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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.
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.
Anyone can write Swift code to fetch network data, but much harder is knowing how to write code to do it respectfully. In this article we’ll look at building a considerate network stack, taking into account the user’s connection, preferences, and more.
Instruments gives us a range of tools for finding performance problems, and in this article we’ll be looking at how the Time Profiler instrument can point out problems in seconds.
Button view is actually capable of doing remarkable things if you take the time to customize it. In this video I’ll be walking you through the
ButtonStyle protocol, showing you how we can use it to make great-looking and reusable button effects.
Previously we looked at how to create basic button styles that unify your app’s styling efficiently. In this follow-on article we’re going to explore three completely different button styles that show off just what SwiftUI is capable of: glossy marble buttons, classic fantasy buttons, and sci-fi buttons.
We already looked at how to fetch decodable data using Combine, and also how to fetch and merge multiple sources of data. In this article we’ll tackle something even more complex: creating chained network requests, where the information retrieved from one request must be used to create multiple other requests.
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.
Labels are one of the simplest views in SwiftUI, but that doesn’t mean there isn’t a lot to explore. In this video I’ll walk you through how to build custom label styles, including adding animation effects triggered by hovering with the iOS trackpad.
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.
In this article we’re going to look at how easy it is to rebuild the iOS lock screen. Yes, this isn’t hard, but along the way I think you’ll pick up a few cool SwiftUI tricks, including better date formatting, haptic buttons, and more.
ButtonStyle lets us focus on how our buttons look, but not how they work, which in many situations is valuable. In this article we’ll look at a more advanced protocol,
PrimitiveButtonStyle, and see how that gives us complete control over button functionality.
Most of the time the built-in iOS controls are great, but sometimes you want something just a little different. In this article I’m going to walk you through how you can take complete control over the way toggle switches work in SwiftUI, providing custom rendering and interactions.
Optionals are one of Swift’s most powerful features, letting us write code that is guaranteed to be safe as long as we check and unwrap them carefully. However, more often than not I prefer to avoid optionals as often as possible, and in this article I’ll outline some approaches for doing so.
In the first part of this tutorial we looked at the underlying problem that type erasure is trying to solve, and tried out Swift’s approach using
AnySequence. In this second part we’re going to adapt Swift’s own solution to get real type erasure for our own code.
ProgressView gives us control over showing determinate or indeterminate progress, but it’s a bit dull – just a thin line and an activity spinner. Fortunately, we also get the
ProgressViewStyle protocol so we can build entirely custom progress views, and in this article I’ll show you how it’s done.
Bar charts are one of the simplest and most common ways of representing data visually, and are often taught to kids at a young age. In this article I’ll show you how easy it is to render bar charts in SwiftUI, and show you various customization options to bring those charts to life.
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