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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.
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.
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.
Getting ready for a job interview is tough work, so I’ve prepared a whole bunch of common questions and answers to help give you a jump start. But before you get into them, let me explain the plan in more detail…
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.
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.
In this article we’re going to look at the map()
function, which transforms one thing into another thing. Along the way we’ll also be exploring some core concepts of functional programming, so if you read no other articles in this course at least read this one!
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.
Assertions allow us to have Swift silently check the state of our program at runtime, but if you want to get them right you need to understand some intricacies. In this article I’ll walk you through the five ways we can make assertions in Swift, and provide clear advice on which to use and when.
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.
UPDATED: 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 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.
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.
The second part of cleaning up CloudKit involves tackling error handling head on, and along the way I’ll show you a useful trick for making this process easier. I’ve said it before, but it bears repeating that getting error handling right is the key to a great CloudKit app!
A great answer should introduce property wrappers, then explain what @Published
does, give some examples, compare it against @State
, then bring in any extra real-world knowledge you can add around nuances or complexities.
Few things in SwiftUI are quite so easy and yet quite so rewarding as rebuilding Apple’s welcome screens. In this article we’ll do just that, making it flexible enough to adapt easily for your own apps.
SwiftUI’s 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.
JSON is one of the most common file formats we deal with, so we can write a little macOS utility to make it nicer to work with – compressing the data, formatting the data, and even sorting the key names.
Anyone with even a modicum of SwiftUI experience can name things like @State
and @ObservedObject
, but this question specifically asks you not to mention the built-in ones so this is more about thinking what property wrappers actually add to our projects.
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