Enumeration
JSONEncoder.KeyEncodingStrategy
iOS 8.0+
iPadOS 8.0+
Mac Catalyst 8.0+
macOS 10.10+
tvOS 9.0+
watchOS 2.0+
The values that determine how to encode a type’s coding keys as JSON keys.
enum KeyEncodingStrategyOverview
Note
Key encoding strategies other than JSONEncoder.KeyEncodingStrategy.useDefaultKeys may have a noticeable performance cost because those strategies may inspect and transform each key.
Topics
Enumeration Cases
case convertToSnakeCaseConvert from “camelCaseKeys” to “snake_case_keys” before writing a key to JSON payload.case custom(([any CodingKey]) -> any CodingKey)Provide a custom conversion to the key in the encoded JSON from the keys specified by the encoded types. The full path to the current encoding position is provided for context (in case you need to locate this key within the payload). The returned key is used in place of the last component in the coding path before encoding. If the result of the conversion is a duplicate key, then only one value will be present in the result.case useDefaultKeysUse the keys specified by each type. This is the default strategy.
Relationships
Conforms To
Swift.SendableSwift.SendableMetatype