mobile_skt/lib/screens/landing/zt_landing.dart

// import 'dart:io';

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import '../../models/app_bottom_nav_item.dart';
import '../../services/app_info.service.dart';
import '../../util/util.dart';

class LandingPage extends StatefulWidget {
  LandingPage({Key? key}) : super(key: key);

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

class _LandingPageState extends State<LandingPage> {
  int _selectedLanding = 0;

  List<BottomNavigationBarItem> bottomNavItems = [];
  List<Widget> pages = [];

  @override
  Widget build(BuildContext context) {
    // ScreenUtil.init(
    //   BoxConstraints(
    //       maxWidth: MediaQuery.of(context).size.width,
    //       maxHeight: MediaQuery.of(context).size.height),
    //   designSize: const Size(414, 896),
    //   orientation: Orientation.portrait,
    //   context: context,
    // );
    List<AppBottomNavItem> roleWithBottomNavItems =
        AppInfoService.to.bottomNavItems!;
    bottomNavItems = roleWithBottomNavItems
        .map((e) => BottomNavigationBarItem(
            icon: e.icon, activeIcon: e.activeIcon, label: e.label))
        .toList();
    pages = roleWithBottomNavItems.map((e) => e.page!).toList();
    return Scaffold(
      bottomNavigationBar: BottomNavigationBar(
        iconSize: ScreenAdaper.sp(40),
        type: BottomNavigationBarType.fixed,
        items: bottomNavItems,
        showSelectedLabels: true,
        showUnselectedLabels: true,
        currentIndex: _selectedLanding,
        onTap: (landing) {
          _onItemTapped(landing);
        },
      ),
      body: pages[_selectedLanding],
    );
  }

  void _onItemTapped(int landing) {
    if (landing != _selectedLanding) {
      setState(() {
        _selectedLanding = landing;
      });
    }
  }
}