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
