Flutter 返回分类选项卡和项目的列表

Question

我是 Flutter 的新手，我正在尝试像本例中那样实现菜单 https://pub.dev/packages/scrollable_list_tabview，我有如下结构的食物数组，所以我需要在水平选项卡中显示类别，在垂直列表中显示食物项目，所以我需要在其类别标签下以及在其类别选项卡下显示项目，我认为它应该按类别ID分组，但我不知道该怎么做，我也设置了高度（expandedHeight：600 ,) 手动，但我确定可以自动完成，请帮助

                SliverAppBar( // <-- app bar for custom sticky menu
                    backgroundColor: Colors.white,
                    automaticallyImplyLeading: false,
                    elevation: 0.0,
                    expandedHeight: 600,
                    // <-- doesn't work for minimum height setup
                    flexibleSpace: ScrollableListTabView(
                      tabHeight: 50,
                      bodyAnimationDuration: const Duration(milliseconds: 150),
                      tabAnimationCurve: Curves.easeOut,
                      tabAnimationDuration: const Duration(milliseconds: 200),
                      tabs: [
                        ScrollableListTab(
                            tab: ListTab(
                                label: Text('Label 1'),
                                icon: Icon(Icons.group),
                                showIconOnList: false),
                            body: ListView.builder(
                              shrinkWrap: true,
                              physics: NeverScrollableScrollPhysics(),
                              itemCount: _con.categories.length,
                               itemBuilder: (context, index) {
                                return ListTile(
                                  leading: Container(
                                    height: 40,
                                    width: 40,
                                    decoration: BoxDecoration(
                                        shape: BoxShape.circle,
                                        color: Colors.grey),
                                    alignment: Alignment.center,
                                    child: Text(index.toString()),
                                  ),
                                  title: Text('List element $index'),
                                );

                              }
                            ))
                      ],
                    ),
                ),

数组结构：

  "data": [
      {
        "id": 1,
        "name": "American fried rice",
        "price": 11,
        "category_id": 1,
        "category": {
          "id": 1,
          "name": "Grains",
        },
      },


      {
        "id": 5,
        "name": "Pizza Valtellina",
        "price": 7.4,
        "category_id": 1,
       
        "category": {
          "id": 1,
          "name": "Grains",
          "has_media": true,
        },
      },
     
      }
    ],

Answer 1

您的情况的最佳解决方案是使用这些包：

scroll_to_index: ^2.0.0 
rect_getter: ^1.0.0 

请关注这个项目 https://gist.github.com/debuggerx01/49f108d68ed903458e9478b4f0c186f4