Can't import dependency installed with Cocoapods

ios swift xcode cocoapods flutter

Select your Project Target
Go to Build Settings.
Search for Header Search Paths.
Add this value $(SRCROOT)/Pods with recursive, then Xcode will resolve the path for you.

ios swift xcode cocoapods flutter

Are you opening the .xcodeproj or the .xcworkspace? Make sure it is the workspace whenever you install a cocoapod

ios swift xcode cocoapods flutter

I'll naively suppose you don't have use_frameworks! in you Podfile. If that's true, than you have two ways to go from here:

In your Runner-Bridging-Header.h add #import <FBSDKCoreKit/FBSDKCoreKit.h>, remove import FBSDKCoreKit from AppDelegate.swift and just continue writing the code.
Add use_frameworks! to your Podfile and run pod install again. That might bring some other issues, but if that works, than I'd suggest it.