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SF Symbol: How to for Swift & SwiftUI
Apple introduced SF Symbols during WWDC 2019 as a big present for developers, as they're straightforward and free to use ...
Enum explained in-depth with code examples in Swift
Enum usage in Swift: If case, guard case, fallthrough, associated values, and the CaseIteratable protocol. These terms could sound familiar if ...
Black Friday: 50% discount on RocketSim & Going Indie Course
It's that time of year when once-a-year discounts are offered on all kinds of products, including RocketSim and my Going ...
Catch unexpected UI changes inside Pull RequestsUse your existing snapshot tests and store images with Screenshotbot to get notified inside pull-requests when a snapshot changes. Get started for free.
Swift Keywords
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Learn more about Swift
SF Symbol: How to for Swift & SwiftUI
Apple introduced SF Symbols during WWDC 2019 as a big present for developers, as they're straightforward and free to use ...
Enum explained in-depth with code examples in Swift
Enum usage in Swift: If case, guard case, fallthrough, associated values, and the CaseIteratable protocol. These terms could sound familiar if ...
MainActor usage in Swift explained to dispatch to the main thread
MainActor is a new attribute introduced in Swift 5.5 as a global actor providing an executor that performs its tasks ...
Learn SwiftUI
@Entry macro: Creating custom environment values in SwiftUI
The @Entry macro in SwiftUI allows you to define custom environment values without writing boilerplate code. While introduced in Xcode ...
Memory consumption when loading UIImage from disk
Memory consumption can quickly increase if you load many images from the disk using UIImage. You'll generally load images from ...
Why macOS Development is Perfect for Indie Developers
Building apps for macOS offers developers a fantastic opportunity to expand their skills, create useful utilities to solve their problems, ...
Build Apps Faster using RocketSim
Recommend by Apple as an “Essential Tool for Developers”, RocketSim helps thousands of engineers to save hours per week. Discover these articles and learn how you can leverage RocketSim to improve your workflow:
App Actions
- Inspect network traffic using the Xcode Simulator
- Universal Links implementation on iOS
- Deeplink URL handling in SwiftUI
- Location Simulation in Xcode’s Simulator
- Optimizing your app for Network Reachability
- Testing push notifications on the iOS simulator
App Actions Perform Menu
- Localization testing in Xcode
- User Defaults reading and writing in Swift
- Xcode Simulator Directories Exploration
RocketSim Tools
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 ...
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 ...
PassthroughSubject vs. CurrentValueSubject explained
PassthroughSubject and CurrentValueSubject are two types from the Combine framework that conforms to the Subject protocol. Both are very similar ...
Screenshotbot: Scale up your snapshot tests, without the frictionSpending too much time maintaining snapshot tests? Screenshotbot works with your existing snapshot tests and stores your images. Say goodbye to Git LFS. Screenshotbot notifies you on pull-requests when snapshots change. Curious? Try out Screenshotbot!
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 ...
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 ...
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 ...
Be an expert on Xcode
Inspect network traffic using the Xcode Simulator
Inspecting network traffic is an essential skill for app developers. Several tools allow you to monitor requests going in and ...
Xcode Build Insights: Keep track of project compilation times
Xcode Build Insights lets you keep track of compilation times to ensure your project doesn't suddenly become slow to build ...
Solve Missing API declaration using required reason (ITMS-91053)
Apps submitted to the App Store must define API declarations using the required reasons. Apps that don't will be rejected ...
Get better at debugging
Memory consumption when loading UIImage from disk
Memory consumption can quickly increase if you load many images from the disk using UIImage. You'll generally load images from ...
Debugging SwiftUI views: what caused that change?
Debugging SwiftUI views is an essential skill when writing dynamic views with several redrawing triggers. Property wrappers like @State and ...
OSLog and Unified logging as recommended by Apple
OSLog is a replacement for print, and NSLog and Apple's recommended way of logging. It has different logging levels, like ...
Improve your workflow
Designing Apps: 5 Methods to improve your workflow
Designing apps can be challenging if you don't have a design background. Many of you who read my blog are ...
Test-Driven Development (TDD) for bug fixes in Swift
Test-driven development (TDD) is a technique that requires you first to write a failing test before you start implementing a ...
Third-party libraries acknowledgments using a Settings bundle
Third-party libraries help developers build apps faster but often come with a license. The MIT license is likely the most ...
Optimize yourself and improve
Contingent pricing for in-app subscriptions
Contingent pricing for in-app subscriptions creates a new way to retain and attract customers by providing discounted subscription prices to ...
App onboarding funnel optimization to increase conversions
An app onboarding can be seen as a funnel full of steps toward the key action of your application. A ...
App design: 5 benefits of using system components
Building custom elements and ignoring the sometimes boring system components during app design can be appealing. However, these boring elements ...
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Most Popular Posts
- SF Symbol: How to for Swift & SwiftUI
- MainActor usage in Swift explained to dispatch to the main thread
- Async await in Swift explained with code examples
- Sendable and @Sendable closures explained with code examples
- Nonisolated and isolated keywords: Understanding Actor isolation