Gridview在flutter中的Listview下不起作用

ListView(
  children: [
    Expanded(
      child: GridView.count(
        crossAxisCount: 2,
        children: [
          // GridView的子组件
        ],
      ),
    ),
  ],
)

ListView(
  children: [
    CustomScrollView(
      slivers: [
        SliverGrid(
          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
            crossAxisCount: 2,
          ),
          delegate: SliverChildBuilderDelegate(
            (BuildContext context, int index) {
              return Container(
                // GridView的子组件
              );
            },
            childCount: 4, // 子组件数量
          ),
        ),
      ],
    ),
  ],
)

ListView(
  children: [
    GridView.builder(
      physics: NeverScrollableScrollPhysics(),
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
        crossAxisCount: 2,
      ),
      itemBuilder: (BuildContext context, int index) {
        return Container(
          // GridView的子组件
        );
      },
      itemCount: 4, // 子组件数量
    ),
  ],
)