如何在不点击横幅或显示通知之前访问推送通知响应？

Question

我以这种方式在我的应用程序中实现了推送通知

//MARK:- Register notifications

func registerForPushNotifications() {

    if #available(iOS 10.0, *){

        let center = UNUserNotificationCenter.current()
        center.delegate = self
        center.requestAuthorization(options:[.badge, .alert, .sound]) { (granted, error) in
            if (granted)
            {
                UIApplication.shared.registerForRemoteNotifications()
            }
            else{
                //Do stuff if unsuccessful...
            }
            // Enable or disable features based on authorization.
        }
    }

    else
    {
        //If user is not on iOS 10 use the old methods we've been using
        let types: UIUserNotificationType = [UIUserNotificationType.badge, UIUserNotificationType.alert, UIUserNotificationType.sound]
        let settings: UIUserNotificationSettings = UIUserNotificationSettings( types: types, categories: nil )
        UIApplication.shared.registerUserNotificationSettings( settings )
        UIApplication.shared.registerForRemoteNotifications()

    }

}

//MARK: Push Notifications Delegate Methods

func application( _ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data ) {

    var token = ""

    for i in 0..<deviceToken.count {
        //token += String(format: "%02.2hhx", arguments: [chars[i]])
        token = token + String(format: "%02.2hhx", arguments: [deviceToken[i]])
    }

    USER_DEFAULTS.setValue(token, forKey: "Device_ID")

    USER_DEFAULTS.synchronize()

}

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

}

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

    UIApplication.shared.applicationIconBadgeNumber = 0

    alertRemoteNotification(userInfo as NSDictionary)
}

//Code for showing alert when in foreground

func alertRemoteNotification(_ userInfo : NSDictionary)
{
    if UIApplication.shared.applicationState == .active {

        if let aps = userInfo as? NSDictionary {

            if let apsDidt = aps.value(forKey: "aps") as? NSDictionary {

                if let alertDict = apsDidt.value(forKey: "alert") as? NSDictionary {

                    if let notification_type = alertDict.value(forKey: "name") as? String {

                        if let notification_Message = alertDict.value(forKey: "body") as? String {

                            let alert = UIAlertController(title: notification_type.capitalized + " Alert", message: notification_Message, preferredStyle: UIAlertControllerStyle.alert)
                            let okayBtn = UIAlertAction(title: "OK", style: .default, handler: { (action) -> Void in

                                // When Okay

                            UIApplication.shared.applicationIconBadgeNumber = 0

                                if #available(iOS 10.0, *) {

                                    let center = UNUserNotificationCenter.current()
                                    center.removeAllDeliveredNotifications() // To remove all delivered notifications
                                    center.removeAllPendingNotificationRequests()
                                } else {
                                    // Fallback on earlier versions
                                    UIApplication.shared.cancelAllLocalNotifications()
                                }

                                let rootViewController = self.window!.rootViewController as! UINavigationController
                                let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
                                let dashBoardVC = mainStoryboard.instantiateViewController(withIdentifier: "DashBoardVC") as! DashBoardVC
                                rootViewController.pushViewController(dashBoardVC, animated: false)                                    
                            })
                            let cancelBtn = UIAlertAction(title: "Cancel", style: .default, handler: { (action) -> Void in

                                UIApplication.shared.applicationIconBadgeNumber = 0

                                if #available(iOS 10.0, *) {

                                    let center = UNUserNotificationCenter.current()
                                    center.removeAllDeliveredNotifications() // To remove all delivered notifications
                                    center.removeAllPendingNotificationRequests()
                                } else {
                                    // Fallback on earlier versions
                                    UIApplication.shared.cancelAllLocalNotifications()
                                }
                            })
                            alert.addAction(okayBtn)
                            alert.addAction(cancelBtn)

                            self.window?.rootViewController!.present(alert, animated: true, completion: nil)
                        }
                    }
                }
            }
        }
    }
    else {

        let rootViewController = self.window!.rootViewController as! UINavigationController
        let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let dashBoardVC = mainStoryboard.instantiateViewController(withIdentifier: "DashBoardVC") as! DashBoardVC
        rootViewController.pushViewController(dashBoardVC, animated: false)
    }
}

//Delegate methods

@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {

    completionHandler([.sound, .alert, .badge])

    UIApplication.shared.applicationIconBadgeNumber = 0

}

@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {

    let userInfo = response.notification.request.content.userInfo as NSDictionary

    completionHandler()

    self.alertRemoteNotification(userInfo as NSDictionary)
}

我可以在点击通知横幅后访问响应但实际问题是当我在前台时我需要显示带有通知响应的警报而不点击通知横幅.请告诉我如何在不点击通知横幅的情况下获得响应.

Answer 1

iOS 10+ 提供委托userNotificationCenter:willPresentNotification:withCompletionHandler

询问代理如何处理应用程序在前台运行时到达的通知。

仅当应用程序打开时才会调用。

您也可以用于CONTENT-AVAILABLE=1触发方法。

FLOW :(没有录音通知，content-available:1)

应用程序打开状态：- willPresentNotification(ios10+) ->didReceiveRemoteNotification:fetchCompletionHandler

后台应用程序：-didReceiveRemoteNotification:fetchCompletionHandler

应用程序已关闭：- 除非通过单击“通知”打开应用程序，否则您不会收到通知数据

替代方法：使用丰富通知

您可以使用通知扩展来创建自定义推送通知（内容包括图像/视频）。通知服务扩展和通知内容扩展用于实现此目的。mutable-content:1需要触发此操作。在这里您可以下载图像，获取数据等。 [但数据只能通过UserDefaults（应用程序组）与应用程序共享，如果我错了请纠正我]

你可以随便搜索一些教程