Solian/ios/Runner/AppDelegate.swift

import UIKit
import Flutter

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
    override func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
        GeneratedPluginRegistrant.register(with: self)
        return super.application(application, didFinishLaunchingWithOptions: launchOptions)
    }
    
    override func applicationDidBecomeActive(_ application: UIApplication) {
        application.applicationIconBadgeNumber = 0;
        UNUserNotificationCenter.current().removeAllDeliveredNotifications();
    }
}