class AppProvider with ChangeNotifier {
static List<CategoryModel> categoryModelList = [];
late CategoryModel categoryModel;
Future<void> getCategoryProduct() async {
List<CategoryModel> list = [];
QuerySnapshot querySnapshot =
await FirebaseFirestore.instance.collection("homecategory").get();
querySnapshot.docs.forEach(
(categoryData) {
categoryModel = CategoryModel(
image: categoryData["image"],
name: categoryData["name"],
);
list.add(categoryModel);
},
);
categoryModelList = list;
notifyListeners();
}
List<CategoryModel> get getCategoryModelList {
return categoryModelList;
}
}Widget _buildBottomPart() { return Container( width: double.infinity, height: 240, child: Column( mainAxisAlignment: MainAxisAlignment.end, crossAxisAlignment: CrossAxisAlignment.start, children: [ Container( height: 240, child: ListView.builder( scrollDirection ) : Axis.horizo??ntal, itemCount: AppProvider.getCategoryModelList.length, itemBuilder: (ctx, index) => _buildSingleCategory( name: AppProvider.getCategoryModelList[index].name, image: AppProvider.getCategoryModelList[index].image, ), ), ), ], ), ); }
uj5u.com熱心網友回復：
要么像這樣從 AppProvider 創建一個實體：
AppProvider appProvider = AppProvider();
appProvider.getCategoryModelList.length
或定義 ' getCategoryModelList' 為static List
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