Hi! Someone can help me to understund how can i call a swift function from my ios kotlin multiplatfo...

# multiplatform

[Federico Amura]

Hi! Someone can help me to understund how can i call a swift function from my ios kotlin multiplatform code?

i added

external fun swiftWriteLine(path: String, line: String)

and then in the swft folder i added a file with

public static func swiftWriteLine(path: String, line: String) {
    print("Hola desde Swift!")
}

But its not working... it says external function <root>.swiftWriteLine must have @TypedIntrinsic, @SymbolName, @GCUnsafeCall or @ObjCMethod annotation
where i have to add these anotations?

[Jeff Lockhart]

Kotlin only interops with Objective-C. Swift code will need the @objc attribute for Objective-C/Kotlin compatibility.

[Federico Amura]

@Jeff Lockhart Should I add the @objc before the function name in the Swift function?

[Jeff Lockhart]

Yes, similar to an annotation in Kotlin. See examples.

[Federico Amura]

Screenshot 2023-09-13 at 4.31.45 PM.png,Screenshot 2023-09-13 at 4.31.53 PM.png,Screenshot 2023-09-13 at 4.32.00 PM.png

[Federico Amura]

@Jeff Lockhart thanks for the quick help. unfortunately it's still not working. any clue?

[Jeff Lockhart]

You should create a .def file to define the cinterop that will generate the Kotlin bindings to the Objective-C (Swift) code. Read the docs here and here for details.

[Federico Amura]

will do. thanks!