Call Objective-C from Swift within a Framework target WITHOUT making Objective-C methods public

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Created Jul ’19

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Hello, I'm working on a mixed-source (Objective-C + Swift) framework project and need to call some Objective-C methods from Swift. However, I do not want to make the Objective-C methods public in doing so. Previously, this could be accomplished using a bridging header, but bridging headers are no longer supported in a framework target. The following article explains how this can be done via an umbrella header instead:

https://developer.apple.com/documentation/swift/imported_c_and_objective-c_apis/importing_objective-c_into_swift

But it seems that using an umbrella header to bridge Objective-C to Swift requires making the Objective-C APIs public, which I do not want. Is there a supported way to bridge Objective-C to Swift within a framework without making the Objective-C methods public?

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Answer 1

jp43 OP

Jul ’19

Alright found a perfect working solution:

1. Create 'module.modulemap' file inside your framework folder

module YourFramework_Private {
    header "Location/To/Private-Header.h"
    export *
}

2. Set "Import Paths" to the folder containing 'module.modulemap' file. For example: $(SRCROOT)/YourFramework

3. Then you can import that Private module inside any file within your Framework. But this private module is not going to be visible outside your framework

import YourFramework_Private

Reply in this post if you have questions or Approve this as a correct answer if this fixes your issue.

Thank you

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