如何在UserDefault中存储推送通知警报消息？

Question

我想构建一个应用程序,我可以接收推送通知并保存在客户端设备内以获得限制25通知.如果应用程序正在运行,可能无法运 如何存储PushNotification警报消息？如果运行该时间的应用程序到达存储在UserDefault中的通知警报消息,但是当应用程序处于后台或处于非活动状态时,该时间未在UserDefault中存储通知警报消息.我想知道我需要使用UserDefault或CoreData在客户端应用程序中存储推送通知消息吗？如果不是,我该怎么用？我真的需要一只手来接我.

请帮忙.谢谢.

Answer 1

步骤1：

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
     {
         requestUserPermissions(application: application)
         if let notification = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] as? [String: AnyObject]
            {
                let info : NSDictionary! = notification as NSDictionary
                if info != nil
                {
                    getDataFromNotification(userInfo: info as! [AnyHashable : Any])
                    Alert.showAlert((self.window?.rootViewController)!, message: "App is terminated", strtitle: "Notification")
                }
            }
            return true
    }

第2步：

func requestUserPermissions(application: UIApplication)
    {
        if #available(iOS 10.0, *)
        {
            let center = UNUserNotificationCenter.current()
            center.delegate = self
            center.requestAuthorization(options:[.badge, .alert, .sound])
            {
                (granted, error) in

                if( !(error != nil) )
                {
                    application.registerForRemoteNotifications()
                }
                // Enable or disable features based on authorization.
            }

        }
        else {
            // Fallback on earlier versions
            if (!application.isRegisteredForRemoteNotifications)
            {
                application.applicationIconBadgeNumber = 0
                application.registerForRemoteNotifications()
            }
        }

步骤 3：

@objc(userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler:) @available(iOS 10.0, *)
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void)
 {

       print("Userinfo1 \(response.notification.request.content.userInfo)")
        getDataFromNotification(userInfo: response.notification.request.content.userInfo)
        Alert.showAlert((self.window?.rootViewController)!, message: "I am in Background", strtitle: "Notification")
    }
      @objc(userNotificationCenter:willPresentNotification:withCompletionHandler:) @available(iOS 10.0, *)
        func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
        {
           print("Userinfo2 \(notification.request.content.userInfo)")
            getDataFromNotification(userInfo: notification.request.content.userInfo)
            Alert.showAlert((self.window?.rootViewController)!, message: "I am in forground", strtitle: "Notification")
        }

步骤4：

func getDataFromNotification(userInfo: [AnyHashable : Any])
    {
        let info : NSDictionary! = userInfo as NSDictionary

        if info != nil
        {
            if let aps = info["aps"] as? NSDictionary
            {
               if let resultsDict =  aps as? [String:AnyObject]
             {
                for _ in resultsDict
               {
                let str = dictCleanData.value(forKey: "alert")!
                let time = dictCleanData.value(forKey: "day")!

                let dict = ["msg" : str, "time": time]

                UserDefaults.standard.set(dict, forKey: "dict")
                UserDefaults.standard.synchronize()

                  }
             }
           }
     }
}

第 5 步：检查其他视图控制器上保存的数据

 override func viewDidLoad()
 {
        super.viewDidLoad()

           if UserDefaults.standard.value(forKey: "dict") != nil
          {
             let dict : NSDictionary = UserDefaults.standard.value(forKey: "dict") as! NSDictionary

               arr_Veges.add(dict)

               if  UserDefaults.standard.value(forKey: "arr_Veges") != nil
               {
                  let arr = UserDefaults.standard.value(forKey: "arr_Veges") as! NSArray

                  for oldObj in arr
                  {
                    arr_Veges.add(oldObj)
                  }
               }

               UserDefaults.standard.set(arr_Veges, forKey: "arr_Veges")
               UserDefaults.standard.synchronize()
        }
}