samples/add_to_app/ios_fullscreen/IOSFullScreen/AppDelegate.swift

// Copyright 2019 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import UIKit
import Flutter

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?

    var flutterEngine : FlutterEngine?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Instantiate Flutter engine
        self.flutterEngine = FlutterEngine(name: "io.flutter", project: nil)
        self.flutterEngine?.run(withEntrypoint: nil)

        return true
    }
}