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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.
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.
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 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.
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.
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.
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.
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.
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.
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.
In this part we’re going to start by looking at storing app information in
UserDefaults, then move on to showing progress with
ProgressView, and finally loading and saving documents.
Checkpoint 2 of Swift for Complete Beginners asks you to print the number of items in a string array, then print the number of unique items. Let’s solve that now…
We’re going to upgrade our map with annotations, but first I want to give you the chance to implement grids in our Journeys app so you can see them in action with your own code.
So far our home view has simply been a host for adding test data, but that changes now: we’re going to make the home view a summary of all their project progress, plus the most important items coming up next.
String interpolation is easy, right? Wrong! String interpolation is actually a huge power feature in Swift, and we have a massive array of functionality on hand to help us customize it. In this article I’ll show you just how much control we have, and how to use that control to make your code easier to read.
Our app was designed to work in English, and although you might not want to change that your should at least be able to change. Let’s start with that…
Almost always, the key to getting a great app is getting a great data model – deciding as early as you can what data you want to store, and how each piece relates to other pieces. So, we’re going to dive straight into Core Data!
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…
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