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iOS

Posted by Nic Clark
Nic Clark
2,192 Points

Swift / Xcode Function Error

I can't get a function with two parameters to work e.g.

func someFunction(firstParameterName: Int, secondParameterName: Int) { // function body goes here // firstParameterName and secondParameterName refer to // the argument values for the first and second parameters }

someFunction(1, 2)

THE ERROR RETURNED IS

Playground execution failed: /var/folders/yw/d3ntrqd13jl_xd_tkg3nm5p00000gq/T/./lldb/1036/playground13.swift:13:13: error: missing argument label 'secondParameterName:' in call someFunction(1,2) ^ secondParameterName:

NOTE:

I have version 7 of Xcode running on a macbook pro which is less than 6 months old.

thanks for your help

1 Answer

Myers Carpenter
Myers Carpenter
6,421 Points

Swift requires you to name the second parameter when you call your functions. So you can't write someFunction(1, 1) but rather someFunction(1, secondParameterName: 2). I believe the goal is to make it easier to read, but it feels weird you can't define add(1, 2).

More on this in Apple's Swift Docs.

Nic Clark
Nic Clark
2,192 Points

thanks Myers !!!! ... that worked. I agree ... seems weird.