如何让 Firebase 推送通知正常工作

Question

我花了大约 2 天的时间浏览 Firebase 文档、提出问题并查看其他人并关注 youtube/medium 教程等等。这是一个带有我的完整应用程序委托的 github 项目，因此我的所有代码都是可见的。

但是我还没有弄清楚如何能够从Firebase云消息传递发送通知消息。我已经设置了Apple推送服务，已将身份验证密钥输入Firebase，并在我的应用程序委托中编写了代码 在这里看到

有人可以让我知道我需要做什么才能让它工作吗？我错过了什么？

这是我didRegisterForRemoteNotificationsWithDeviceToken方法：

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
Messaging.messaging().apnsToken = deviceToken
let tokenParts = deviceToken.map { data in String(format: "%02.2hhx", data) }
let token = tokenParts.joined()
print("Device Token: (token)")
}

更新：

我再次遵循了Firebase的整个文档，但仍然从Fire云消息发送通知不起作用。

显然，鉴于我有 2 行将令牌保存到 firebase 成功保存令牌，代码正在运行。

Answer 1

我过去遇到过这样的问题，为我修复它的方法是检查身份验证密钥和 fire 项目以及 Xcode 中的bundle ID是否相同。

此外，为了确保您的应用委托代码正确无误，只需使用 Firebase 的示例：

import UIKit
import UserNotifications
import Firebase
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
let gcmMessageIDKey = "gcm.message_id"
func application(_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
FirebaseApp.configure()
// [START set_messaging_delegate]
Messaging.messaging().delegate = self
// [END set_messaging_delegate]
// Register for remote notifications. This shows a permission dialog on first run, to
// show the dialog at a more appropriate time move this registration accordingly.
// [START register_for_notifications]
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 register_for_notifications]
return true
}
// [START receive_message]
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)
}
// [END receive_message]
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
print("Unable to register for remote notifications: (error.localizedDescription)")
}
// This function is added here only for debugging purposes, and can be removed if swizzling is enabled.
// If swizzling is disabled then this function must be implemented so that the APNs token can be paired to
// the FCM registration token.
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
print("APNs token retrieved: (deviceToken)")
// With swizzling disabled you must set the APNs token here.
// Messaging.messaging().apnsToken = deviceToken
}
}
// [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
// 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([])
}
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()
}
}
// [END ios_10_message_handling]

extension AppDelegate : MessagingDelegate {
// [START refresh_token]
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.
}
// [END refresh_token]
// [START ios_10_data_message]
// Receive data messages on iOS 10+ directly from FCM (bypassing APNs) when the app is in the foreground.
// To enable direct data messages, you can set Messaging.messaging().shouldEstablishDirectChannel to true.
func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
print("Received data message: (remoteMessage.appData)")
}
// [END ios_10_data_message]
}

Answer 2

假设您在 Firebase 控制台中正确配置了 APNS 身份验证密钥，并考虑到您提供的 appDelegate 实现，我看到唯一缺少的代码段是FIRInstanceId创建。

根据Firebase文档，这里：

实例 ID 为每个应用实例提供唯一标识符和机制>用于对操作进行身份验证和授权(例如，发送 FCM 消息)。

生成实例 ID 后，该库会定期向 Firebase>后端发送有关应用及其运行设备的信息>。

而这里

若要发送或接收消息，应用必须从>FIRInstanceID 获取注册令牌。此令牌授权应用程序服务器向应用程序>实例发送消息。

在应用程序中注册远程通知的位置之前didFinishLaunching...，在应用程序之前添加此项。registerForRemoteNotifications()

InstanceID.instanceID().instanceID { (result, error) in
if let error = error {
print("Error fetching remote instange ID: (error)")
} else if let result = result {
print("Remote instance ID token: (result.token)")
}
}

让我知道这是否有帮助:)