Articles about Swift and iOS development

Cheat sheet on Combine operators for iOS development

Get an overview on Publisher operators in Combine.

Understanding date decoding strategies when working with JSON in Swift

Learn how to convert JSON dates to Swift's native Date type and vice versa.

Understanding different cache policies when working with URLRequest in Swift

Learn how to manage cache when sending HTTP requests in your iOS applications.

Using URLSession with async/await in Swift

Learn how to make HTTP networking requests with URLSession's async/await API.

Developer guide on the iOS file system

Learn how to work with files and directories when developing iOS applications.

Memory management for async/await and tasks in Swift

Learn about weak self references when working with the async/await API.

How to manage lifecycle events in SwiftUI iOS applications

Discover SwiftUI's lifecycle events onAppear(), onDisappear() and task().

iOS developer guide on the main aspects of Core Data

Understand the main concepts of the Core Data framework.

Memory management in Combine

Learn how to avoid retain cycles when using the Combine framework in Swift.

How to build a configurable widget with WidgetKit and SwiftUI

Learn how to allow users to customize their widgets.

Building widgets for iOS applications with WidgetKit and SwiftUI

Learn to create widgets to show your app's content on the home screen.

How to bridge async/await functions to Combine's Future type in Swift

Learn how to call async/await code within Combine based APIs.

Understanding SwiftUI's ViewThatFits container

Learn to build adaptive layouts with SwiftUI's ViewThatFits container.

Quick guide on the Grid container in SwiftUI

Understanding how to use the Grid layout introduced at WWDC22.

Understanding the some keyword when working with generic protocols in Swift 5.7

Learn about opaque parameter declarations introduced at WWDC22.

Getting started with UI testing for SwiftUI

Learn how to create user interface tests with the XCTest framework.

Customizing buttons in SwiftUI with the ButtonStyle protocol

Learn how to reuse button styles in SwiftUI.

Customizing the appearance of the NavigationView title in SwiftUI

Learn how to create a custom navigation bar title view in SwiftUI.

Quick guide on toolbars in SwiftUI

Learn how to add toolbar items to the bottom bar, the navigation bar, above the keyboard or in modal views with SwiftUI.

Quick guide on local notifications for iOS

Learn how to schedule local notifications in different ways and how to handle them.

Testing remote iOS push notifications in a simulator with simctl

Learn how to use the command-line tool simctl to simulate remote notifications in iOS.

Quick guide on home screen quick actions for iOS

Learn how to give users access to your app's functionality directly from the home screen.

Understanding the difference between AppDelegate, SceneDelegate and SwiftUI's App protocol

Learn about the life cycle of a SwiftUI application.

How to add text input actions to iOS push and local notifications

Learn how to define and handle a notification action that allows custom user text input.

How to add and handle actions for iOS push and local notifications

Learn about actionable notifications that allow users to respond without launching the app.

How to use async/await in synchronous Swift code with tasks

Learn how to use tasks to call async/await methods from synchronous code.

Working with Xcode configuration files

Learn how to manage different iOS build environments with .xcconfig files.

Managing different iOS build configurations in Xcode

Learn the possibilities to set up environments like debug, staging and release for your iOS app.

Understanding opaque types in Swift

Learn how to use opaque return types in Swift and SwiftUI.

SF Symbols guide for SwiftUI and UIKit

Learn how to use symbol images provided by Apple in iOS applications.

Quick guide on Local Authentication for iOS

Learn how to use biometric authentication like Face ID or Touch ID.

Symmetric-key cryptography with CryptoKit for iOS

Using CryptoKit to increase security in iOS applications.

Cryptographic hash functions in CryptoKit for iOS

Use cases of cryptographic hash functions and how to implement them in iOS.

Public-key cryptography with CryptoKit for iOS

Using CryptoKit to increase security in iOS applications.

How to position and size SpriteKit nodes

Learn how positioning and sizing works in SpriteKit

Creating a particles snow effect with SpriteKit and SwiftUI

In this Christmas special, we'll have some fun with snow particles.

How to use a Connectable publisher in Combine

Learn how to avoid data loss by using Combine's ConnectablePublisher.

Backpressure in Combine

Learn what backpressure is and how to apply it in Combine.

Dynamic colors in SwiftUI

Learn to use the asset catalog or the programmatic approach to define dynamic colors in SwiftUI.

Understanding actors in Swift

Learn how to use Swift actors to prevent data races when working with concurrency.

How to avoid using AnyView in SwiftUI

Boost SwiftUI performance by using AnyView alternatives.

How to unit test async/await functions in Swift

Learn how to write unit tests for async/await functions.

Quick guide on async/await in Swift

Learn how use async/await for asynchronous tasks.

How to call async/await functions concurrently in Swift

Learn how to call async/await functions in parallel with tasks.

Working with Strings in Swift

Learn how to use Swift's String type and its companions Character, Index and Substring.

Extending optionals in Swift

Quick tip on how to extend an optional in Swift

Understanding Swift Optionals

Learn about forced unwrapping, optional binding and implicit optionals. Understand how optionals work under the hood.

Quick Guide on Swift Package Manager for iOS

Learn how to use the Swift Package Manager with Xcode to add dependencies to your iOS project

How to add local Swift Packages to an iOS project

Learn how to add local dependencies to your iOS project by using Swift Package Manager and Xcode

How to add public libraries as Swift Packages to an iOS project

Learn how to add, update and delete remote dependencies using the Swift Package Manager and Xcode

The @FetchRequest property wrapper in SwiftUI

Learn how to request data from the Core Data store in a SwiftUI view

Quick guide to using Core Data with SwiftUI

Learn the basics for using the Core Data framework with SwiftUI in iOS

The @Environment property wrapper in SwiftUI

Learn how to share global data between SwiftUI views

Objective-C basics for Swift developers

Quick reference and cheatsheet for Swift developers learning Objective-C

iOS Interview Questions and Answers for Senior Developers Part 6 - Testing

Check your knowledge on automated tests in Swift and iOS

How to solve problems with bitwise operators in Swift

Learn to use the power of bitwise operations and option sets in iOS.

Quick guide on Combine essentials

Get started with Combine by reading this guide on basic Combine concepts and terms.

Quick guide on SwiftUI essentials

Get started with SwiftUI by reading this quick guide.

iOS Interview Questions and Answers for Senior Developers Part 5 - Architecture & Design Patterns

Check your knowledge on architecture and design patterns in Swift iOS

Explore Apple's new Swift logging API for iOS 14

Learn how to log events and errors in your iOS app with the new API introduced at WWDC 2020

iOS Interview Questions and Answers for Senior Developers Part 4 - Concurrency

Check your knowledge on threading concepts and concurrency in iOS

Safe array subscription in Swift

An extension to access array elements with conditional binding

GraphQL essentials you need to know as an iOS Developer

Master the networking concept behind GraphQL and their usage on iOS

Quick tip on adding child view controllers programmatically

An extension that calls all necessary methods for adding a child view controller

iOS Interview Questions and Answers for Senior Developers Part 3 - Persistence & Databases

Check your knowledge on database concepts and persistence in iOS

iOS Interview Questions and Answers for Senior Developers Part 2 - Networking

Check your knowledge on general computer networking concepts and networking in iOS

Introduction to Combine for iOS developers with RxSwift experience

How to start using Combine for reactive programming

iOS Interview Questions and Answers for Senior Developers Part 1 - Swift

Check your knowledge on Swift and programming language concepts