deflock-app/ios/Runner/AppDelegate.swift

import Flutter
import UIKit
import UserNotifications

@main
@objc class AppDelegate: FlutterAppDelegate, FlutterImplicitEngineDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    // Required by flutter_local_notifications: the plugin implements
    // userNotificationCenter(_:willPresent:withCompletionHandler:), which is
    // what allows a notification to appear while the app is in the foreground.
    // iOS only calls it on the registered delegate, and the plugin does not
    // register itself — without this line, foreground notifications are
    // silently suppressed by the system.
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as UNUserNotificationCenterDelegate
    }

    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }

  func didInitializeImplicitFlutterEngine(_ engineBridge: FlutterImplicitEngineBridge) {
    GeneratedPluginRegistrant.register(with: engineBridge.pluginRegistry)
  }
}