很简单
的背景由一个名为HomeBackground的小部件管理。所以我只想从浮动操作按钮中获得一些属性。
以下是背景：

class _IconsBackground extends StatefulWidget {

final bool isLoading;
  final IconData firstIcon;
  const _IconsBackground({required this.firstIcon, required this.isLoading});

  @override
  State<_IconsBackground> createState() => _IconsBackgroundState();
}

class _IconsBackgroundState extends State<_IconsBackground> {
  bool isDarkMode = false;
  Color iconsColor = AppTheme.primary;
  List<Color> background = [
    const Color.fromARGB(255, 234, 231, 231),
    Colors.grey
  ];

  swtichTheme() {
    isDarkMode = !isDarkMode;
    if (isDarkMode) {
      iconsColor = Colors.white;
      background = const [
        Color.fromARGB(255, 64, 64, 64),
        Color.fromARGB(255, 0, 0, 0)
      ];
    } else {
      iconsColor = AppTheme.primary;
      background = [const Color.fromARGB(255, 234, 231, 231), Colors.grey];
    }
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Container( // more things

因此，switchTheme（）方法应该从主屏幕中的浮动操作按钮调用：

class HomeScreen extends StatelessWidget {
  const HomeScreen({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final BlogsProvider provider = Provider.of<BlogsProvider>(context);
    
    return Scaffold(
        appBar: const BlogAppBar(),
        floatingActionButton: const **_UserActionsButton()**,
        body: **HomeBackground**(
            firstIcon: Icons.chat,
            isLoading: false,
            child: RefreshIndicator(
              onRefresh: () async {
                provider.getBlogs();
              },
              child: SingleChildScrollView(
                physics: const AlwaysScrollableScrollPhysics(),
                child: Column(
                  children: _loadBlogs(provider),
                ),
              ),
            )));
  
    }

    List<BlogCard> _loadBlogs(BlogsProvider provider) {
        List<Blog> blogsSorted = provider.blogs;
        blogsSorted.sort((a, b) => a.created.compareTo(b.created));
        return blogsSorted.reversed.toList().map((e) => BlogCard(blog: e)).toList();
      }
    }

我该如何解决这个问题？