当我尝试在同一小部件​​中创建sliver应用程序栏和pageview时问题

Question

在使用应用程序时，我在逻辑方面面临问题 我想要一个带有sliver appbar，并在同一小部件​​中使用页面视图 执行此操作并为我的页面浏览量的每个页面分配自定义滚动视图，我会遇到问题，但是如果我在页面的每个页面上声明了一个sliver应用程序栏，则可以正常工作，与此同时，我的页面浏览量不应该在pageview中具有嵌套的滚动视图小部件现在我不认为我应该为其中的每个栏编写一个应用程序栏 任何想法 这是我的代码

Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        top: true,
        bottom: false,
        child:
         NestedScrollView(
          floatHeaderSlivers: true,
            headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
              return <Widget>[
                  SliverOverlapAbsorber(
                    handle: NestedScrollView.sliverOverlapAbsorberHandleFor(
                        context),         
        sliver:
               SliverAppBar(
        // toolbarHeight: 50,
        backgroundColor: Color.fromRGBO(255, 255, 255, 1),
        title: const Text(
          'Partnerna',
          style: TextStyle(
              fontSize: 21,
              fontWeight: FontWeight.bold,
              fontStyle: FontStyle.normal,
              color: linerColorUp),
        ),
        actions: [
          Padding(
            padding: const EdgeInsets.symmetric(
                vertical: 0, horizontal: 10),
            child: Container(
              alignment: Alignment.centerRight,
              // color: Colors.amber,
              // width: double.infinity,
              child: Row(
                mainAxisAlignment: MainAxisAlignment.end,
                children: const [
                  CircelCntainerBackgroundWidget(
                      backGroundColor: buttonbackgroundcolor,
                      child: Padding(
                        padding: EdgeInsets.all(3),
                        child: FaIcon(
                          FontAwesomeIcons.squarePlus,
                          size: 18,
                        ),
                      )),
                  SizedBox(
                    width: 20,
                  ),
  
              CircelCntainerBackgroundWidget(
                  backGroundColor: buttonbackgroundcolor,
                  child: Icon(
                    Icons.notification_add_rounded,
                    size: 21,
                  )),
              SizedBox(
                width: 20,
              ),
  
              // SizedBox(width: 10,),
              CircleAvatar(
                radius: 14,
                backgroundImage: NetworkImage(
                    "https://th.bing.com/th/id/OIP.2tWiaVWFJjvC1HhJQuTtCwHaHt?w=173&h=181&c=7&r=0&o=5&pid=1.7"),
              ),
            ],
          ),
        ),
      )
    ],
    // expandedHeight: 200,
    floating: true,
    pinned: false,
    snap: true,
    forceElevated: innerBoxIsScrolled,
    elevation: 0,
      ),
              )];
        },
        body:
           PageView(
            children: [
              HomeScreen(),
              ConnectScreen(),
              ConnectRequestScreen(),
              MessagScrenn(),
              SettingScreen(),
            ],
            physics: const NeverScrollableScrollPhysics(),
            controller: pageController,
            onPageChanged: onPageChange,
          ),
  ),),

Answer 1

尝试制作与代码相同的自定义脚手架，以包装每个页面浏览量的孩子。

class MyHomePage extends StatefulWidget {
  const MyHomePage({
    Key? key,
  }) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: PageView(
        children: [
          Page1(),
          Page2(),
          Page3(),
        ]
      ),
    );
  }
}

class Page1 extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    return CustomScaffold(
      body: (...)
    );
  }
}

class Page2 extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    return CustomScaffold(
      body: (...)
    );
  }
}

class Page3 extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    return CustomScaffold(
      body: (...)
    );
  }
}

class CustomScaffold extends StatefulWidget {
  final Widget body;
  const CustomScaffold({ Key? key, required this.body}) : super(key: key);

  @override
  _CustomScaffoldState createState() => _CustomScaffoldState();
}

class _CustomScaffoldState extends State<CustomScaffold> {
  
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: NestedScrollView(
        headerSliverBuilder: (context, innerBoxIsScrolled){
          (...)
        },
        body: widget.body,
      ),
    );
  }
}