Study advanced Swift memory management with this tutorial. We'll discuss how Swift compiler implements automatic reference counting (ARC), the mechanism of weak referencing with side tables, the life cycle of Swift objects and the difference between strong…

Shake it off, shake it off

This week I want to continue the topic of using a Redux-like state container in SwiftUI. I’m delighted with the new approach and already finished the refactoring of the NapBot app in this way. That’s why today I want to share with you how I use Container…

Protocols are, without a doubt, a major part of Swift’s overall design. However, they also come with their own set of downsides and trade-offs. This week, let’s take a look at some of those characteristics, and explore a few alternative ways of abstracting…

Implementing backward compatible Dark Mode on iOS

Let’s play around with SwiftUI and learning more about how it works on the WatchOS environment. And see how to create some sort of “wavy” animation.

I have been interested in analytics tools for a while, especially when it’s applied to mobile development. Over the time, I saw many code mistakes when implementing an analytical solution. Some of them can be easily avoided when developer got the right insights…

Anyone who’s ever written an iOS app has come in contact with the delegate pattern. It’s a great pattern and fills an important role in iOS development.
However, sometimes when you’re writing your own custom classes it can feel like a bunch of boilerplate…

In this HEIC image compression tutorial, you’ll learn how to transform images into HEIC and JPEG formats, comparing their efficiency for optimum performance.

iOS 13 does bring a lot of exciting feature like Dark mode, Multi-tasking, Sign in with Apple etc. Other than exciting feature, iOS 13 SDK also bring some breaking changes as well, overlooking these changes might cause your app to behave differently as expected…

The release of Swift 5.1 brought some useful polish to the language with minimal source breaking changes. Some of the bigger improvements like property wrappers and ordered collection diffing take some time to get your head around. Luckily there are also…

SwiftNIO is Apple non-blocking networking library. It can be used to write either client libraries or server frameworks and works on macOS, iOS and Linux.

Let's study different ways of error handling in Swift: Optional, Result, Throw-Try-Catch, Assert, Precondition and FatalError. We'll categorize Swift errors by their severity level, compare assertion vs precondition and explain when to use each mechanism…

Framing your App Store screenshots greatly improves your store listing. But doing it manually takes hours away from perfecting your app. Instead, here’s how you automate the process of adding…

Written by: Steven Chung, Senior iOS Engineer | Revenue Team

Over time, any code base grows along with the project evolves and matures. It creates two main constraints for developers: how to have a code well organized while keeping a build time as low as possible. Let’s see how a modular architecture can fix that.

A common annoyance using iOS share sheets that just opening them will lock up the UI before showing options. UIActivityItemProvider is the solution.

Learn to implement basic cryptography with CryptoKit in Swift.