What is Codable and how does it work? | Artur Baghdasaryan

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Transcript

1. SwiftCoders Yerevan Artur Baghdasaryan March, 2019
2. Who am I? • Studied in Faculty of Mathematics and Mechanics, YSU • Working at SFL from 2012 as an iOS developer
3. What is a Codable? • typealias Codable = Decodable & Encodable • A type that can convert itself into and out of an external representation • Encoding and Decoding Custom Types
4. Encodable/Decodable • func encode(to: Encoder) • init(from: Decoder) • Conforming Types (Int, Double, Float, String, Array, Dictionary … )
5. JSONDecoder/JSONEncoder • KeyDecodingStrategy (.convertFromSnakeCase) • DateEncodingStrategy (deferredToDate, .iso8601)
6. Examples
7. protocol CodingKey enum CodingKeys: String, CodingKey { case name case age case type }
8. DecodingError • DecodingError.dataCorrupted • DecodingError.keyNotFound • DecodingError.typeMismatch • DecodingError.valueNotFound
9. Codable vs NSCoding
12. Unit testing
13. Thank you
14. Q & A