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Trees are an extraordinarily simple, extraordinarily useful data type, and in this article we’ll make a complete tree data type using Swift in just a few minutes. But rather than just stop there, we’re going to do something quite beautiful that I hope will blow your mind while teaching you something useful.
Phantom types are a powerful way to give the Swift compiler extra information about our code so that it can stop us from making mistakes. In this article I’m going to explain how they work and why you’d want them, as well as providing lots of hands-on examples you can try.
In this article you’ll learn how memoization can dramatically boost the performance of slow functions, and how easy Swift makes it thanks to its generics and closures.
In this article I’m going to walk you through building a
WaveView with SwiftUI, allowing us to create beautiful waveform-like effects to bring your user interface to life.
Just like UIKit before it, SwiftUI doesn’t come with built-in support for loading remote images, which makes it hard to get data from the internet. In this article I’ll show you how you can build a custom view that can fetch image from the internet, while also showing other images for different states.
Boxing allows us to wrap up a struct in a class, to make it easy to share in several places. I’ve touched on boxing briefly previously, but here I want to take the concept much further to add useful protocol conformances that really powerful up its usefulness.
Type erasure helps us solve difficult type system problems by purposefully discarding some information. In this article we’ll look at what the underlying problem is and how Swift solves it, and in the second part we’ll continue on to look at how we can build type erasure ourselves.
UserDefaults system lets us store small amounts of user data for our app, which might sound simple but it’s deceptively powerful. In this article I’ll show you the correct way to create initial preferences, how to share preferences across applications, how to synchronize data with iCloud, and why this is a case where property wrappers probably aren’t a good solution.
In this article I’m going to walk you through building a
LongPressButton with SwiftUI, which will requires users to press and hold for a second before it’s triggered.
When it comes to learning operator overloading, there is one operator that Swift lacks, that many other languages have, and is genuinely useful. In this article I’ll show you how to build the spaceship operator in Swift – it’s surprisingly easy, and useful too.
Arrays and sets have their own advantages and disadvantages, but what if we could combine them both to make an ordered set? We can! And in this article that’s exactly what we’ll do.
There are several times when you might want to flip between a
VStack, but one useful option is to look at the Dynamic Type size. Apple uses this itself to switch list rows to a vertical layout when using larger fonts, and in this tutorial I’ll show you how it’s done.
Particle systems let us create special effects such as confetti, fire, smoke, rain, and snow, all by adjusting a range of inputs. In this article we’re going to build our own particle system entirely driven by SwiftUI, so you can easily add some sparkle to your apps.
Although we mostly prefer JSON for data transfer, many major languages make it easy to parse and traverse XML documents. Swift does not, but that’s something we can fix in under a 100 lines of code by writing our own implementation of MiniDOM – Python’s lightweight implementation of the document object model.
Bezier paths let us draw all sorts of shapes efficiently and smoothly, and with a little work we can bring them into SwiftUI then animate them smooth, and in this article I’m going to walk you through making a very simple
ShapeView struct to do just that.
There are lots of UI mistakes we can make in programming, but unless our bugs actually get in the way of functionality most users don’t care that much. But there is one exception, and we’re going to look at it here: in this article I’ll show you how to handle names correctly – the most personal data of all.
It’s not hard to make a basic property wrapper, but if you want one that automatically updates the
body property like
@State you need to do some extra work. In this article I’ll show you exactly how it’s done, as we build a property wrapper capable of reading and writing documents from our app’s container.
Reading device motion and orientation is a fast and slightly magical way to incorporate the real world into your apps, and can do a huge amount to add a little spark of delight to your UI. In this article I’m going to show you how easy it is to control SwiftUI layouts using the accelerometer, and give you a few ideas for special effects.
Generics are one of the most powerful features of Swift, allowing us to write code once and reuse it in many ways. In this article we’ll explore how they work, why adding constraints actually helps us write more code, and how generics help solve one of the biggest problems in Swift.
Working with dates in software is hard, and if you don’t understand why then think about time zones, think about leap years, or think about how it’s the year 2563 in the Thai calendar. Apple gives us many tools for making them easier but they can be hard to discover, so in this article I’m going to try to provide some clear guidance for what to use and when.
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