Saving Data in iOS

May 31 2022 · Swift 5.5, iOS 15, Xcode 13

Part 1: Files & Data

06. Saving & Loading Data

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Notes: 06. Saving & Loading Data

Foundation Data documentation

This course was originally recorded in April 2020. It has been reviewed and all content and materials updated as of November 2021.

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Now that you’ve learned about data types, and the relationship between data and bytes, IIt’s time to save the favoriteBytes array!

let favoriteBytesData = Data(
…Data(bytes: favoriteBytes)
let favoriteBytesURL = URL(fileURLWithPath: "Favorite Bytes", 
                           relativeTo: FileManager.documentsDirectoryURL)
favoriteBytesData.write(to: favoriteBytesURL)
try favoriteBytesData...
let savedFavoriteBytesData = try Data(contentsOf: favoriteBytesURL)
let savedFavoriteBytes = Array(savedFavoriteBytesData)
favoriteBytes == savedFavoriteBytes
favoriteBytesData == savedFavoriteBytesData