You have a JSON with nested keys like {"user": {"id": 1, "name": "Bob"}}. How can you decode the nested 'name' using a custom decoder configuration in Swift?

hard📝 Application Q8 of 15

iOS Swift - Networking

AUse nested containers in init(from decoder: Decoder) to decode 'name' inside 'user' key

BAdd 'user.name' as a case in CodingKeys enum

CDecode 'name' directly without any special handling

DUse a flat struct without nested decoding

Step-by-Step Solution

Solution:

Step 1: Recognize nested JSON structure
The 'name' key is inside the 'user' object, so direct decoding won't work.
Step 2: Use nested containers in custom init
Implement init(from decoder: Decoder) and use nestedContainer(keyedBy:forKey:) to access nested keys.
Final Answer:
Use nested containers in init(from decoder: Decoder) to decode 'name' inside 'user' key -> Option A
Quick Check:
Nested JSON requires nested containers decoding [OK]

Quick Trick: Use nestedContainer to decode nested JSON keys [OK]

Common Mistakes:

Trying to flatten nested keys in CodingKeys
Ignoring nested structure causing decoding failure
Assuming direct decoding works for nested keys

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More iOS Swift Quizzes

You have a JSON with nested keys like {"user": {"id": 1, "name": "Bob"}}. How can you decode the nested 'name' using a custom decoder configuration in Swift?

Step 1: Recognize nested JSON structure

Step 2: Use nested containers in custom init

Final Answer:

Quick Check:

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