如何在一个信号中处理可点击推送通知iOS Swift

import UIKit
import UserNotifications

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // 请求推送通知权限
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { (granted, error) in
            if granted {
                // 用户同意授权
                DispatchQueue.main.async {
                    application.registerForRemoteNotifications()
                }
            } else {
                // 用户拒绝授权
            }
        }
        
        // 设置UNUserNotificationCenter的代理
        UNUserNotificationCenter.current().delegate = self
        
        return true
    }
    
    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        // 注册远程通知成功，获取设备的推送令牌
        let token = deviceToken.map { String(format: "%02.2hhx", $0) }.joined()
        print("Device Token: \(token)")
    }
    
    func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
        // 注册远程通知失败
        print("Failed to register for remote notifications: \(error.localizedDescription)")
    }
    
    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
        // 处理接收到的推送通知
        print("Received remote notification: \(userInfo)")
        
        // 处理可点击推送通知
        if application.applicationState == .inactive || application.applicationState == .background {
            // 应用程序处于后台或未激活状态，用户点击了推送通知
            // 在这里执行相应的操作
        }
        
        completionHandler(.newData)
    }
}