Where are the Swift function declarations?

Question

Created Feb ’16

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When a swift framework is built, where do the public header for the classes/functions stored? The reason I ask is because when I open the framework in finder there is a Headers folder that has two headers, but they don't contain my public classes/functions. When I import the framework into a swift project and I "command+left click" i get a list of import statements and my public classes and functions. How can I find this file in a framework folder structure?

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Answer 1

DTS Engineer OP

Apple

Feb ’16

Swift doesn’t use headers, even when you create a framework. Rather, Swift exports the framework’s interface via a module. Check out the

Modules

directory within your framework. This is a binary file, so you won’t be able to read it like you would a header.

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Apple Developer Relations, Developer Technical Support, Core OS/Hardware

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Answer 2

ibessa OP

Feb ’16

So there is a module.modulemap file which has

framework module Framework1 {
    umbrella header "Framework1.h"
   
    export *
    module * { export * }
}
module Framework1.Swift {
    header "Framework1-Swift.h"
}

This tells me nothing about what is public.

Within the same folder as module.modulemap, there is a folder named Framework1.swiftmodule which has x86_64.(swiftdoc|swiftmodule) files. These files list nothing to a developer who would like to peak into what is public.

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Answer 3

DTS Engineer OP

Apple

Feb ’16

Right. As I said, Swift doesn’t use text-based headers. However, if you add the framework to a client project, import it in Swift, and then command-click on the framework name, Xcode will show you its public interface. For example, for a framework called

QFramework

, the import would look like this:

import QFramework

and command-clicking on

QFramework

would reveal its public interface.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

0

Answer 4

ibessa OP

Feb ’16

That's what I thought. Thanks.

0

Answer 5

kontiki OP

Jul ’20

Is there a way of generating the public interface from the command line, instead of having to go into Xcode and command clicking on the framework name. I need to automate a process and that would really help.

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