Articles, podcasts and news about Swift development, by John Sundell.

Using #function for UserDefaults key consistency

Published on 15 Mar 2017

Here's a neat little trick I use to get UserDefault key consistency in Swift (#function expands to the property name in getters/setters). Just remember to write a good suite of tests that'll guard you against bugs when changing property names.

extension UserDefaults {
    var onboardingCompleted: Bool {
        get { return bool(forKey: #function) }
        set { set(newValue, forKey: #function) }
    }
}

Support Swift by Sundell by checking out this sponsor:

Bitrise

Bitrise: My favorite continuous integration service. Automatically build, test and distribute your app on every Pull Request — which lets you quickly get feedback on each change that you make. Start 2021 with solid continuous integration from Bitrise, using hundreds of ready-to-use steps.