Persistence: UserDefaults
Spring 2019 & Fall 2019 Additional Topic
What is Persistence?
In short, data persistence is keeping the data you are working with around. This means that the same data can be retrieved without being altered when the user closes and then re-opens the app.
Achieving Persistence in iOS
There are several ways to achieve persistence in iOS, including:
UserDefaults
CoreData
CloudKit
UIDocument
In the course, we focus on UserDefaults, which is used to achieve lightweight persistence, e.g. to store small amounts of data.
Lecture Slides
Lecture Demos
Persistence has been an additional topic for a few different semesters, so there's a few demos available!
Spring 2020 Demo
The following demo introduces SnapKit alongside using UserDefaults!
Spring 2019 Demo
The following demo involves using UserDefaults with custom classes by conforming the class to Codable.
Fall 2019 Demo
The following demo introduces SnapKit alongside using UserDefaults!
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