import 'dart:async'; import 'dart:io'; import 'package:flutter/material.dart'; import 'package:flutter_styled_toast/flutter_styled_toast.dart'; import 'package:pikapika/basic/config/Version.dart'; import 'package:pikapika/basic/config/WillPopNotice.dart'; import 'package:pikapika/screens/components/Badge.dart'; import 'package:uni_links/uni_links.dart'; import 'package:uri_to_file/uri_to_file.dart'; import '../basic/Common.dart'; import 'CategoriesScreen.dart'; import 'PkzArchiveScreen.dart'; import 'SpaceScreen.dart'; // MAIN UI 底部导航栏 class AppScreen extends StatefulWidget { const AppScreen({Key? key}) : super(key: key); @override State createState() => _AppScreenState(); } class _AppScreenState extends State { late StreamSubscription _linkSubscription; @override void initState() { versionEvent.subscribe(_onVersion); _linkSubscription = linkSubscript(context); versionEvent.subscribe(_versionSub); versionPop(context); super.initState(); } @override void dispose() { versionEvent.unsubscribe(_onVersion); _linkSubscription.cancel(); versionEvent.unsubscribe(_versionSub); super.dispose(); } _versionSub(_) { versionPop(context); } void _onVersion(dynamic a) { setState(() {}); } static const List _widgetOptions = [ CategoriesScreen(), SpaceScreen(), ]; late int _selectedIndex = 0; void _onItemTapped(int index) { setState(() { _selectedIndex = index; }); } @override Widget build(BuildContext context) { final body = Scaffold( body: IndexedStack( index: _selectedIndex, children: _widgetOptions, ), bottomNavigationBar: BottomNavigationBar( items: [ const BottomNavigationBarItem( icon: Icon(Icons.public), label: '浏览', ), BottomNavigationBarItem( icon: Badged( child: const Icon(Icons.face), badge: latestVersion() == null ? null : "1", ), label: '我的', ), ], currentIndex: _selectedIndex, iconSize: 20, selectedFontSize: 12, unselectedFontSize: 12, onTap: _onItemTapped, ), ); return willPop(body); } int _noticeTime = 0; Widget willPop(Scaffold body) { return WillPopScope( child: body, onWillPop: () async { if (willPopNotice()) { final now = DateTime.now().millisecondsSinceEpoch; if (_noticeTime + 3000 > now) { return true; } else { _noticeTime = now; showToast( "再次返回将会退出应用程序", context: context, position: StyledToastPosition.center, animation: StyledToastAnimation.scale, reverseAnimation: StyledToastAnimation.fade, duration: const Duration(seconds: 3), animDuration: const Duration(milliseconds: 300), curve: Curves.elasticOut, reverseCurve: Curves.linear, ); return false; } } return true; }, ); } }