带有 FCM 令牌的 Firebase 通知显示已发送但未收到

我正在尝试使用 FCM 令牌从 firebase 通知控制台向特定设备发送简单的推送通知。 firebase 通知控制台显示已发送的通知，但设备未收到该通知。我尝试发送通知，然后等待查看控制台是否从didReceiveRemoteNotification，但是通知需要很长时间（几小时）才能在 firebase 控制台中显示为发送（即使我将优先级设置为high).

应用程序委托

import UIKit
import Firebase
import FirebaseStorage
import FirebaseDatabase
import FirebaseMessaging
import CoreData
import UserNotifications

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.

        // Use Firebase library to configure APIs
        FirebaseApp.configure()

        /////
        // For Firebase Cloud Messaging (FCM)
        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()
        // End of [for Firebase Cloud Messaging (FCM)]
        /////

        return true
    }

    ///////////////////////
    // FCM Setup

    // Monitor token generation for FCM: Be notified whenever the FCM token is updated
    func messaging(_ messaging: Messaging, didRefreshRegistrationToken fcmToken: String) {
        print("Firebase registration token: \(fcmToken)")
    }

    // Monitor token generation for FCM:
    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        Messaging.messaging().apnsToken = deviceToken
    }    // Handle messages received through the FCM APNs interface
    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
        print("didReceiveRemoteNotification")
        // 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.
        // TODO: Handle data of notification

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

        // Print message ID.
        // gcm_message_id
        if let messageID = userInfo["gcmMessageIDKey"] {
            print("Message ID: \(messageID)")
        }

^我的猜测是，问题可能与“gcm_message_id”/“gcmMessageId”/“gcm.message_id”有关，因为我在下面尝试的三种方法中的每一种都不同

        // Print full message.
        print(userInfo)
    }

    // Handle messages received through the FCM APNs interface
    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
        print("didReceiveRemoteNotification (withCompletionHandeler)")
        // 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.
        // TODO: Handle data of notification

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

        // Print message ID.
        if let messageID = userInfo["gcmMessageIDKey"] {
            print("Message ID: \(messageID)")
        }

^我的猜测是，问题可能与“gcm_message_id”/“gcmMessageId”/“gcm.message_id”有关，因为我在下面尝试的三种方法中的每一种都不同

        // Print full message.
        print(userInfo)

        completionHandler(UIBackgroundFetchResult.newData)
    }

    // End of [FCM Setup]
    ///////////////////////
}

视图控制器

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Retrieve the current registration token for Firebase Cloud Messaging (FCM)
        let token = Messaging.messaging().fcmToken
        print("FCM token: \(token ?? "")")
      }
}

权利和启用推送通知

I have added the push entitlements and enabled background modes for push notifications and added the GoogleService-Info.plist to my project.

发送通知的方法

I am creating notification from the Firebase Notifications console (as shown below) so there should be no issue with the structure of the notification itself.

我尝试了以下方法来解决该问题，但都产生了相同的结果：

• Google Firebase 文档
• 带 firebase 的远程通知教程
• Google Firebase 快速入门

有谁知道为什么通知在 firebase 通知控制台中被标记为已发送但没有显示在设备上？

我在处理推送通知时使用的几个故障排除步骤是：

1. 首先让推送独立于 Firebase 服务工作。我用这个tool.
2. 确保您没有任何包标识符命名空间冲突。例如，在设备上应用程序商店构建、testflight 构建和/或开发构建的任意组合。删除应用程序的所有实例（仅保留一个实例）。捆绑包标识符是您的设备如何知道将推送通知路由到哪个应用程序的方式。
3. 当所有其他方法都失败时 - 我尝试通过构建一个新的示例项目并将其连接到一个新的 firebase 项目来隔离问题，看看我是否可以将焦点缩小到能够在没有任何其他业务逻辑的情况下进行推送工作应用程序。这帮助我向自己证明我没有发疯，并向我证明这不是某种神秘的网络状况导致了我的困境。

我希望这可以帮助您在工作时弄清楚这一切。