flutter_embed_unity_2022_3_ios 0.0.5-beta

iOS implementation for Unity 2022.3 LTS of the flutter_embed_unity plugin.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_embed_unity/flutter_embed_unity.dart';
import 'package:intl/intl.dart';

void main() {
  runApp(const ExampleApp());
}

class ExampleApp extends StatefulWidget {
  const ExampleApp({super.key});

  @override
  State<ExampleApp> createState() => _ExampleAppState();
}

class _ExampleAppState extends State<ExampleApp> {

  // When converting between strings and numbers in a message protocol
  // always use a fixed locale, to prevent unexpected parsing errors when
  // the user's locale is different to the locale used by the developer
  // (eg the decimal separator might be different)
  static final _fixedLocaleNumberFormatter = NumberFormat.decimalPatternDigits(
    locale: 'en_gb',
    decimalDigits: 2,
  );

  bool? _isUnityArSupportedOnDevice;
  bool _isArSceneActive = false;
  double _rotationSpeed = 30;
  int _numberOfTaps = 0;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Builder(
          builder: (context) {
            final theme = Theme.of(context);
            final bool? isUnityArSupportedOnDevice = _isUnityArSupportedOnDevice;
            final String arStatusMessage;

            if(isUnityArSupportedOnDevice == null) {
              arStatusMessage = "checking...";
            }
            else if(isUnityArSupportedOnDevice) {
              arStatusMessage = "supported";
            }
            else {
              arStatusMessage = "not supported on this device";
            }

            return Column(
              children: [
                Expanded(
                  child: EmbedUnity(
                    onMessageFromUnity: (String data) {
                      // A message has been received from a Unity script
                      if(data == "touch"){
                        setState(() {
                          _numberOfTaps = _numberOfTaps++;
                        });
                      }
                      else if(data == "scene_loaded") {
                        _sendRotationSpeedToUnity(_rotationSpeed);
                      }
                      else if(data == "ar:true") {
                        setState(() {
                          _isUnityArSupportedOnDevice = true;
                        });
                      }
                      else if(data == "ar:false") {
                        setState(() {
                          _isUnityArSupportedOnDevice = false;
                        });
                      }
                    },
                  ),
                ),
                Padding(
                  padding: const EdgeInsets.all(16),
                  child: Text(
                    "Flutter logo has been touched $_numberOfTaps times",
                    textAlign: TextAlign.center,
                    style: theme.textTheme.titleMedium,
                  ),
                ),
                Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 16),
                  child: Row(
                    children: [
                      Text("Activate AR ($arStatusMessage)"),
                      Switch(
                        value: _isArSceneActive,
                        onChanged: isUnityArSupportedOnDevice != null && isUnityArSupportedOnDevice ? (value) {
                          sendToUnity(
                            "SceneSwitcher",
                            "SwitchToScene",
                            _isArSceneActive ? "FlutterEmbedExampleScene" : "FlutterEmbedExampleSceneAR",
                          );
                          setState(() {
                            _isArSceneActive = value;
                          });
                        } : null,
                      ),
                    ],
                  ),
                ),
                Row(
                  children: [
                    const Padding(
                      padding: EdgeInsets.only(left: 16),
                      child: Text(
                        "Speed",
                      ),
                    ),
                    Expanded(
                      child: Slider(
                        min: -200,
                        max: 200,
                        value: _rotationSpeed,
                        onChanged: (value) {
                          setState(() {
                            _rotationSpeed = value;
                          });
                          _sendRotationSpeedToUnity(value);
                        },
                      ),
                    ),
                  ],
                ),
                Row(
                  children: [
                    Expanded(
                      child: Padding(
                        padding: const EdgeInsets.all(8.0),
                        child: ElevatedButton(
                          onPressed: () {
                            pauseUnity();
                          },
                          child: const Text("Pause"),
                        ),
                      ),
                    ),
                    Expanded(
                      child: Padding(
                        padding: const EdgeInsets.all(8.0),
                        child: ElevatedButton(
                          onPressed: () {
                            resumeUnity();
                          },
                          child: const Text("Resume"),
                        ),
                      ),
                    ),
                    Expanded(
                      child: Padding(
                        padding: const EdgeInsets.all(8.0),
                        child: ElevatedButton(
                          onPressed: () {
                            showDialog(context: context, builder: (context) =>
                            const AlertDialog(
                              content: Column(
                                mainAxisSize: MainAxisSize.min,
                                children: [
                                  SizedBox(
                                    height: 100,
                                    width: 80,
                                    child: EmbedUnity(),
                                  ),
                                  Text(
                                    "Unity can only be shown in 1 widget at a time. If a new route "
                                        "with a FlutterEmbed is pushed onto the stack, the one underneath is "
                                        "'detached' from Unity, and restored when the route is popped",
                                    textAlign: TextAlign.center,
                                  ),
                                ],
                              ),
                            )
                            );
                          },
                          child: const Text("Open dialog", textAlign: TextAlign.center),
                        ),
                      ),
                    ),
                  ],
                )
              ],
            );
          },
        ),
      ),
    );
  }

  void _sendRotationSpeedToUnity(double rotationSpeed) {
    sendToUnity(
      "FlutterLogo",
      "SetRotationSpeed",
      _fixedLocaleNumberFormatter.format(rotationSpeed),
    );
  }
}