How to specify your own date format with Codable and JSONEncoder
When using JSONEncoder to encode dates, there are a handful of built-in date formats you can choose from. If none of them fit your needs, why not make your own? You can configure a DateFormatter using whatever date and time format you want, then pass that to the JSONEncoder as its dateEncodingStrategy property, like this:
let encoder = JSONEncoder()
let formatter = DateFormatter()
formatter.dateStyle = .full
formatter.timeStyle = .full
encoder.dateEncodingStrategy = .formatted(formatter)That converts any Date properties to be the fullest possible string for your locale, e.g. "Monday, February 5, 2018 at 9:28:10 PM Greenwich Mean Time”.
Available from iOS 8.0
Did this solution work for you? Please pass it on!
Other people are reading…
- How to loop over non-nil items in an array
- What are convenience initializers?
- How to format JSON using Codable and pretty printing
- How to convert a float to a CGFloat
- How to remove duplicate items from an array
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Become a Swift expert
I wrote a book called Pro Swift that's dedicated to helping you master the Swift language, and it includes seven hours of video demonstrating each technique!
