ios - 如何在应用程序处于后台时阅读通知？

Question

我正在使用 swift 3 并尝试读取 didReceiveRemoteNotification 中的通知

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

它在应用程序运行时工作，但在应用程序处于后台(非事件状态)时不打印任何内容。当应用程序处于后台(非事件状态)时，如何阅读通知。

Answer 1

在应用程序中获取后台通知的适当权限并在适当的 viewController 中采用 UNUserNotificationCenterDelegate 后。您可以实现此方法以在后台触发通知并采取操作来执行通知中的任何操作。要从通知中执行任何操作，您需要采用函数userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler finishHandler: @escaping () -> Void)。

func startNotifications() {




        let notificationCenter = UNUserNotificationCenter.current()

// to include any action in the notification otherwise ignore it.

        let action = UNNotificationAction(identifier: "ActionRelatedIdentifier", title: "Name which you want to give", options: [.destructive, .authenticationRequired])

        let category = UNNotificationCategory(identifier: "CategoryName", actions: [stopAction], intentIdentifiers: [],  options: [])

        notificationCenter.setNotificationCategories([category])

        let content = UNMutableNotificationContent()
        content.title = "Your Title"
        content.body = "Message you want to give"
        content.sound = UNNotificationSound.default



      // To trigger the notifications timely and repeating it or not  
           let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1.5, repeats: false)





        content.categoryIdentifier = "CategoryName"



            print("Notifications Started")

            let request = UNNotificationRequest(identifier: "NotificationRequestIdentifier", content: content, trigger: trigger)

            notificationCenter.add(request, withCompletionHandler: { (error) in
                if error != nil {
                    print("Error in notification : \(error)")
                }
            })


    }

免责声明:请根据您的需要应用解决方案，并询问是否发生任何错误。此代码用于触发后台通知。