只需搜索XMPP服务器，就可以进行实时聊天，无需使用Pushkit，Pushkit仅在应用终止时用于视频通话通知.

Just search about XMPP server, for live chat there is no need for Pushkit, Pushkit is only for Video call notification when app is terminated.

使用XMPP服务器进行实时聊天集成.

Use XMPP server for live chat integration.

https://code.tutsplus.com/tutorials/building-a-jabber-client-for-ios-xmpp-setup--mobile-7190

什么是XMPP，如何在iOS聊天应用程序中使用它?