Swift

Learn more and get better in Swift using this list of Swift blog posts, tutorials, tips, and tricks.

ValueTransformer in Core Data explained: Storing absolute URLs

ValueTransformers in Core Data are a powerful way of transforming values before they get inserted into the database and before ...
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  •  7 min read Core DataSwift

SF Symbols: The benefits and how to use them guide

SF Symbols were introduced during WWDC 2019 and are a big present for us developers. Apple basically gave us free ...
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  •  9 min read Swift

@discardableResult in Swift explained: Ignoring return values

While writing methods in Swift you're often running into scenarios in which you sometimes want to ignore the return value ...
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  •  2 min read Swift

Core Data Performance: 6 tips you should know

Writing Core Data code with performance in mind helps to prepare your app for the future. Your database might be ...
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  •  5 min read Core DataSwift

Expressible literals in Swift explained by 3 useful examples

Expressible literals allow you to initialize types by making use of literals. There are multiple protocols available in the Swift ...
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  •  3 min read Swift

String Interpolation in Swift explained using 4 useful cases

Swift 5 introduced a decent version of string interpolation with SE-228 and updated the old version of the ExpressibleByStringInterpolation protocol ...
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  •  5 min read Swift

Using Custom debug descriptions to improve debugging

Custom debug descriptions can help you debug your own custom objects, structs, errors, and other types. Whenever you print out ...
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  •  5 min read DebuggingSwift

URLs in Swift: Common scenarios explained in-depth

URLs are everywhere in an app we built. We reference local files using bundle paths, we fetch data from a ...
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  •  5 min read Swift

Custom Operators in Swift with practical code examples

Custom operators in Swift can make your code easier to read and simpler to maintain. Code can be written less ...
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  •  5 min read Swift

Custom subscripts in Swift explained with code examples

Custom subscripts in Swift allow you to write shortcuts to elements from collections or sequences and can be defined within ...
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  •  4 min read Swift

NSFetchedResultsController extension to observe relationship changes

Apple provides us with great classes like the NSFetchedResultsController to interact with Core Data databases in our apps. The API ...
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  •  8 min read Core DataSwift

Testing private methods and variables in Swift

Testing private methods and variables is often something we run into when writing tests for our applications. You could think ...
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  •  6 min read Swift

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