AppAuth.h file not found

Issue

The AppAuth.h file not found error occurs specifically when running the Carthage setup (works fine with Pods)

Environment

• Platform that you’re experiencing the issue on:
  • iOS
  • Android
  • iOS but have not tested behavior on Android
  • Android but have not tested behavior on iOS
  • Both
• Are you using Expo, e.g. ExpoKit?
  • No
  • Yes, I’ve not ejected
  • Yes, but I have ejected to ExpoKit
  • Yes, but I have ejected to vanilla React Native

Proposed Fix

For me, when this build error occurs it is not in my project but the RNAppAuth project. I can fix this by going and adding $(SRCROOT)/../../../ios/Carthage/Build/iOS/AppAuth.framework as a recursive header search path to the project.

If you modify the line found here: https://github.com/FormidableLabs/react-native-app-auth/blob/master/ios/RNAppAuth.xcodeproj/project.pbxproj#L211 to include this, then it works for me (albeit with a bug in the AppAuth-iOS, but that is a separate issue)

HEADER_SEARCH_PATHS = (
					"$(inherited)",
					/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
					"$(SRCROOT)/../../../React/**",
					"$(SRCROOT)/../../react-native/React/**",
					"$(SRCROOT)/../../../ios/Pods/AppAuth/**",
					"$(SRCROOT)/../../../ios/Pods/Headers/**",
					"$(SRCROOT)/../../../ios/Carthage/Build/iOS/AppAuth.framework/**"
				);