Swift version: 5.10
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.
GO FURTHER, FASTER Unleash your full potential as a Swift developer with the all-new Swift Career Accelerator: the most comprehensive, career-transforming learning resource ever created for iOS development. Whether you’re just starting out, looking to land your first job, or aiming to become a lead developer, this program offers everything you need to level up – from mastering Swift’s latest features to conquering interview questions and building robust portfolios.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 8.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Link copied to your pasteboard.