Module not found when using inheri… | Apple Developer Forums

Module not found when using inheritance

PLATFORM AND VERSION

Development environment: Xcode 16.4 (16F6), macOS 15.5 (24F74) Run-time configuration: iOS 18.3.1

DESCRIPTION OF PROBLEM

I cannot build my app due to a module not found error when I'm importing Sample-Swift.h header to an ObjectiveC file.

I need to use Swift code to ObjectiveC file with Swift code using an external XCFramework.

It seems to be related to a mix with ObjectiveC and Swift code when Swift code uses class inheritance from FZWorkoutKit class.

With a full Swift project, no issue.

STEPS TO REPRODUCE

Project https://fizzup.s3.amazonaws.com/files/public/Sample-WK.zip

Open the provided project and try to build it. The issue occurs.

In MyObject.m file, if you comment the first import (Sample-Swift.h), no issue occurs but I cannot use my Swift code (MyFile class).
Uncomment the line commented in step 1.
Go to MyFile.swift and change class inheritance from GoModeController (from FZWorkoutKit framework) to UIView (from UIKit). No issue occurs.