iOS Build Error: 'cannot find interface declaration for EXExpoAppDelegate' after adding Expo to React Native 0.79 with Turbo Modules
11:23 28 Dec 2025

I am developing a React Native app using version 0.79 with the New Architecture enabled. I have implemented a custom Native Module (Turbo Module) using Swift, which is bridged to Objective-C via a bridging header. This setup works perfectly in a bare project.

However, I need to use some Expo libraries, so I integrated Expo into my existing bare project using the standard command:

npx install-expo-modules@latest

After the installation, when I try to build the iOS project, the build fails with the following errors pointing to AppDelegate:

error cannot find interface declaration for 'EXExpoAppDelegate', superclass of 'AppDelegate'
error cannot find interface declaration for 'ModulesProvider', superclass of 'ExpoModulesProvider'
error cannot find interface declaration for 'ExpoReactNativeFactoryDelegate', superclass of 'ReactNativeDelegate'
error Failed to build ios project. "xcodebuild" exited with error code '65'.

It seems like the headers or definitions for the Expo modules (which were automatically added to AppDelegate by the script) are not visible to the compiler.

Project Setup:

  • React Native: 0.79.0

  • Architecture: New Architecture (Turbo Modules enabled)

  • Language: Swift & Objective-C (Bridging Header used)

  • Platform: iOS

  • Installation Method: Bare project -> npx install-expo-modules@latest

What I have checked:

  1. I verified that install-expo-modules modified my AppDelegate.h and AppDelegate.mm to inherit from EXExpoAppDelegate.

  2. I have run pod install inside the ios folder.

  3. My Swift Turbo Module works fine if I revert the Expo installation.

Reproduction: I have created a minimal reproduction repository demonstrating this issue: TurboModuleExp

Question: How can I resolve these issues.

Any help or guidance on how to resolve these header visibility issues would be appreciated.

ios react-native expo cocoapods