How to Save Data with UserDefaults - Swift

In this tutorial we walk through the basics of saving data using UserDefaults is Swift. We'll discuss what types of data you can save, some of the security issues involved, and how to make it all happen. In this example, we'll store a light or dark mode preference, as well as the name of a pet as a String. This tutorial was done in Swift 4.2 and Xcode 10.
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Source Code (Xcode 10, Swift 4.2):
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