当iOS12和Swift 4中应用处于后台时，didReceiveRemoteNotification不触发

Question

func application(
    _ application: UIApplication,
    didReceiveRemoteNotification userInfo: [AnyHashable : Any],
    fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {

    //Setting my code here according to requirement

}