Facebook iOS8 SDK build module error for FBSDKCoreKit

Question

I am trying to add the Facebook SDK to my iOS 8 Objective-C app in Xcode. I did the install according to the FB-dev instructions. However, I get a "Could not build module 'FBSDKCoreKit'" error when I add the header to my AppDelegate.m file.

#import "AppDelegate.h"
#import <FBSDKCoreKit/FBSDKCoreKit.h>

Based on what I read elsewhere

1. I have already cleaned the build and re-installed Xcode.
2. I also re-installed the Facebook SDK installer and tried to add it to a blank project (in case there was something corrupt with my app).
3. I have double checked the plist and the framework files FB lists in the instructions, but nothing has seemed missing.

I'm stumped.

Answer 1

FBSDKCoreKit can't be built because of "include of non-modular header inside framework module" error in FBSDKAppLinkResolver.h header file: in #import <Bolts/BFAppLinkResolving.h> line.

The solution from Swift compiler error: "non-modular header inside framework module" (switching CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES = YES) did't help me.

My solution:

1. Create in Bolts.framework file module map: Modules/module.modulemap (like in FBSDKCoreKit.framework)

2. Put such code inside

   framework module Bolts {
   umbrella header "Bolts.h"
   
   export *
   module * { export * }
   
   
   explicit module BFAppLinkResolver {
       header "BFAppLinkResolver.h"
       link "BFAppLinkResolver"
       export *
   }}
   

Interesting fact is that in FBSDKCoreKit such scheme is realized by Facebook, why didn't they apply it into Bolts...

Answer 2

Not sure if it has side effects but setting the "Allow Non-modular Includes in Framework modules" setting to YES in Build settings solved the problem for me. Hope it works for you too.

Answer 3

Just doing the following let me to build the app successfully.

In Build settings Set "Allow Non-modular Includes in Framework modules" flag to YES

And I didn't want to Set "Enable Modules" (c and Objective-C) to NO

Answer 4

For Objective-C I used Paul Lehn answer from: https://developers.facebook.com/bugs/362995353893156/

1. Add the -ObjC flag to your project's Other Linker Flags build setting. (if you don't want add to project configs, for initialise buttons classes)
2. "Allow Non-modular Includes in Framework modules" setting to YES in Build settings
3. Set "Enable Modules" (c and Objective-C) to No

(also don't forget add frameworks, for me it was: "AdressBook" "QuartzCore" "CoreLocation" "CoreGraphics" and if still not added, also "UIKit" "Foundation" "CoreData")

and its finally worked for me

all this used for linked FBSDK in custom folder in my project folder not from ~/Documents/FacebookSDK