainAxisSpacing: 4.0,
      ),
      delegate: SliverChildBuilderDelegate(
            (BuildContext context, int index) {
          return ClipRRect(
              borderRadius: BorderRadius.circular(5.0),
              child: Container(
                alignment: Alignment.bottomRight,
                padding: EdgeInsets.all(10.0),
                decoration: BoxDecoration(
                  image: _widget,
                ),
                child: index == (index / 2) + 1
                    ? Icon(
                  Icons.burst_mode,
                  color: AppTheme.fullWhite,
                )
                    : index == (index / 6)
                    ? Icon(
                  Icons.play_circle_filled,
                  color: AppTheme.fullWhite,
                )
                    : Container(),
              ));
        },
        childCount: childCount,
      ),
    );
  } 
}

在代码中将该类用作：

class YourWidgetPlace extends StatelessWidget {

    Widget decorationImage() {
      return DecorationImage(
          fit: BoxFit.fill,
          image: CachedNetworkImageProvider(
          "https://source.unsplash.com/${150}/${150 + index}/",
      );
    } 
    
    @override
    Widget build(BuildContext context) {
      return CustomSliverGrid(decorationImage());
    }
}

您可以重置此全局配置

PaintingBinding.instance?.imageCache?.maximumSize = 5000;
PaintingBinding.instance?.imageCache?.maximumSizeBytes = 300 << 20;