Flutter SilverList 列表项之间的分隔符/分隔符

Question

使用 ListView.separated 我们可以在列表项之间添加 Divider()，但是，一旦我转换到 SliverList，我就看不到我的分隔线。

delegate: SliverChildBuilderDelegate(
            // displays the index of the current item.
            (context, index) => new ListTile(
              title: Text(_sagItems[index].manufacturer, style: TextStyle(fontSize: 18),),
              subtitle: Text(_sagItems[index].model, style: TextStyle(fontSize: 16)),
                onTap: () {
                  Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (context) => DetailScreen(sagitem: _sagItems[index]),
                    ),
                  );
                },
              ),
              //DIVIDER NOT WORKING HERE
              Divider(color: Colors.blueGrey),
              childCount: _sagItems.length,
          ),

用 SliverList 添加分隔线的关键是什么？

Answer 1

你可以这样做：

      delegate: SliverChildBuilderDelegate(
            (BuildContext context,int index){
              if(index.isOdd){
                return Divider(color: Colors.blueGrey);
              }
              return ListTile(
              title: Text(_sagItems[index~/2].manufacturer, style: TextStyle(fontSize: 18),),
              subtitle: Text(_sagItems[index~/2].model, style: TextStyle(fontSize: 16)),
                onTap: () {
                  Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (context) => DetailScreen(sagitem: _sagItems[index~/2]),
                    ),
                  );
                },
              );

              },
             childCount: (_sagItems.length * 2)-1,
          ),