Flutter：导航，tab切换，顶部固定，列表分页滚动

1、导航搜索栏：固定
2、tab切换：固定
3、列表分页：滚动

import 'package:demo/common/index.dart';
import 'package:ducafe_ui_core/ducafe_ui_core.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:pull_to_refresh_flutter3/pull_to_refresh_flutter3.dart';
import 'package:tdesign_flutter/tdesign_flutter.dart';

import 'index.dart';

class CardPage extends GetView<CardController> {
  const CardPage({super.key});

  // 头部
  Widget _buildHeader() {
    return <Widget>[
    ].toRow().card(
      color: Colors.white,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(34.w),
      ),
    ).tight(width: 690.w,height: 80.w).marginOnly(top: 30.w,bottom: 30.w);
  }

  // 列表
  Widget _buildList() {
    return SmartRefresher(
      controller: controller.refreshController,
      enablePullUp: true, // 启用上拉加载
      onRefresh: controller.onRefresh, // 下拉刷新回调
      onLoading: controller.onLoading, // 上拉加载回调
      footer: const SmartRefresherFooterWidget(), // 底部加载更多组件
      child: ListView.builder(
        itemCount: 100,
        itemBuilder: (context, index) {
          return Text('列表项 $index');
        },
      ),
    );
  }

  // 主视图
  Widget _buildView() {
    return <Widget>[
      _buildHeader(),
      Expanded(child: _buildList()),
    ].toColumn();
  }

  @override
  Widget build(BuildContext context) {
    return GetBuilder<CardController>(
      init: CardController(),
      id: "card",
      builder: (_) {
        return Scaffold(
          backgroundColor: const Color(0xffF5F5F5),
          appBar: TDNavBar(
            padding: EdgeInsets.only(left: 0,right: 0), // 重写左右内边距
            centerTitle:false, // 不显示标题
            height: 45, // 高度
            titleWidget: <Widget>[
              TDImage(
                assetUrl: 'assets/img/search.png',
                width: 32.w,
                height: 32.w,
              ),
              SizedBox(width: 20.w,),
              <Widget>[
              ].toRow().tight(height: 28.w).decorated(
                border: Border(
                  left: BorderSide(color: const Color(0xffe9e9e9),width: 1.w),
                ),
              ),
              SizedBox(width: 20.w,),
              TextWidget.body('搜索心仪的商品',color: const Color(0xff999999),size: 28.sp,),
            ].toRow().paddingHorizontal(30.w).card(
              color: Colors.white,
              shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(34.w),
              ),
            ).tight(height: 68.w),
            backgroundColor:  const Color(0xffE93323), // 背景
            screenAdaptation: true, // 默认true，适配手机状态栏高度
            useDefaultBack: false, // 显示左侧返回按键
          ),
          body: SafeArea(
            child: _buildView()
          ),
        );
      },
    );
  }
}