Flutter 吸顶Scroll View

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效果如下:

  • 分为三部分，上部，中部，下部。
  • 上部为 header 部分，不吸顶。
  • 中部吸顶。
  • 下部为 SubPages 部分，可以左右滑动切换页面子页面。
home_scroll.view.dart
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import 'package:flutter/material.dart';
import 'package:get/get.dart';

class HomeScrollView extends GetView {
  final Widget top;
  final Widget header;
  final List<Widget> subPages;

  const HomeScrollView(
      {super.key,
      required this.top,
      required this.subPages,
      required this.header});

  @override
  Widget build(BuildContext context) {
    return Material(
      child: DefaultTabController(
          length: 5,
          child: Column(
            children: [
              Expanded(
                  child: NestedScrollView(
                      headerSliverBuilder:
                          (BuildContext context, bool innerBoxIsScrolled) {
                        return <Widget>[top, header];
                      },
                      body: TabBarView(
                        physics: NeverScrollableScrollPhysics(),
                        children: subPages,
                      )))
            ],
          )),
    );
  }
}
home.view.dart
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import 'package:animated_toggle_switch/animated_toggle_switch.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart';
import 'package:rflutter_alert/rflutter_alert.dart' as Alert;
import 'package:uTrading/config/log_config.dart';
import 'package:uTrading/config/super_theme.dart';
import 'package:uTrading/controller/countdown.controller.dart';
import 'package:uTrading/page/home/views/home_scroll.view.dart';
import 'package:uTrading/page/home/views/ranking_list.view.dart';
import 'package:uTrading/page/home/widgets/menu_icon_widget.dart';
import 'package:uTrading/page/home/widgets/ranking_header_widget.dart';
import 'package:uTrading/widget/u_text.dart';

import 'home.controller.dart';

class HomeView extends GetView {
  const HomeView({super.key});

  @override
  Widget build(BuildContext context) {
    Get.put(CountdownController());
    HomeController controller = Get.put(HomeController());

    var headerSwitch = Padding(
      padding: EdgeInsets.fromLTRB(16.w, 9.h, 16.w, 9.h),
      child: Center(
        child: SizedBox(
            height: 32.h,
            width: 200.w,
            child: Obx(
              () => AnimatedToggleSwitch.size(
                current: controller.appIsCEX.value,
                values: const [true, false],
                iconOpacity: 1,
                indicatorSize: Size.fromWidth(99.w),
                customIconBuilder: (context, local, global) => Text(
                  local.value ? 'CEX' : 'DEX',
                  style: TextStyle(
                      color: Color.lerp(Color(0xff999999), Color(0xff333333),
                          local.animationValue),
                      fontWeight: FontWeight.lerp(FontWeight.normal,
                          FontWeight.bold, local.animationValue)),
                ),
                borderWidth: 5,
                iconAnimationType: AnimationType.onHover,
                style: ToggleStyle(
                  indicatorColor: Color(0xffffc300),
                  borderColor: Colors.transparent,
                  borderRadius: BorderRadius.circular(32.r),
                ),
                selectedIconScale: 1,
                onChanged: (value) => controller.toggleAppType(),
              ),
            )),
      ),
    );

    var headerRightIcon = Positioned(
      top: 0,
      bottom: 0,
      right: 16.w,
      child: Center(
          child: InkWell(
        onTap: () {},
        child: Image.asset('assets/images/announce_line_black.png',
            width: 20.w, height: 20.w),
      )),
    );

    return HomeScrollView(
        top: SliverToBoxAdapter(
          child: Container(
            decoration: BoxDecoration(
                image: DecorationImage(
                    fit: BoxFit.cover,
                    image: AssetImage('assets/images/home_top_bg.png'))),
            child: Column(
              children: [
                // 刘海屏
                SizedBox(height: MediaQuery.of(context).padding.top),

                // 顶部区域
                Stack(
                  children: [
                    headerSwitch,
                    headerRightIcon,
                  ],
                ),

                // menu icons
                HomeMenuWidget()
              ],
            ),
          ),
        ), // 上部
        header: RankingHeaderWidget(), // 中部
        subPages: [ // 下部
          RankingListWidget(),
          RankingListWidget(),
          RankingListWidget(),
          RankingListWidget(),
          RankingListWidget(),
        ]);
  }
}

class HomeMenuWidget extends StatelessWidget {
  const HomeMenuWidget({
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: EdgeInsets.fromLTRB(0, 16.h, 0, 16.h),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: [
          MenuIconWidget(
              imgPath: 'assets/images/my_profit.png',
              title: 'aa',
              onPressed: () {
                ScaffoldMessenger.of(context)
                    .showSnackBar(SnackBar(content: Text('Click profile')));
              }),
          MenuIconWidget(
              imgPath: 'assets/images/risk_control.png',
              title: 'bb',
              onPressed: () {
                ScaffoldMessenger.of(context)
                    .showSnackBar(SnackBar(content: Text('Click profile')));
              }),
          MenuIconWidget(
              imgPath: 'assets/images/api_binding.png',
              title: 'cc',
              onPressed: () {
                ScaffoldMessenger.of(context)
                    .showSnackBar(SnackBar(content: Text('Click profile')));
              }),
          MenuIconWidget(
              imgPath: 'assets/images/exchange_register.png',
              title: 'dd',
              onPressed: () {
                ScaffoldMessenger.of(context)
                    .showSnackBar(SnackBar(content: Text('Click profile')));
              }),
        ],
      ),
    );
  }
}