Swift

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

Getting started with Property Wrappers in Swift

Property Wrappers in Swift allow you to extract common logic in a distinct wrapper object. Since the introduction during WWDC ...
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  •  5 min read Swift

Constraints in Core Data Entities explained

Constraints in Core Data are part of an entity configuration. Settings like the entity name and Spotlight display name might ...
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  •  4 min read Core DataSwift

NSManagedObject events: handling state in Core Data

An NSManagedObject lifecycle goes from insertion and updates until deletion in the end. All those events come with their own ...
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  •  4 min read Core DataSwift

How to use the #available attribute in Swift

Marking pieces of code as available per platform or version is required in the ever changing landscape of app development ...
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  •  5 min read Swift

Try Catch Throw: Error Handling in Swift with Code Examples

Try catch in Swift combined with throwing errors make it possible to nicely handle any failures in your code. A ...
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  •  4 min read Swift

How-to use Diffable Data Sources with Core Data

Diffable Data Sources were introduced at WWDC 2019 as a replacement for UICollectionViewDataSource and UITableViewDataSource. The API is available on ...
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  •  6 min read Core DataSwift

Diffable Data Sources Adoption with Ease

Diffable Data Sources were introduced at WWDC 2019 and are available since iOS 13. They're a replacement of the good ...
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  •  5 min read Swift

Persistent History Tracking in Core Data

WWDC 2017 introduced a new concept available from iOS 11 which is persistent history tracking. It's Apple's answer for merging ...
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  •  7 min read Core DataSwift

Write-Ahead Logging (WAL) disabled to force commits in Core Data

Write-Ahead Logging is the default journaling mode for Core Data SQLite stores since iOS 7 and OS X Mavericks. Journaling ...
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  •  4 min read Core DataSwift

Adding a closure as a target to UIButton and other controls in Swift

The target-action pattern is used in combination with user interface controls as a callback to a user event. Whenever a ...
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  •  2 min read Swift

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