ios.swift

let functions = Functions.functions()
functions.useFunctionsEmulator(origin: "http://localhost:5001")

functions.httpsCallable("generateSound").call() { (result, error) in
  if let error = error as NSError? {
    if error.domain == FunctionsErrorDomain {
      let code = FunctionsErrorCode(rawValue: error.code)
      let message = error.localizedDescription
      let details = error.userInfo[FunctionsErrorDetailsKey]
      print(code ?? "", message , details ?? "")
    }

    print(error.localizedDescription)
    return
  }

  print(result)      
}