A weekly Swift Blog on Xcode and iOS Development

Swift Keywords

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Learn more about Swift

Race condition vs. Data Race: the differences explained

Race conditions and data races are similar but have a few significant differences you should know. Both terms are often ...

• 5 min read Sep 21, 2021 / Swift

Thread Sanitizer explained: Data Races in Swift

The Thread Sanitizer, also known as TSan, is an LLVM based tool to audit threading issues in your Swift and ...

• 5 min read Sep 14, 2021 / Swift Xcode

@AppStorage explained and replicated for a better alternative

The @AppStorage Property Wrapper was introduced in SwiftUI to allow easy access to the user defaults. When property wrappers were ...

• 6 min read Aug 24, 2021 / Swift

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Learn SwiftUI

How to create a Conditional View Modifier in SwiftUI

Conditional View Modifier creation in SwiftUI allows you only to apply modifiers if a certain condition is true. Whether it's ...

• 4 min read Apr 13, 2021 / SwiftUI

How to create a Dynamic Pager View for onboardings

A pager view in SwiftUI like we know UIPageViewController in UIKit didn't exist until iOS 14 and macOS 11.0. Using ...

• 6 min read Mar 02, 2021 / SwiftUI

Getting started with UIKit in SwiftUI and vice versa

SwiftUI can work together with UIKit by making it easier to add SwiftUI views to UIKit and visa versa using ...

• 6 min read Dec 28, 2020 / SwiftUI

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Combine all the things

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

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

Getting started with the Combine framework in Swift

Combine was introduced as a new framework by Apple at WWDC 2019. The framework provides a declarative Swift API for ...

• 9 min read Apr 06, 2021 / Combine Swift

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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

Thread Sanitizer explained: Data Races in Swift

The Thread Sanitizer, also known as TSan, is an LLVM based tool to audit threading issues in your Swift and ...

• 5 min read Sep 14, 2021 / Swift Xcode

Development Assets in Xcode to enrich SwiftUI Previews

Development Assets in Xcode allow you to provide test data to use within SwiftUI previews and other code during development ...

• 4 min read Jul 27, 2021 / Xcode

Xcode Mark Line to improve readability using // Mark: comments

Xcode Mark Lines allows us to create a better overview of sections within our classes or structs. A so-called mark ...

• 4 min read Dec 08, 2020 / Xcode

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Get better at debugging

Flaky tests resolving using Test Repetitions in Xcode

Flaky tests can be frustrating to deal with. You're ready to open your PR until you realize your tests fail ...

• 5 min read Jun 22, 2021 / Debugging

OSLog and Unified logging as recommended by Apple

OSLog as a replacement of print and NSLog is the recommended way of logging by Apple. It's a bit harder ...

• 6 min read Jul 20, 2020 / Debugging Workflow

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 ...

• 5 min read May 05, 2020 / Debugging Swift

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Improve your workflow

Picking your minimum iOS version to support

When a new iOS version arrives, it's oftentimes a moment to reflect on the supported iOS versions and see to ...

• 6 min read Aug 31, 2021 / Workflow

RocketSim 4.0: Compare designs & record the Simulator with Touches

RocketSim 4.0 is available as of today and comes with a few major new features. Designs from Sketch and Figma ...

• 2 min read Mar 16, 2021 / Workflow

OSLog and Unified logging as recommended by Apple

OSLog as a replacement of print and NSLog is the recommended way of logging by Apple. It's a bit harder ...

• 6 min read Jul 20, 2020 / Debugging Workflow

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Swift Keywords

Learn more about Swift

Learn SwiftUI

Combine all the things

Dive into Core Data

Be an expert on Xcode

Get better at debugging

Improve your workflow

Optimize yourself and improve