SwiftUI isn't the future of Apple development. It's the present. And that changes everything.
What SwiftUI is, why its declarative model matters, and why it's been the foundation of the AC Academy curriculum from day one.
In 2014, Apple introduced Swift. It was a big moment: a modern, safe, fast language designed to gradually replace Objective-C. The industry adopted it. It was the obvious choice.
In 2019, Apple introduced SwiftUI. That second announcement was, in my view, more important than the first. And it took a lot longer to be understood.
What SwiftUI is and why the way it works matters
SwiftUI is a framework for building user interfaces declaratively. That needs some explaining, because “declarative” is one of those words the tech industry uses all the time without stopping to explain what it means in practice.
The previous model, UIKit, was imperative: you described the how. You created the interface elements, placed them on screen, and defined what happened to them when the app's state changed. The code was a sequence of instructions the system executed in order. It works. It's powerful. And it gets complicated fast when the interface has many possible states.
SwiftUI flips the model. You describe the what: how the interface should look given a particular state of the data. The framework takes care of working out what changed and updating the screen efficiently. When the data changes, the view is recomputed. You don't have to manage the transition by hand.
The result is code that's considerably shorter, more readable and easier to maintain. A screen that took a hundred lines of code in UIKit can be expressed in twenty in SwiftUI. Not as a trick of syntactic compression, but because the declarative model eliminates entire categories of state-management code that UIKit required.
Truly multiplatform, within the Apple ecosystem
There's something about SwiftUI that introductory articles rarely mention, and it has huge implications for any developer or company that wants to be on more than one Apple platform.
The same SwiftUI code runs on iPhone, iPad, Mac, Apple Watch and Apple TV. Not with minor modifications: the same codebase, adapting intelligently to the conventions and capabilities of each device. Differences between platforms are handled with platform-specific modifiers where needed, but the core interface logic is written once.
That's real multiplatform: within the Apple ecosystem, with no performance trade-offs and full access to every platform's APIs. Very different from the promise of cross-platform development that includes Android, where “the same code” means an abstraction layer with its well-known limitations.
Why SwiftUI is the foundation of the AC Academy curriculum
When Apple introduced SwiftUI in 2019, we made a teaching decision that not everyone in the industry shared at the time: teach SwiftUI as the foundation, not as an add-on to UIKit.
The reasoning was simple. UIKit has decades of code in production and will stay relevant for years, especially for apps with very specific requirements. But SwiftUI is where Apple has been investing since 2019. Every WWDC expands what it can do. Xcode's tools are increasingly optimized for it. Apple's new frameworks assume you're using SwiftUI.
Teaching someone iOS development today by starting with UIKit is like teaching photography by starting with 35mm film: perfectly valid for understanding the principles, completely disconnected from where the real work is.
The students who've gone through our programs learn SwiftUI from day one. When they need to understand UIKit for a specific project or to work with legacy code, they have the conceptual foundation to do it. The reverse doesn't always work as well.
SwiftUI in 2026: where things stand
In 2026, SwiftUI is no longer the promising future it was in 2019. It's the current standard. New apps built for the Apple ecosystem are built with SwiftUI unless there's a very specific technical reason not to. Existing UIKit apps are being migrated gradually.
There are still areas where SwiftUI has limitations compared to UIKit for very specific use cases. There are fewer every year, and every WWDC closes some of them. The trajectory is clear.
If you're learning to develop for Apple platforms right now, SwiftUI isn't one option among many. It's the starting point.