如何在 Swift3 中的 UIViewController 中获取 FCM 消息

Question

我正在使用swift3。我想在我的应用收到FCM消息数据时向UIViewController中的tableview显示FCM消息。我已经在appDelegate中使用以下代码获得了我的 fcm 数据..但是我不知道如何在UIViewController中获取数据.

func userNotificationCenter(_ center: UNUserNotificationCenter,  willPresent notification: UNNotification, withCompletionHandler   completionHandler: @escaping (_ options:   UNNotificationPresentationOptions) -> Void) {
    let message : UNNotificationPresentationOptions = .alert
    //GlobalVariables.notification_message = getAlert(notification: .alert)

    if UIApplication.shared.applicationState == .active { // In iOS 10 if app is in foreground do nothing.
        print("active****")
        print("(notification.request.content.userInfo)")
        completionHandler([message, .sound])
    } else {
        print("Not active****")
        completionHandler([message, .badge, .sound])
    }
}

请帮助我提前感谢

Answer 1

在 AppDelegate 上设置一个变量，然后从以下任一位置使用它：

• AppDelegate's didFinishLaunchingWithOptions on window?.rootViewController
• 通过调用(UIApplication.shared.delegate as? AppDelegate)?.yourVariable的视图控制器

我建议在使用 AppDelegate 后将变量设置为 nil，以防止两次使用相同的通知数据。

Answer 2

在应用程序委托中像这样更改代码

    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
   // FIRInstanceID.instanceID().setAPNSToken(deviceToken, type: FIRInstanceIDAPNSTokenType.sandbox)
   // FIRInstanceID.instanceID().setAPNSToken(deviceToken, type: FIRInstanceIDAPNSTokenType.prod)
}
func applicationWillTerminate(_ application: UIApplication) {
    UserDefaults.standard.removeObject(forKey: "check")
    UserDefaults.standard.removeObject(forKey: "userid")
    UserDefaults.standard.removeObject(forKey: "patient_no")
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any],fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
    let state: UIApplicationState = UIApplication.shared.applicationState
    if state == .active{
        UIApplication.shared.applicationIconBadgeNumber = 0
        if let notification = userInfo["aps"] as? [AnyHashable: Any],
            let alert = notification["alert"] as? String {
            print(alert)
            message = alert
            let localNotification = UILocalNotification()
            localNotification.alertBody = alert
            localNotification.soundName = UILocalNotificationDefaultSoundName
            UIApplication.shared.scheduleLocalNotification(localNotification)
            print("Active----")
        }
    }else if state == .inactive{
        if let notification = userInfo["aps"] as? [AnyHashable: Any],let alert = notification["alert"] as? String {
            print(alert)
            message = alert
            let localNotification = UILocalNotification()
            localNotification.alertBody = alert
            localNotification.soundName = UILocalNotificationDefaultSoundName
            UIApplication.shared.scheduleLocalNotification(localNotification)
            print("Inactive----")
        }
    }else if state == .background{
        if let notification = userInfo["aps"] as? [AnyHashable: Any],let alert = notification["alert"] as? String,let sound = notification["sound"] as? String{
            print(alert)
            message = alert
            var localNotification = UILocalNotification()
            localNotification.alertBody = alert
            localNotification.soundName = sound
            UIApplication.shared.applicationIconBadgeNumber = number!+1
            print(number!+1)
            UIApplication.shared.scheduleLocalNotification(localNotification)
            print("Background----")
        }
    }
}

然后将其添加到您想要返回消息的位置

    let delegate = UIApplication.shared.delegate as! AppDelegate
    let message = delegate.message

• 这是一个示例，只有您要添加一些条件