74 lines
1.9 KiB
Dart
74 lines
1.9 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:webview_flutter/webview_flutter.dart';
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import '../../../components/appbar.dart';
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class HelpPage extends StatefulWidget {
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const HelpPage({super.key});
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@override
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State<HelpPage> createState() => _HelpPageState();
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}
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class _HelpPageState extends State<HelpPage> with AutomaticKeepAliveClientMixin {
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// 添加静态 controller
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static WebViewController? _staticController;
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late final WebViewController _controller;
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bool _isLoading = true;
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@override
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void initState() {
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super.initState();
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// 如果已经有静态 controller，直接使用
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if (_staticController != null) {
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_controller = _staticController!;
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_isLoading = false;
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} else {
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_controller = WebViewController()
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..setJavaScriptMode(JavaScriptMode.unrestricted)
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..setBackgroundColor(Colors.white)
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..setNavigationDelegate(
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NavigationDelegate(
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onPageFinished: (String url) {
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if (mounted) {
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setState(() {
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_isLoading = false;
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});
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}
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},
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onNavigationRequest: (NavigationRequest request) {
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return NavigationDecision.navigate;
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},
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),
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)
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..loadFlutterAsset('assets/chatwoot.html');
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// 保存到静态变量
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_staticController = _controller;
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}
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}
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@override
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Widget build(BuildContext context) {
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// 必须调用 super.build
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super.build(context);
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return Scaffold(
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resizeToAvoidBottomInset: false,
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appBar: const CustomAppBar(title: '帮助中心'),
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body: Stack(
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children: [
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WebViewWidget(controller: _controller),
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if (_isLoading)
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const Center(
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child: CircularProgressIndicator(),
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),
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],
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),
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);
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}
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// 实现 wantKeepAlive
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@override
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bool get wantKeepAlive => true;
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} |