我无法向我的应用程序发送 Firebase Cloud Messaging 推送通知我按照步骤操作但无处可去

Question

我按照这些步骤创建了一个 APN 密钥并上传了它，但是每当我尝试通过 firebase 的云消息传递部分发送消息时它似乎无法识别我的应用程序它说（0％的潜在用户有资格参加此活动: 0)。 这是我的整个应用程序委托文件。我的应用程序可以访问数据库并检索数据，这只是云消息传递部分。

      import UIKit
      import Firebase
      import CoreLocation
      import FirebaseMessaging
      import UserNotifications



      @UIApplicationMain
      class AppDelegate: UIResponder,UIApplicationDelegate, 
 UINavigationControllerDelegate, UIImagePickerControllerDelegate{

var window: UIWindow?
let gcmMessageIDKey = "gsm.message_id"

let userNotificationCenter = UNUserNotificationCenter.current()
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.

    FirebaseApp.configure()
   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)
          }

          Messaging.messaging().delegate = self
          application.registerForRemoteNotifications()


    return true


}



func applicationWillResignActive(_ application: UIApplication) {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.


}

func applicationDidEnterBackground(_ application: UIApplication) {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.

}

func applicationWillEnterForeground(_ application: UIApplication) {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}

func applicationDidBecomeActive(_ application: UIApplication) {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

func applicationWillTerminate(_ application: UIApplication) {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
  // 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)")
  }

  // Print full message.
  print(userInfo)
}

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.
  // 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)")
  }

  // Print full message.
  print(userInfo)

  completionHandler(UIBackgroundFetchResult.newData)
}


}

@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

// 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)")
}

// Print full message.
print(userInfo)

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

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[gcmMessageIDKey] {
  print("Message ID: \(messageID)")
}

// Print full message.
print(userInfo)

completionHandler()
}
}




extension AppDelegate: MessagingDelegate{
func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
  print("Firebase registration token: \(fcmToken)")

  let dataDict:[String: String] = ["token": fcmToken]
  NotificationCenter.default.post(name: Notification.Name("FCMToken"), object: nil, userInfo: dataDict)
  // TODO: If necessary send token to application server.
  // Note: This callback is fired at each app startup and whenever a new token is generated.
}

func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
    print(remoteMessage.appData)
}
}

Answer 1

• 我有同样的问题（Xcode-11.3.1）

• 我使用示例代码很长时间。 没有问题。 我可以在日志中看到令牌。 照常。

• 我昨天又用了。 我发送了一个通知，我看到它成功了，但我无法通过设备接收它。

• 我添加了能力 -> 推送通知和能力 -> 后台模式 -> 远程通知（检查）
• 我创建了 APN 密钥和所有证书，但这并不重要。

• 然后我更新了 Xcode(11.4.1)。 它现在正在工作。 我写信说明问题不是代码或证书。

   func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) { print("APNs token retrieved: \\(deviceToken)") }

这个功能很重要。 如果您可以看到此输出，则可以成功接收通知：

检索到的 APNs 令牌：32 字节