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JSON serialization hauv Swift yog dab tsi?
JSON serialization hauv Swift yog dab tsi?

Video: JSON serialization hauv Swift yog dab tsi?

Video: JSON serialization hauv Swift yog dab tsi?
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Anonim

Koj siv chav JSONSerialization rau hloov JSON rau Foundation objects thiab hloov cov khoom Foundation rau JSON. Cov khoom qib saum toj kawg nkaus yog NSArray lossis NSDictionary. Txhua yam khoom yog piv txwv ntawm NSString, NSNumber, NSArray, NSDictionary, lossis NSNull. Txhua tus yuam sij phau ntawv txhais lus yog piv txwv ntawm NSString.

Ntawm no, JSON serialization yog dab tsi?

JSON yog hom ntawv uas encodes cov khoom hauv ib txoj hlua. Serialization txhais tau tias hloov ib yam khoom rau hauv txoj hlua ntawd, thiab deserialization yog nws cov haujlwm inverse (hloov hlua -> khoom). Serialization tuaj yeem hloov cov khoom siv no rau hauv cov hlua byte rau kev siv.

Ib tug kuj yuav nug, dab tsi yog serialization hauv Swift? "Hauv computer science, hauv cov ntsiab lus ntawm kev khaws cov ntaub ntawv, serialization yog cov txheej txheem ntawm kev txhais cov ntaub ntawv cov qauv lossis cov khoom hauv lub xeev rau hauv hom uas tuaj yeem khaws cia lossis xa tawm thiab rov tsim kho dua tom qab. " Kuj tseem muaj lub tswv yim deserialization uas yog thim rov qab serialized cov ntaub ntawv rau peb cov khoom siv.

Ib yam li ntawd, tib neeg nug, JSON parsing hauv Swift yog dab tsi?

Swift JSON Parsing . JSON yog hom ntawv uas feem ntau siv los xa thiab tau txais cov ntaub ntawv los ntawm cov kev pabcuam hauv lub vev xaib. Cov chav kawm JSONSerialization yog siv rau parse a JSON cov ntaub ntawv mus rau hauv phau ntawv txhais lus ntawm tus yuam sij-tus nqi los ntawm kev hloov cov ntaub ntawv khoom. Hom ntawm a JSON cov ntaub ntawv yog [String: Any].

Kuv yuav ua li cas deserialize JSON hauv Swift?

Hauv Swift 4, Koj tuaj yeem siv Kev Txiav Txim Siab, CodingKey raws tu qauv kom deserialize JSON cov lus teb:

  1. Tsim cov chav kawm uas paub meej tias tus txheej txheem decodeable. class UserInfo: Decodable.
  2. Tsim cov tswv cuab ntawm chav kawm. var npe: String.
  3. Tsim JSON key enum uas tau txais los ntawm CodingKey.
  4. Implement init.
  5. Hu rau Decoder.

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