StaggeredGridView 未定义

Question

导入'包：flutter_staggered_grid_view / flutter_staggered_grid_view.dart'; //导入库

flutter_staggered_grid_view: ^0.5.0 // 包

    Flexible(
      child: Container(
        padding: EdgeInsets.only(top: 16.0, right: 16.0, left: 16.0),
        child: StaggeredGridView.countBuilder(
          physics: NeverScrollableScrollPhysics(),
          padding: EdgeInsets.zero,
          crossAxisCount: 4,
          itemCount: products.length,
          itemBuilder: (BuildContext context, int index) => new ClipRRect(
            borderRadius: BorderRadius.all(Radius.circular(5.0)),
            child: InkWell(
              onTap: () => Navigator.of(context).push(MaterialPageRoute(
                  builder: (_) => ProductPage(product: products[index]))),
              child: Container(
                  decoration: BoxDecoration(
                    gradient: RadialGradient(
                        colors: [
                          Colors.grey.withOpacity(0.3),
                          Colors.grey.withOpacity(0.7),
                        ],
                        center: Alignment(0, 0),
                        radius: 0.6,
                        focal: Alignment(0, 0),
                        focalRadius: 0.1),
                  ),
                  child: Hero(
                      tag: products[index].image,
                      child: Image.asset(products[index].image))),
            ),
          ),
          staggeredTileBuilder: (int index) =>
              StaggeredTile.count(2, index.isEven ? 3 : 2),
          mainAxisSpacing: 4.0,
          crossAxisSpacing: 4.0,
        ),
      ),
    ),

错误：

lib/screens/main/components/recommended_list.dart:51:20：错误：未为“RecommendedList”类定义 getter“StaggeredGridView”。

• “RecommendedList”来自“package:mobi_zilla/screens/main/components/recommended_list.dart”（“lib/screens/main/components/recommended_list.dart”）。尝试将名称更正为现有 getter 的名称，或定义名为“StaggeredGridView”的 getter 或字段。孩子：StaggeredGridView.countBuilder（^^^^^^^^^^^^^^^^^^ lib/screens/main/components/recommended_list.dart:79:19：错误：未定义吸气剂“StaggeredTile”对于“推荐列表”类。
• “RecommendedList”来自“package:mobi_zilla/screens/main/components/recommended_list.dart”（“lib/screens/main/components/recommended_list.dart”）。尝试将名称更正为现有 getter 的名称，或定义名为“StaggeredTile”的 getter 或字段。StaggeredTile.count(2, index.isEven ? 3 : 2), ^^^^^^^^^^^^^^

Answer 1

使用版本：

dependencies:
  flutter_staggered_grid_view: ^0.4.0