Question

现在我使用 showPerformanceOverlay 来显示 flutter 中的性能信息。但是当在真实设备上运行时，我想关闭性能 UI 而不重新安装 flutter 应用程序。是否可以启用或禁用 showPerformanceOverlay | checkerboardOffscreenLayers | checkerboardRasterCacheImages 在真实设备中？这是我在应用中使用的配置：

return MaterialApp(
        title: 'Cruise',
        theme: currentTheme,
        checkerboardOffscreenLayers: true,
        checkerboardRasterCacheImages: true,
        showPerformanceOverlay: true,
        localizationsDelegates: [
          // ... app-specific localization delegate[s] here
          // TODO: uncomment the line below after codegen
          // AppLocalizations.delegate,
          GlobalMaterialLocalizations.delegate,
          GlobalWidgetsLocalizations.delegate,
          GlobalCupertinoLocalizations.delegate,
          AppLocalizations.delegate
        ],
        supportedLocales: [
          const Locale('en', ''), // English, no country code
          const Locale('ar', ''), // Arabic, no country code
          const Locale.fromSubtags(languageCode: 'zh'), // Chinese *See Advanced Locales below*
          // ... other locales the app supports
        ],
        //home: HomeNew(),
        home: routes.buildPage('home', null),
        onGenerateRoute: (RouteSettings settings) {
          return MaterialPageRoute<Object>(builder: (BuildContext context) {
            return routes.buildPage(settings.name, settings.arguments);
          });
        });

Answer 1

使用有状态的小部件。切换调试模式横幅的示例：

class MyApp extends StatefulWidget {
  @override
  createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  
  bool showDebugBanner = false;
  
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: showDebugBanner,
      home: Scaffold(
        floatingActionButton: FloatingActionButton(
          child: Icon(Icons.remove_red_eye),
          onPressed: () => setState(() => showDebugBanner = !showDebugBanner),
        ),
      ),
    );
  }
}

是否可以在颤振中启用或禁用 showPerformanceOverlay 动态

1 个答案: