how can i use this "https://developer.apple.com/documentation/corebluetooth/using_core_bluetooth_classic" sample code ?

i want to make a bluetooth classic code

i found sample code at apple web site

just like below

https://developer.apple.com/documentation/corebluetooth/using_core_bluetooth_classic

but i can't use...

i need some explanation for this,

i watched video below https://developer.apple.com/videos/play/wwdc2019/901

but i need more easy and detailed explanation.

this is all~~~ about ios bluetooth classic explanation in text.

please help me

is any other clips in youtube or sites that explain this easy and in detail ?

how can i use this "https://developer.apple.com/documentation/corebluetooth/using_core_bluetooth_classic" sample code ?
 
 
Q