Swift在点击通知后显示警报

// 导入UIKit框架
import UIKit

// 在AppDelegate中处理通知点击事件
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // 注册通知
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { (granted, error) in
            // 处理授权结果
            if granted {
                print("通知授权成功")
            } else {
                print("通知授权失败")
            }
        }
        return true
    }

    // 处理点击通知事件
    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {
        // 创建警报控制器
        let alertController = UIAlertController(title: "通知", message: "您收到了一条新通知", preferredStyle: .alert)
        
        // 添加警报动作
        let okAction = UIAlertAction(title: "确定", style: .default, handler: nil)
        alertController.addAction(okAction)
        
        // 显示警报
        window?.rootViewController?.present(alertController, animated: true, completion: nil)
    }
}