Converting a website into an iOS application using Android Studio is not a common approach, as Android Studio is primarily for Android development. However, you can use Flutter within Android Studio to create a cross-platform mobile app (iOS & Android). Below is a step-by-step guide to achieving this, including essential features like splash screens, progress bars, offline support, push notifications, and publishing.

To develop an iOS app from a website, we will use Flutter (a cross-platform framework) in Android Studio.

1. Install Required Tools

• Android Studio (with Flutter plugin)
• Xcode (for iOS development)
• Flutter SDK (https://flutter.dev)
• CocoaPods (for iOS dependencies, install via sudo gem install cocoapods)

2. Create a Flutter Project

1. Open Android Studio → Click on "Start a new Flutter project".
2. Select Flutter Application → Set a project name and location.
3. Choose a development language (Dart is the default).
4. Click Finish.

3. Add a WebView to Load Your Website

To display your website inside the app, use webview_flutter:

Install WebView Plugin

In pubspec.yaml, add:

dependencies:
  flutter:
    sdk: flutter
  webview_flutter: ^4.2.2

Run:

flutter pub get

Modify main.dart to Use WebView

import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: WebScreen(),
    );
  }
}

class WebScreen extends StatefulWidget {
  @override
  _WebScreenState createState() => _WebScreenState();
}

class _WebScreenState extends State<WebScreen> {
  late WebViewController controller;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: WebView(
        initialUrl: "https://yourwebsite.com",
        javascriptMode: JavascriptMode.unrestricted,
        onWebViewCreated: (WebViewController webViewController) {
          controller = webViewController;
        },
      ),
    );
  }
}

4. Add a Splash Screen

To create a splash screen, use the flutter_native_splash package.

Install the Package

In pubspec.yaml, add:

dev_dependencies:
  flutter_native_splash: ^2.3.2

Run:

flutter pub get

Configure Splash Screen

Edit flutter_native_splash.yaml:

flutter_native_splash:
  color: "#ffffff"
  image: assets/splash.png
  android: true
  ios: true

Run:

flutter pub run flutter_native_splash:create

5. Add a Progress Bar (Loading Indicator)

Modify WebScreen to show a progress bar while loading:

class _WebScreenState extends State<WebScreen> {
  late WebViewController controller;
  bool isLoading = true;

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        WebView(
          initialUrl: "https://yourwebsite.com",
          javascriptMode: JavascriptMode.unrestricted,
          onWebViewCreated: (controller) {
            this.controller = controller;
          },
          onPageFinished: (_) {
            setState(() {
              isLoading = false;
            });
          },
        ),
        if (isLoading)
          Center(child: CircularProgressIndicator()), // Show loader
      ],
    );
  }
}

6. Add Offline Support

To show a message when offline, use connectivity_plus:

Install Package

In pubspec.yaml, add:

dependencies:
  connectivity_plus: ^5.0.2

Run:

flutter pub get

Modify WebScreen to Check Connectivity

import 'package:connectivity_plus/connectivity_plus.dart';

@override
void initState() {
  super.initState();
  Connectivity().onConnectivityChanged.listen((ConnectivityResult result) {
    if (result == ConnectivityResult.none) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('No Internet Connection')),
      );
    }
  });
}

7. Implement Push Notifications

Use Firebase Cloud Messaging (FCM) for push notifications.

Steps:

1. Set up Firebase:

   • Go to Firebase Console
   • Create a project and add iOS
   • Download the GoogleService-Info.plist and add it to your project.

2. Install Firebase Messaging Package

   dependencies:
     firebase_messaging: ^14.6.2
     firebase_core: ^2.14.0
   

3. Initialize Firebase in main.dart

   import 'package:firebase_core/firebase_core.dart';
   import 'package:firebase_messaging/firebase_messaging.dart';
   
   void main() async {
     WidgetsFlutterBinding.ensureInitialized();
     await Firebase.initializeApp();
     FirebaseMessaging messaging = FirebaseMessaging.instance;
     String? token = await messaging.getToken();
     print("FCM Token: $token");
     runApp(MyApp());
   }
   

8. Publish to the App Store

Prerequisites

• Apple Developer Account ($99/year)
• A Mac computer with Xcode
• An app icon (1024x1024 PNG)

Steps to Publish

1. Prepare the App

   flutter build ios
   

2. Open in Xcode

   open ios/Runner.xcworkspace
   

3. Set Bundle ID & Team

   • Go to Signing & Capabilities
   • Choose a unique Bundle Identifier
   • Select Development Team

4. Archive and Upload

   • In Xcode, go to Product → Archive
   • Click Distribute App → App Store Connect
   • Submit for review.

Conclusion

You’ve successfully converted a website into an iOS app using Flutter in Android Studio. It includes: ✅ WebView
✅ Splash Screen
✅ Progress Bar
✅ Offline Support
✅ Push Notifications
✅ Publishing to App Store