Question

当应用程序在后台被用户杀死时，正在接收推送，当用户单击推送通知时，它会打开应用程序，并且不会崩溃，但会立即关闭。

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any],
                     fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
        // If you are receiving a notification message while your app is in the background,
        // this callback will not be fired till the user taps on the notification launching the application.

        // With swizzling disabled you must let Messaging know about the message, for Analytics
        Messaging.messaging().appDidReceiveMessage(userInfo)

        // Print message ID.
        print("The userInfo is: \(userInfo)")

        completionHandler(UIBackgroundFetchResult.newData)
    }

以前的方法甚至都没有调用，或者也许是，但是由于应用程序未运行，我不知道如何调试它。

这是我通过服务器发送的通知对象：

apns: {
                payload: {
                    aps: {
                        alert: {
                            title: messageObject.authorName,
                            body: messageObject.content,
                        },
                        sound: "notification.wav",
                        category: "ChatViewController"
                    }
                }
            }

这就是通过服务器发送的内容。当应用程序在后台但未被杀死时，或者在前景中时，通知才起作用。

Answer 1

我认为，当用户在您的应用程序被杀或处于后台或前台时单击通知时，将执行以下方法。您必须一步一步地对其进行测试。

首先，当您单击通知时，请检查您是否能够在应用程序运行后立即看到弹出窗口。只需复制此代码，并将其粘贴到您的 AppDelegate 类中，然后注释您的 didReceiveRemoteNotification 方法，然后检查应用程序是否崩溃。

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
    guard let object = response.notification.request.content.userInfo as? [String : AnyObject] else {
     return 
  }

    self.normalPopup()
 }

 /// Alert Popup, if user not exist in our database.
func normalPopup() {

    let alert = UIAlertController(title: "Test", message: "Show pop up window.", preferredStyle: .alert)
    alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
    }))
    self.window?.rootViewController?.present(alert, animated: true)
}

如果显示弹出窗口，请注释 normalPopup 函数，并用下面的代码替换该函数。然后检查应用程序被杀死时是否崩溃了。

    Messaging.messaging().appDidReceiveMessage(userInfo)

请让我知道您是否仍然面临同样的问题。

Answer 2

如果首先使用firebase，则应在application(_ application:, didFinishLaunchingWithOptions:)上对其进行定义，如下所示：

  
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        
        if #available(iOS 10.0, *) {
          // For iOS 10 display notification (sent via APNS)
          UNUserNotificationCenter.current().delegate = self

          let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
          UNUserNotificationCenter.current().requestAuthorization(
            options: authOptions,
            completionHandler: {_, _ in })
        } else {
          let settings: UIUserNotificationSettings =
          UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
          application.registerUserNotificationSettings(settings)
        }
        
        application.registerForRemoteNotifications()

        Messaging.messaging().delegate = self
        
        FirebaseApp.configure()
        return true
    }

使用此功能，您还可以在应用运行时处理通知：


func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
        
        if let messageID = userInfo["gcm.message_id"] {
          print("Message ID: \(messageID)")
        }
        // Print full message.
        print(userInfo)
       
        completionHandler(UIBackgroundFetchResult.newData)
    }

和

 func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
        
        if let messageID = userInfo["gcm.message_id"] {
          print("Message ID: \(messageID)")
        }

        // Print full message.
        print(userInfo)
        
    }

，您应该使用以下方法将新令牌设置为“消息传递”：

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {

        Messaging.messaging().apnsToken = deviceToken
        let token = deviceToken.map { String(format: "%02.2hhx", $0)}.joined()
        print(token)
        
    }

最后，您可以处理具有以下扩展名的通知


// [START ios_10_message_handling]
@available(iOS 10, *)
extension AppDelegate: UNUserNotificationCenterDelegate {

  // Receive displayed notifications for iOS 10 devices.
    func userNotificationCenter(_ center: UNUserNotificationCenter,
                                willPresent notification: UNNotification,
                                withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        let userInfo = notification.request.content.userInfo
        
        if let messageID = userInfo["gcm.message_id"] {
            print("Message ID: \(messageID)")
        }

    //*************************
    // Handle push notification message automatically when app is running 
    //*************************
    print(userInfo)

    // Change this to your preferred presentation option
    completionHandler([[.alert, .sound]])
  }

  func userNotificationCenter(_ center: UNUserNotificationCenter,
                              didReceive response: UNNotificationResponse,
                              withCompletionHandler completionHandler: @escaping () -> Void) {
    let userInfo = response.notification.request.content.userInfo
    // Print message ID.
    if let messageID = userInfo["gcm.message_id"] {
      print("Message ID: \(messageID)")
    }

    //*************************
    // Handle push notification message after click on it
    //*************************

    print(userInfo)

    completionHandler()
  }
}

推送通知背景被用户杀死

2 个答案: