A weekly Swift Blog on Xcode and iOS Development

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Swift Keywords

Do you know how to use each keyword in Swift?
Click on the keyword to learn more and explore code examples.

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Learn more about Swift

Task Groups in Swift explained with code examples

Task Groups in Swift allow you to combine multiple parallel tasks and wait for the result to return when all ...

• 4 min read Jan 17, 2023 / Concurrency Swift

Enum explained in-depth with code examples in Swift

Enum usage in Swift: If case, guard case, fallthrough, and the CaseIteratable protocol. These are all terms which could sound ...

• 5 min read Dec 27, 2022 / Swift

OptionSet in Swift explained with code examples

OptionSet in Swift allows you to define a set of options for configurations. It's the Swift variant of the well-known ...

• 3 min read Dec 13, 2022 / Swift

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Learn SwiftUI

How to use FormatStyle to restrict TextField input in SwiftUI

A custom FormatStyle can help you control the allowed characters of a SwiftUI TextField. You might want to allow numbers ...

• 3 min read Dec 06, 2022 / SwiftUI

Sheets in SwiftUI explained with code examples

Sheets in SwiftUI allow you to present views that partly cover the underlying screen. You can present them using view ...

• 5 min read Nov 29, 2022 / SwiftUI

Alternate App Icon Configuration in Xcode

Adding alternate app icons to your app allows users to customize their home screen with an app icon that fits ...

• 5 min read Oct 11, 2022 / Swift SwiftUI

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Combine all the things

@Published risks and usage explained with code examples

@Published is one of the property wrappers in SwiftUI that allows us to trigger a view redraw whenever changes occur ...

• 4 min read Mar 01, 2022 / Combine SwiftUI

RunLoop.main vs DispatchQueue.main: The differences explained

RunLoop.main and DispatchQueue.main are often used as schedulers within Combine. During code reviews, I often encounter inconsistency in using one ...

• 3 min read Dec 07, 2021 / Combine

PassthroughSubject vs. CurrentValueSubject explained

PassthroughSubject and CurrentValueSubject are two types from the Combine framework that conforms to the Subject protocol. Both are very similar ...

• 4 min read Sep 07, 2021 / Combine

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Dive into Core Data

How to observe NSManagedObject changes in Core Data using Combine

Observing changes in Core Data NSManagedObject instances with Combine publishers can be a great solution to keep your user interface ...

• 3 min read Apr 20, 2021 / Combine Core Data

Data validation on insertion, update, and deletion in Core Data

Data validation in apps is important to make sure we save data conforming to the business rules. A name should ...

• 3 min read Nov 10, 2020 / Core Data

Derived Attributes to improve Core Data Fetch Performance

Derived attributes are available since iOS 13 and aim to improve fetch performance in many different scenarios. Although we have ...

• 3 min read Nov 03, 2020 / Core Data

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Be an expert on Xcode

RocketSim 9.0: Enhance your iOS Simulator

RocketSim is a developer tool that gives your iOS Simulator extra functionalities to increase day-to-day development productivity. Floating windows become ...

• 11 min read Jan 09, 2023 / Xcode