ios - 当我的应用程序打开时，我收到横幅通知。我不想在我的应用程序打开时显示横幅

Question

我在我的 iOS 应用程序中使用 Firebase 通知，每当我收到通知时，即使应用程序打开，它也会显示为横幅。

当我们使用 iOS 原生远程通知方法时，这实际上不会发生。

我尝试检查是否调用了默认的 iOS 方法，但它不起作用。

注册:

if(SYSTEM_VERSION_GRATERTHAN_OR_EQUALTO(@"10.0")){
        UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
        center.delegate = self;
        [center requestAuthorizationWithOptions:(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error){
            if( !error ){
                [[UIApplication sharedApplication] registerForRemoteNotifications];
            }
        }];
    }
    else{
        [application registerForRemoteNotifications];
    }

对于设备 token :

- (void)messaging:(nonnull FIRMessaging *)messaging didRefreshRegistrationToken:(nonnull NSString *)fcmToken {
    // Note that this callback will be fired everytime a new token is generated, including the first
    NSString* deviceTkn = [[NSString stringWithFormat:@"%@",fcmToken] stringByReplacingOccurrencesOfString:@"<" withString:@""];
}

用于接收通知:

-(void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler{
    //Called when a notification is delivered to a foreground app.
    NSDictionary *userInfo = notification.request.content.userInfo;
    completionHandler(UNNotificationPresentationOptionAlert);
}

请帮我解决这个问题

Answer 1

在这里您可以设置演示样式警报，这就是显示横幅的原因。您应该根据苹果文档在完成处理程序中传递 UNNotificationPresentationOptionNone。

https://developer.apple.com/documentation/usernotifications/unusernotificationcenterdelegate/1649518-usernotificationcenter?language=objc

-(void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler{
    //Called when a notification is delivered to a foreground app.
    NSDictionary *userInfo = notification.request.content.userInfo;
    completionHandler(UNNotificationPresentationOptionAlert);
}