medium_04_dismiss_kb_ios.dart

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      builder: (context, child) => Scaffold(
        // Global GestureDetector that will dismiss the keyboard
        body: GestureDetector(
          onTap: () {
            // When running in iOS, dismiss the keyboard when any Tap happens outside a TextField
            if (Platform.isIOS) hideKeyboard(context);
          },
          child: child,
        ),
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }

  void hideKeyboard(BuildContext context) {
    FocusScopeNode currentFocus = FocusScope.of(context);
    if (!currentFocus.hasPrimaryFocus && currentFocus.focusedChild != null) {
      FocusManager.instance.primaryFocus.unfocus();
    }
  }
}