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Simulator extra features

A weekly Swift Blog on Xcode and iOS Development

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Recent Posts

Deadlocks in Swift explained: detecting and solving

Deadlocks in Swift can make your app hang, causing a frustrating situation for both you and your users. Your app ...
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/ DebuggingSwift

Variable WidgetBundle configuration based on conditions

The WidgetBundle protocol inside WidgetKit allows you to configure supported widgets for your apps. Whenever you add one or more ...
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/ SwiftUI

Accessibility in SwiftUI explained for UIKit developers

Adding accessibility support in SwiftUI will be more approachable for you compared to UIKit. But still, if you’ve been sharpening ...
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/ SwiftUI

Swift Keywords

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

actor associatedtype async @autoclosure available await break catch class continue defer @discardableResult @dynamicMemberLookup enum @escaping fileprivate for @globalActor guard infix isolated lazy @MainActor nonisolated optional postfix @propertyWrapper private protocol required @resultBuilder rethrows sendable some struct subscript throw throws try typealias @unchecked @unknown unowned weak where while

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Learn more about Swift

Deadlocks in Swift explained: detecting and solving

Deadlocks in Swift can make your app hang, causing a frustrating situation for both you and your users. Your app ...
/ DebuggingSwift

Shared with You implementation and testing explained

iOS 16 introduced Shared with You allowing you to showcase content shared in Messages inside your app. Users can find ...
/ Swift

Sendable and @Sendable closures explained with code examples

Sendable and @Sendable are part of the concurrency changes that arrived in Swift 5.5 and address a challenging problem of ...
/ ConcurrencySwift

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Learn SwiftUI

Variable WidgetBundle configuration based on conditions

The WidgetBundle protocol inside WidgetKit allows you to configure supported widgets for your apps. Whenever you add one or more ...
/ SwiftUI

Accessibility in SwiftUI explained for UIKit developers

Adding accessibility support in SwiftUI will be more approachable for you compared to UIKit. But still, if you’ve been sharpening ...
/ SwiftUI

VoiceOver navigation improvement tips for SwiftUI apps

VoiceOver navigation support in your apps comes with the same requirements as navigating through touch controls. When navigating apps with ...
/ 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 ...
/ CombineSwiftUI

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 ...
/ 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 ...
/ 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 ...
/ CombineCore 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 ...
/ 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 ...
/ Core Data

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Be an expert on Xcode

Faster StoreKit testing by syncing in-app purchase products

StoreKit testing in the Simulator allows you to speed up testing in-app purchases for your app. You can test in-app ...
/ Xcode

App Icon Generator is no longer needed with Xcode 14

An App Icon Generator generates all required app icon sizes based on a single-size icon input file. Creating and dragging ...
/ OptimizationXcode

RocketSim 8.0: 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 ...
/ Xcode

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Get better at debugging

Deadlocks in Swift explained: detecting and solving

Deadlocks in Swift can make your app hang, causing a frustrating situation for both you and your users. Your app ...
/ DebuggingSwift

Debugging SwiftUI views: what caused that change?

Debugging SwiftUI views is an essential skill to own when writing dynamic views with several redrawing triggers. Property wrappers like ...
/ DebuggingSwiftUI

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 ...
/ Debugging

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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 ...
/ 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 ...
/ DebuggingWorkflow

Full-screen development with Xcode and the Simulator

While developing apps it's important to create focus to get in your flow and speed up development. Full-screen mode can ...
/ Workflow

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Optimize yourself and improve

App Icon Generator is no longer needed with Xcode 14

An App Icon Generator generates all required app icon sizes based on a single-size icon input file. Creating and dragging ...
/ OptimizationXcode

Increase App Ratings by using SKStoreReviewController

SKStoreReviewController allows asking your users for App Store ratings from within the app. Positive ratings can help your app stand ...
/ OptimizationSwift

Writing Swift Articles: Tips to become a better writer

Writing Swift articles is a great way to become a better engineer and is often seen as a required skill ...
/ Optimization