UNUserNotificationCenter完成从未被称为Swift

Question

我的AppDelagate中有以下代码块：

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

        if response.actionIdentifier == UNNotificationDismissActionIdentifier {
            print ("Message Closed")
        }
        else if response.actionIdentifier == UNNotificationDefaultActionIdentifier {
            print ("App is Open")
        }

        // Else handle any custom actions. . .
    }

func showMessage()

    {
        let notification = UNMutableNotificationContent()
        notification.title = "Test"
        notification.subtitle = "This is a test"
        notification.body = "I need to tell you something, but first read this."
        notification.categoryIdentifier = "TESTAPP"
        notification.sound = UNNotificationSound.default()

        let notificationTrigger = UNTimeIntervalNotificationTrigger(timeInterval: 0.5, repeats: false)

        let request = UNNotificationRequest(identifier: "notification1", content: notification, trigger: notificationTrigger)

        UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
    }


func applicationDidEnterBackground(_ application: UIApplication) {

        let center = UNUserNotificationCenter.current()
        center.delegate = self

        self.showMessage()


    }

我的通知出现了，当我单击通知打开应用程序时，应用程序打开，控制台显示如下：

App是开放的 2017-07-23 14:48:56.182 call 3255:198009警告: UNUserNotificationCenter委托收到了对UNUserNotificationCenter的调用，但未调用完成处理程序。

因此，我的打印输出"App“显示，但我得到了它下面的完成处理程序错误。

Answer 1

在代码中添加completionHandler()

userNotificationCenter

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

    if response.actionIdentifier == UNNotificationDismissActionIdentifier {
        print ("Message Closed")
    }
    else if response.actionIdentifier == UNNotificationDefaultActionIdentifier {
        print ("App is Open")
    }

    // Else handle any custom actions. . .
    completionHandler()
}

Answer 2

您需要确保在方法中调用完成处理程序，以使系统知道处理通知的工作已经完成。

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

    if response.actionIdentifier == UNNotificationDismissActionIdentifier {
        print ("Message Closed")
    }
    else if response.actionIdentifier == UNNotificationDefaultActionIdentifier {
        print ("App is Open")
    }

    // Else handle any custom actions. . .

    // Execute completion handler
    completionHandler()
}