PushNotification 横幅未在 ios 10.3 中显示

Posted 2023-02-24

【中文标题】PushNotification 横幅未在 ios 10.3 中显示

【英文标题】：PushNotification banner not showing in ios 10.3

【发布时间】：2017-11-14 06:06:39

【问题描述】：

我已将推送通知集成到我的项目中，出于某种原因，横幅会在我处于后台状态时出现，而不是在我处于前台时出现。我确定我错过了一些东西，我的代码如下。任何帮助将不胜感激。

import UserNotifications
class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate 

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool 
        let center  = UNUserNotificationCenter.current()
        center.delegate = self //not sure this is appropriate 
        registerForPushNotifications()

func registerForPushNotifications() 
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) 
            (granted, error) in

            guard granted else  return 
            self.getNotificationSettings()
        
    
    func getNotificationSettings() 
        UNUserNotificationCenter.current().getNotificationSettings  (settings) in
            print("Notification settings: \(settings)")
            guard settings.authorizationStatus == .authorized else  return 
            DispatchQueue.main.async(execute: 
            UIApplication.shared.registerForRemoteNotifications()
            )
        
    
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) 

        let tokenParts = deviceToken.map  data -> String in
            return String(format: "%02.2hhx", data)
        

        let token = tokenParts.joined()
        if let valueInDB = UserDefaults.standard.value(forKey: "Permission_Granted") 

        UserDefaults.standard.setValue(token, forKey: "PUSH_TOKEN")
        UserDefaults.standard.synchronize()
        print("Device Push Token: \(token)")


    

每次我收到通知时都会调用它，不管它是在前台还是后台运行。因此批处理图标得到更新。

func application(_ application: UIApplication,
                         didReceiveRemoteNotification userInfo: [AnyHashable : Any],
                         fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void)
        

            print("Recived: \(userInfo)")

            completionHandler(.newData)

            self.onPushRecieved = MP3ViewController().catchPushNotifications
            let notification = JSON(userInfo)
            print(notification)

            let mediaId = (notification["media_id"]).stringValue
            print(mediaId)
            var badgeCount = 0
            var pushAvailable = false


            if let pushCount = UserDefaults.standard.value(forKey: "PUSH_COUNT")
                badgeCount = pushCount as! Int
                print(badgeCount)
                badgeCount = badgeCount + 1
                UIApplication.shared.applicationIconBadgeNumber = badgeCount
            

            print(badgeCount)
            UserDefaults.standard.setValue(badgeCount, forKey: "PUSH_COUNT")
            UserDefaults.standard.synchronize()

            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            print(isOnBackGround)
            if isOnBackGround 
                if mediaId != nil
                    DispatchQueue.main.async 
                        let mP3ViewController = storyboard.instantiateViewController(withIdentifier:"MP3ViewController") as! MP3ViewController
                        mP3ViewController.media_ID = mediaId
                        self.navigationController?.pushViewController(mP3ViewController, animated:true)
                        self.isOnBackGround = false

                    

                
            else
                print("Running on foreground")

            

        
    

【问题讨论】：

UNUserNotificationCenterDelegate 协议定义了接收通知和处理动作的方法。那么处理自定义横幅的方法是什么

@danu UNUserNotificationCenterDelegate 的 delegate 方法在哪里？

【参考方案1】：

您可能希望实现以下功能，例如：

public func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Swift.Void) 
    completionHandler([.badge, .alert, .sound])

此代表的：UNUserNotificationCenterDelegate