We're building an SDK (let's call it MyFramework) which is distributed as an .xcframework for developers to integrate it into their own apps. Recently, we've added tvOS support by adding it as a supported destination for the SDK. Essentially, the SDK became a cross-platform framework and easy to be adopted in both iOS and tvOS apps.
The .xcframework is generated fine, all builds correctly. We've tested the SDK integrated in test apps. We've also submitted an iOS archive app to the AppStore connect, just to make sure all is well with the AppStore submission.
However, when I tried submitting a tvOS archive app (that integrates the same SDK) to the AppStore connect, the build was marked as invalid binary and we've got the following error message:
ITMS-90562: Invalid Bundle - One of the nested bundles is built for a platform which is different from the main bundle platform. Please make sure that all bundles have correct platform specification.
First, I thought that any of the modules of the framework was not correctly configured for tvOS but that was not the case. Everything compiles ok and it runs in debug as expected. It only fails when trying to submit the tvOS app that integrates the SDK.
After a lot of investigating, we realised that the reason for the AppStore submission error is because we codesign the framework. We use codesign to distribute it as cryptographically signed xcframework.
codesign --timestamp -v --sign "Apple Distribution: Company (xxxxxxxxxx)" "MyFramework.xcframework"
As soon as we remove the above line from our CI/CD pipeline that generates the xcframework, and submit a tvOS archive app that integrates the unsigned framework, the AppStore submission error goes away and the TestFlight build can be tested.
I've also tried to just strip the _CodeSignature folder from the .xcframework package but it still fails. So the only solution currently is to not codesign the xcframework to be able to upload tvOS archive apps that integrate the SDK to the AppStore connect.
However, we're still puzzled as to why only the tvOS archive app gets the invalid binary error when it integrates a signed SDK. I feel like the error message is quite misleading if we have to stop signing the SDK xcframework for it to be accepted during the AppStore submission.
Anyone has any idea? Or has anyone encountered a similar issue? Thanks!