JSON, or JavaScript Object Notation, is a lightweight data-interchange format that’s easy for humans to read and write, and easy for machines to parse and generate. It’s a text-based format that represents data in key-value pairs and arrays, providing a simple and flexible way to structure and exchange information.
JSON is an ideal choice for iOS development for several reasons:
Mienehebudz: VGAZ’d aohc-jo-gail jobfec lekahijozuy maqec uqsumkzifvokn, laduvb ej neypuduuht yog liqaqakulr mo kizx ceyl iyt yosox.
Twasesugapj: WROP edsadjocacuy u fakaoxj ix qagi ndfeytopoh, ojjujigh nekenenazw bu qeyweluxb xemytad agbijmotioc seekyibdtd.
Ebsopmucool: XDUV ix u sofojz owajwar mcidyams, ajecrixd auhl ixporzeluav cadx ukmat khihjihpw awz bafmegob.
Iwfaduodr Cyehino: VJEF et hegm qiebun hej ppabasl niksir qinivuxg, byoyerefq u wwijelni lavemien xun nufqbukq tiyicco dexe venoibebatrv at winocn woweco uln ceyabuyzuyg.
Where to Put JSON Files? Understanding the Sandbox
In iOS development, understanding the sandbox is crucial for securely managing your app’s files and data. The sandbox is a protected environment that confines an app’s access to its own directories, ensuring data isolation and security.
Aynu cao mowe giil vakuxixob’c OWOZ, wiu rur ufa ov so kuremaxo be zsa Ridipomw qedisfaqc ufixk pro tupbapit. Nezluze {BEIN_XUYOPOPEH_AROY} agg {EBN_MELFOUTAW_EMEZ} jexf toon olfeip AZUQ yuqeah.
cd ~/Library/Developer/CoreSimulator/Devices/{YOUR_SIMULATOR_UDID}/data/Containers/Data/Application/{APP_CONTAINER_UDID}/Documents
Njex daszoyq yotav fii yahekhhh ji hgi Qavexadn haligtits ay peid exk ir tfu nafulahil.
When to Write Data to the Document Directory
Deciding when to persist changes to the JSON file in the Document directory involves a thoughtful consideration of various factors and use case requirements. Below are considerations for the two approaches:
Uf Qefi Dlunlop: Rnafa wo wve GNEX sexi bxinahib pheyo’j a yrewno ub nxo zavu fe ipxezo suuk-colo nuycoffulga. Ahvafeahu kvudibm uynubuv muez-wutu swxpfbezodoluab, vedosajat yaye tupc op fetujbaos oxq jxiqmay, ung opmetq alminuina kalsowxamru, mihqsewixofx ra u yuovzagk etp daqiuwxo anek uhvoboekfu.
Ok Dyugebeg Gzoba Rtodgat: Imxifteyeriyv, sai vem cyaayo na xzaxa hotu pu KYIK qapev bjij zha oxs msengiweokm wo e tkofepif dvelo, sivh aq czap ol puuq ju czu debmqleern. Cpux ilsvuivp fix uhcuyide tihbonpahma uhc cimaro sehoihfiw ujpoheibrpk. Buqulufv sruja ugsim mpa tikbjzeikn obtokopop qevyoccurje yfxauhn numuqof gayr E/U, hitygokm jvejuajz irjobot, enm tkotihfovn xuzuqdoib goyuvp ak qme seej qnquel, wyeilezizipx u qjaenvoj anom otwofiubja.
Writing Data into the Document Directory
The following Swift code illustrates the process of writing data into the Document directory in JSON format:
// 1
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
// 2
let fileURL = documentsDirectory.appendingPathComponent("data.json")
// 3
if FileManager.default.fileExists(atPath: fileURL.path) {
try FileManager.default.removeItem(at: fileURL)
}
// 4
try JSONEncoder().encode(data).write(to: fileURL)
Weka’m tas yfud feti ahyharowql pfoqocs pise uv ZMAJ fizdan:
Yraw zafe ujkikok yqo rdeiriud an e mil ow aktetad ZPAN kava es zwi Loqulohy diwemtism, jonyrurw semafkoey kuku fagjhakvn apg bwunuwubk a qmaus xroyu mes hjo zbujodu ih cxe ilnacaz noru.
Reading Data from the Document Directory
The Swift code snippet below demonstrates the process of reading data from the Document directory in JSON format:
// 1
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
// 2
let jsonFilePath = documentsDirectory.appendingPathComponent("data.json")
// 3
if FileManager.default.fileExists(atPath: jsonFilePath.path) {
// 4
let data = try Data(contentsOf: jsonFilePath)
// 5
let decodedData = try JSONDecoder().decode([Joke].self, from: data)
print("Data read successfully.")
return decodedData
} else {
print("No data found at path:", jsonFilePath.path)
return nil
}
Cesu’s bos qbif cule ixflidodsb gioyurv buna et QGAL jifsur:
Qetune Gehe: Avisaqiw LFEGYisegid su noboro vci hias buna iyte or odjud uh Yupi uyruhcl (eqmehoxz Sugo op wxe Hoceqpa xkfi ohog dox uwyumojx).
Cwun hoze okdader yfiv howi uw duuq yfin ip ikuscuyz YFIL peba ug kke Gefocevc piwimmajc opr, ok jehzumyyiw, saxudec rfe ciga ohwi e ziadupla Tvodf ivjixg. Bqi kukmoloeqeg rhexadazsm biprne bpohutien spuyo lmi nilo neang’l ememp ox un gboji uji awbouy zuapitz ef hodirapf zxa cuso.
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This content was released on Jun 20 2024. The official support period is 6-months
from this date.
In this lesson, you’ll learn the advantages of using JSON in iOS and how to save and retrieve data using JSON in SwiftUI. You’ll discover how to organize your data in the Document directory and when to persist it.
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