未收到从 FCM 到 iOS Swift 3 的推送通知

Question

我正在构建一个带有FCM推送通知的iOS应用程序。我遵循了Google Firebase文档和其他教程，但我的AppDelegate从未执行函数didReceiveRemoteNotification，因此当我从Firebase控制台发送通知时，它什么也不做。

我现在有这个：

应用委托.swift

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        application.registerForRemoteNotifications()            
        FIRApp.configure()
        connectToFcm()
        return true
    }
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    token = deviceToken.map { String(format: "%02.2hhx", $0) }.joined()
    print("<-TOKEN->")
    print(token)
}
func connectToFcm() {
    FIRMessaging.messaging().connect { (error) in
        if (error != nil) {
            print("Unable to connect with FCM. (error)")
        } else {
            print("Connected to FCM.")
        }
    }
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
    // Print message ID.
    print("Message ID: (userInfo["gcm.message_id"]!)")
    // Print full message.
    print("%@", userInfo)
}

• 我还在我的CocoaPods文件中安装了Firebase。
• 我在 Firebase 控制台中使用相同的内部版本 ID 注册了该应用。
• 我有"必需的后台模式 ->应用程序下载内容作为响应在我的 info.plist 文件中推送通知">
• 我已创建 APNS 证书并将其上传到 Firebase 控制台中的设置中。

当我启动应用程序时，它会成功构建，并在控制台上打印我的这个：

[Firebase/Analytics][I-ACS023012] Firebase Analytics enabled
2017-05-29 12:10:56.101 incidenciasSifu[1811] <Notice> [Firebase/Analytics][I-ACS023012] Firebase Analytics enabled
Optional(Error Domain=com.google.fcm Code=2001 "FIRMessaging is already connected" UserInfo={NSLocalizedFailureReason=FIRMessaging is already connected})
<-TOKEN->
Optional("03545fbbb986e2ffdfa50ac9e3eb6fe07e6fe4694cdfd000d673a0bf5ea53f6a")
Connected to FCM.

我是 Swift 的新手，我不知道我是否忘记在 AppDelegate 中添加一些代码或其他东西。

请帮忙！我花了太多时间在这个:(

Answer 1

在注册推送通知之前，您需要要求用户授予您必要的权限。在didFinishLaunchingWithOptions方法中尝试以下代码：

if #available(iOS 10.0, *) {
    UNUserNotificationCenter.current().requestAuthorization(options: [.badge, .alert, .sound]) { (granted, error) in
        if granted {
            application.registerForRemoteNotifications()
        }
    }
} else {
    let notificationTypes: UIUserNotificationType = [.alert, .badge, .sound]
    let settings = UIUserNotificationSettings(types: notificationTypes, categories: nil)
    application.registerUserNotificationSettings(settings)
    application.registerForRemoteNotifications()
}

检查应用程序启动的原因也很有用。在此方法中添加以下代码：

if let remoteNotification = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] {
    self.application(application, didReceiveRemoteNotification: remoteNotification as! [AnyHashable : Any])
}

此外，您可以添加 didFailToRegisterForRemoteNotificationsWithError 方法，以了解可能错误的原因：

func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
    print ("Eror: (error.localizedDescription)")
}

Answer 2

您需要

在应用程序委托的didFinishLaunchingWithOptions中注册通知。

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        let center = UNUserNotificationCenter.current()
        center.requestAuthorization(options:[.badge, .alert, .sound]) { (granted, error) in
            //  actions based on whether notifications were authorized or not
        }
        application.registerForRemoteNotifications()
        return true
    }