Question

收到远程通知并且用户采取行动（关闭/解除除外）后，应用委托获得回调：

- （void）application：（UIApplication *）application didReceiveRemoteNotification：（NSDictionary *）userInfo fetchCompletionHandler：（无效（^）（UIBackgroundFetchResult））completionHandler

或者如果应用程序已注册通知操作：

- （void）application：（UIApplication *）application handleActionWithIdentifier：（NSString *）identifier forRemoteNotification：（NSDictionary *）userInfo completionHandler :( void （^）（））completionHandler

我的问题是，当收到远程通知时应用程序是否收到回调？那是在用户采取任何行动之前。感谢您的投入。

Answer 1

不，该应用程序未获得通知已到达设备的任何迹象。如您在问题中的两个案例中所描述的那样，只有在通知实际发送到应用程序时才会收到委托调用。

Answer 2

extension AppDelegate: UNUserNotificationCenterDelegate {

    public func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        completionHandler([.alert,.sound,.badge])
        print("NOtification received")
    }

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

    print("original body was : \(response.notification.request.content.title)")
    print("Tapped in notification")

    }
}

Answer 3

可以使用后台更新通知，如https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/pushing_background_updates_to_your_app 但是，此解决方案的用例受到允许以这种方式发送的通知数量很少的限制（文档当前声明“不要尝试每小时发送超过 2 或 3 个”）。

Answer 4

是的，当然，当收到远程通知时，app会收到以下代理方法的回调。

 func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
    print("DEVICE TOKEN = \(deviceToken)")
}
func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {
    print(error)
}
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
    print(userInfo)
}

收到远程通知时是否有应答代理的回调？

4 个答案: