BLACK FRIDAY: Save 50% on all my books and bundles! >>

How to sort the keys of your JSON using Codable

Swift version: 5.10

Paul Hudson    @twostraws   

When you use JSONEncoder and Codable to create JSON from your Swift data, your properties are not guaranteed to be written out in any particular order. This is usually fine, because relying on key ordering in your JSON is almost certainly a bad idea. However, if you’re debugging a large type and it’s hard to dig through keys to find what you want, JSONEncoder has the perfect option for you: you can sort your JSON keys alphabetically.

To make it happen, change the outputFormatting property of your JSONEncoder object to be .sortedKeys, like this:

let encoder = JSONEncoder()
encoder.outputFormatting = .sortedKeys

Now any JSON you produce will use alphabetical order for your keys, based on the names of each of your properties.

Save 50% in my Black Friday sale.

SAVE 50% All our books and bundles are half price for Black Friday, so you can take your Swift knowledge further for less! Get my all-new book Everything but the Code to make more money with apps, get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn Swift Testing, design patterns, and more.

Save 50% on all our books and bundles!

Available from iOS 8.0

Similar solutions…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

BUY OUR BOOKS
Buy Everything but the Code Buy Pro Swift Buy Pro SwiftUI Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Interview Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Beyond Code

Was this page useful? Let us know!

Average rating: 3.0/5

 
Unknown user

You are not logged in

Log in or create account