如何识别UNUserNotificationCenter是随之而来的(：is )

Question

在这里，我使用UNUserNotificationCenter反复触发通知。当通知被触发时，我遇到了问题，我想在不采取任何行动的情况下调用函数。有人能告诉我怎么做吗？

    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        print(" Foreground Notification IS CALLED ")
        completionHandler([.badge, .banner, .sound])
    }

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        print(" Nikan Did recieve calling ")

        if response.actionIdentifier == "Okay" {
            print(" Notification Clickced ")
        }
        completionHandler()
    }

    func createNotification() {
        let content = UNMutableNotificationContent()
        content.title = "Notification"
        content.subtitle = "Wow, Notification"
        content.categoryIdentifier = "Actions"
        content.sound = UNNotificationSound.defaultRingtone

        // show this notification five seconds from now
        let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 60, repeats: true)
        // choose a random identifier
        let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)

        // notification actions
        let okay = UNNotificationAction(identifier: "Okay", title: "Okay", options: .destructive)
        let category = UNNotificationCategory(identifier: "Actions", actions: [okay], intentIdentifiers: [], options: [])

        UNUserNotificationCenter.current().setNotificationCategories([category])

        //    UNUserNotificationCenter.current().add(request)
        UNUserNotificationCenter.current().add(request, withCompletionHandler: { error in
            if let error = error {
                // Something went wrong
                print(error)
            }
        })
    }

当触发UNUserNotificationCenter的通知时，我需要一个响应来调用一个函数。

Answer 1

问:当收到通知时，如何调用函数？

答:当你收到通知时(：in )，发布NSNotification并在你的UIViewController中观察它。在观察者的#selecteor方法中调用函数。

当点击推送通知时，DidReceive会触发，在您的情况下，应用程序处于后台，如果应用程序是通过单击push通知打开的，那么DidReveive将被触发。

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        let pushInfo = response.notification.request.content.userInfo
// post NSNotification here
// You also have data fetched from push notification (if any) in pushInfo variable
}