How to fix XCode warnings? Native or Unity side?

Hi all,

i’m working on an Unity project for iOS.
First of all I managed to get rid of all warnings in Unity itself, but still there are a lot in the XCode project during building and it’s a request from the client to deliver the product clean of warnings. I think the biggest part of them are deprecations.
What is the best way now to fix those warnings? Do i need to adjust everything in the native part itself or can I also fix them in Unity (which would be the way i prefer)?

I attached an screenshot to have an overview of the warnings I’m getting:

3388672--266374--screenshot.png

Thanks in advance and best regards!

Maybe you could have a look at this thread: Blank Unity project = 600+ warnings on XCode