刚完成20集Connect4教程录制，近程双机联网对战。全网独家视频示范如何解决Xcode11中的一个联网问题。

第一集

第二集

第十七集

We replace MCAdvertiserAssistant with MCNearbyServiceAdvertiser because the former fails to work in the latest Xcode version 11.x. We got Declined when using MCAdvertiserAssistant. There is post in stack overflow: Multipeer Connectivity not working after Xcode 11 update https://stackoverflow.com/questions/58563621/multipeer-connectivity-not-working-after-xcode-11-update