Why using black backgrounds for your true-dark theme is a bad idea

In this tutorial, you’ll learn how ARC works and how to code in Swift for optimal memory management. You’ll learn what reference cycles are, how to use the Xcode 10 visual debugger to discover them when they happen and how to break them using an example of…

We have been working on multiple projects that required drawing 2D line graphs given a set of points. UIKit gives us the versatile UIBezierPath, which allows us to create a straight line graph by appending segments using addLineToPath for each point in our…

In this tutorial, you’ll learn how to manipulate CALayer properties on views in order to create a cool 3D sidebar animation.

There aren’t many resources regarding Audio Unit Extensions out there. There’s one Apple’s sample project, some info and WWDC talk about…

There's a great little library that will generate classes for accessing your resources... Learn how to make type-safe resources with SwiftGen.

View controllers tend to play a very central part in the apps we build. This week, let’s take a look at a technique that lets us reduce the size of our view controllers by extracting their core actions, without having to introduce any additional abstractions…

How do you tell if a string is empty in Swift? That depends on what you mean by “empty”. You might mean a string with zero length, or maybe also an optional string that is nil. What about a “blank” string that only contains whitespace. Let’s see how to test…

Calculating diffs in Swift just got a whole lot easier.

One place information for all the events, across the globe

This week, let’s take a look at how well the new 3.0 version of the Swift Playgrounds app for iPad walks the balance between simplicity and power, and how some of its new features really improves the ways it can be used as a highly portable, advanced Swift…

One of my biggest concerns as a developer is how a project is structured. Defining a good and clean architecture with helpful names and nice design patterns is very important. It helps you and other developers to easily understand how different components…

Have you found yourself stuck trying to make sense of a framework or library and wished you could see the source code? Apple does not share the source for UIKit but if the method you are struggling to understand is part of the Swift standard library you are…

Core Data has been in iOS and macOS going back as far as anyone can recall. Nonetheless, there is no widely adopted strategy of storing images and videos in Core Data. In this article let's implement and benchmark most popular Core Data persistence strategies…

Most of our apps are REST clients for some backends. During the development of this kind of apps, we want to keep it working offline. In this case, we have to cache data somewhere locally on the device to make it readable without an internet connection.

I have tried sending push notification to the app running on iPhone and it was sent successfully. But when I upload the app to Testflight for testing, no push notification is shown! Ever encounter the situation above? The reason why the push notification…

Learn the Swift Standard Library analyzing its source code.

A beautiful animation will improve the UX of your app. In this tutorial, we will teach you how to create interactive animation with UIViewPropertyAnimator.

Calculating diffs in Swift just got a whole lot easier.

One of Swift’s greatest features, and one of my favorites, are enums with associated values. The language itself uses them for its fundamentals, like Optional<T>, which either has a .some(T) or is .none. Another example is the new since Swift 5 Result<T,…