Hey @dooboolab,
Sorry about this frustrating process. We try to simply the process as much as we can but once you detach things get much more complex and if you don’t have a solid knowledge base of how cocoapods and JS interplay with each other, it gets pretty murky.
One thing I’d recommend, is to compare your Podfile and Podfile.Lock` with a new detached project. I posted them in this thread if you want to check them out: Upgrading to SDK 26 - Pod install issue - #9 by adamjnav
Cheers,
Adam