Swift version: 5.1
When you use
Codable to create JSON from your Swift data, it comes out in a compressed format by default – it has all its excess whitespace removed. This makes it efficient for transferring over the network, but hard to debug because it’s just a big jumble of words.
For debugging purposes, it’s a good idea to enable pretty printing for your encoded JSON, which will tell
JSONEncoder to separate everything using line breaks and spaces so you can read it more easily.
To make this happen, set the
outputFormatting property of your JSON encoder to be
.prettyPrinted, like this:
let encoder = JSONEncoder() encoder.outputFormatting = .prettyPrinted
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Available from iOS 8.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.