Module not found inside 'Framework' -Swift.h file

Question

I have created this sample Swift framework which has GoogleMobileAds in it integrated through Cocoapods. I have a class NativeAdView which inherits from GADNativeAdView.

import GoogleMobileAds

@objc public class NativeAdView: GADNativeAdView {
    
}

I also have a sample target which is an Objective-C app. I import the framework header as below in my AppDelegate.m.

#import <SampleFramework/SampleFramework-Swift.h>

Now when I run the Objective-C target it throws an error inside the file SampleFramework-Swift.h

@import GoogleMobileAds; -------- Module 'GoogleMobileAds' not found.

However, if I change the parent class of NativeAdView to anything other than a Google ad class the error goes away and the build compiles and runs successfully.

Also @import GoogleMobileAds; line goes away from SampleFramework-Swift.h file

I can't figure out what is happening.

Github link - https://github.com/rishabdutta/FrameworkSample

Answer 1

First, update bundle identifiers of your targets SampleFramework, SampleSwift, SampleObjc to be different.

Try updating Podfile as follows. Cocoapods works this way that in your setup you have to specify 'Google-Mobile-Ads-SDK' for every target which uses it, but to avoid copying that line, you can use abstract_target so the dependency is automatically added to all targets inside:

use_frameworks!

abstract_target 'Common' do
  pod 'Google-Mobile-Ads-SDK'

  target 'SampleFramework' do
  end

  target 'SampleObjc' do
  end

  target 'SampleSwift' do
  end
end

But this way you will face a runtime warning "Class APMAdExposureReporter is implemented in both ...", but the app will work, the warning doesn't cause real problems - it's discussed here, but personally I don't know the best practice how to deal with it.