未定义的名称“存储”。尝试将名称更正为已定义的名称，或定义名称

Question

我正在制定一种从 Firebase 存储中检索图像的方法，请告诉我如何解决此错误

Future<List<Map<String, dynamic>>> _loadImage() async {
        List<Map<String, dynamic>> files = [];
    
        final ListResult result = await storage.ref('pizza').list();//Undefined name 'storage'.
    Try correcting the name to one that is defined, or defining the name.
        final List<Reference> allFiles = result.items;
    
        await Future.forEach<Reference>(allFiles, (file) async {
          final String fileUrl = await file.getDownloadURL();
          final FullMetadata fileMeta = await file.getMetadata();
          files.add({
            "url": fileUrl,
          });
        });
    
        return files;
      }

Answer 1

您缺少storage 变量的定义。您是否只是从某个地方将其复制粘贴到您的代码中？尝试改用FirebaseFirestore.instance。