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While I’m sure you’re keen to get started programming immediately, please give me a few minutes to outline the goals of this course and explain why it’s different from other courses I’ve written.
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.
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.
Before you dive in to the first article in this course, I want to give you a brief overview of our goals, how the content is structured, as well as a rough idea of what you can expect to find.
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.
It is my firm belief that every iOS app should be usable to everyone, and putting in the work to make your app function well no matter who is using it says a lot about the kind of developer you are.
Swift’s optionals are implemented as simple enums, with just a little compiler magic sprinkled around as syntactic sugar. However, they do much more than people realize, and in this article I’m going to demonstrate some of their power features that can really help you write better code – and blow your mind along the way.
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.
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.
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.
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.
SwiftUI gives us a modifier to make simple shadows, but if you want something more advanced such as inner shadows or glows, you need to do extra work. In this article I’ll show you how to get both those effects and more in a customizable, flexible way.
The flood fill approach to path finding is one of the easiest to learn, works great in games with small maps, and is also commonly used in software – filling a picture with color, for example. In this article I’ll walk you through how the algorithm works, and help you build a visual representation of it in action.
In this article we’re going to look at the
compactMap() function, which is a more advanced form of
map() that adds an important second step to handle optional results. Please make sure you’ve already gone through my tutorial on
map() before continuing here!
Checkpoint 6 of Swift for Complete Beginners asks you to create a struct to model a car, adding properties and methods that make sense. Let’s solve that now…
Instruments is a powerful tool for identifying performance problems, but in this article I’ll show you how to find code that slows down rendering in your app, causing slow scrolling, wasted CPU time, and more – all through the simulator.
Checkpoint 1 of Swift for Complete Beginners asks you to create an Xcode playground able to convert any value of Celsius into Fahrenheit, then print the result. Let’s solve that now…
In this introduction we go through the core language improvements in Swift 5.3, including multiple trailing closures, type-based program entry points, and more, before moving on to the first new SwiftUI feature: lazy stacks.
In this article we’re going to build a tool that designs particle systems for SwiftUI apps, all built on top of the
Canvas that were added in SwiftUI. I think you’ll really be amazed how fast this comes together!
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.
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