如何在Swift AppDelegate之外获取Firebase FCM令牌

import Firebase
import FirebaseMessaging

FirebaseApp.configure()

class YourViewController: UIViewController, FirebaseMessagingDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        FirebaseMessaging.messaging().delegate = self
    }
    
    // 实现FirebaseMessagingDelegate协议中的方法
    func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
        // 在这里获取到FCM令牌
        print("FCM令牌：\(fcmToken)")
    }
}

import Firebase
import FirebaseMessaging

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, MessagingDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        FirebaseApp.configure()
        
        // 设置UNUserNotificationCenter的代理
        UNUserNotificationCenter.current().delegate = self
        
        // 请求用户授权显示通知
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { (granted, error) in
            if granted {
                DispatchQueue.main.async {
                    application.registerForRemoteNotifications()
                }
            }
        }
        
        // 注册FCM令牌
        Messaging.messaging().delegate = self
        Messaging.messaging().isAutoInitEnabled = true
        
        return true
    }
    
    // 处理FCM令牌
    func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
        // 在这里获取到FCM令牌
        print("FCM令牌：\(fcmToken)")
    }
    
    // 其他AppDelegate的方法...
}