尝试将以下代码添加到ios/Runner/AppDelegate.swift文件中：

import UIKit
import Flutter
import Firebase
import GoogleMaps

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    FirebaseApp.configure()
    GeneratedPluginRegistrant.register(with: self)
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
    }
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }

  override func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
      let firebaseAuth = Auth.auth()
      firebaseAuth.setAPNSToken(deviceToken, type: AuthAPNSTokenType.unknown)

  }
  override func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
      let firebaseAuth = Auth.auth()
      if (firebaseAuth.canHandleNotification(userInfo)){
          print(userInfo)
          return
      }
  }

}