Which of the following is the correct way to define a custom key mapping in a Swift Decodable struct?

easy📝 Syntax Q12 of 15

iOS Swift - Networking

Which of the following is the correct way to define a custom key mapping in a Swift Decodable struct?

ADeclare properties as <code>lazy var</code>

BUse an enum conforming to <code>CodingKey</code> with cases matching JSON keys

COverride the <code>init()</code> method without parameters

DUse <code>@IBOutlet</code> annotations on properties

Step-by-Step Solution

Solution:

Step 1: Recall how to customize keys in Decodable
Swift uses an enum conforming to CodingKey to map JSON keys to property names.
Step 2: Identify the correct syntax
The enum cases represent the JSON keys, allowing custom mapping.
Final Answer:
Use an enum conforming to CodingKey with cases matching JSON keys -> Option B
Quick Check:
Custom keys = enum CodingKey [OK]

Quick Trick: Custom keys use enum CodingKey with cases [OK]

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