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

Struct convenience initializers

Published on 26 Apr 2018

I love to structure my code using extensions in Swift. One big benefit of doing so when it comes to struct initializers, is that defining a convenience initializer doesn't remove the default one the compiler generates - best of both worlds!

struct Article {
    let date: Date
    var title: String
    var text: String
    var comments: [Comment]
}

extension Article {
    init(title: String, text: String) {
        self.init(date: Date(), title: title, text: text, comments: [])
    }
}

let articleA = Article(title: "Best Cupcake Recipe", text: "...")

let articleB = Article(
    date: Date(),
    title: "Best Cupcake Recipe",
    text: "...",
    comments: [
        Comment(user: currentUser, text: "Yep, can confirm!")
    ]
)

Support Swift by Sundell by checking out this sponsor:

Essential Developer

Essential Developer: Learn the most up-to-date techniques and strategies for testing new and legacy Swift code in this free practical course for developers who want to become complete senior iOS developers. This virtual event includes lectures, mentoring sessions, and step-by-step instructions. Click to learn more.