April 2020
Intermediate to advanced
528 pages
15h 40m
English
Content preview from iOS Programming: The Big Nerd Ranch Guide, 7th Edition
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22 Core Data
When deciding between approaches to saving and loading for iOS applications, the first question is “Local or remote?” If you want to save data to a remote server, you will likely use a web service. If you want to store data locally, you have to ask another question: “Archiving or Core Data?”
Your LootLogger application leveraged the Codable APIs along with a PropertyListEncoder to serialize your data so it could be persisted to the filesystem. The biggest drawback to that mode of archiving is its all-or-nothing nature: To access anything in the archive, you must deserialize the entire file, and to save any changes, you must serialize the entire file.
Core Data, on the other hand, can fetch a subset of the stored ...
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