Apple has taken a big step forward with their new SwiftUI framework for implementing user interfaces on the macOS and iOS platforms. We like that SwiftUI moves beyond the somewhat kludgy relationship between Interface Builder and Xcode and adopts a coherent, declarative and code-centric approach. You can now view your code and the resulting visual interface side by side in Xcode 11, making for a much better developer experience. The SwiftUI framework also draws inspiration from the React.js world that has dominated web development in recent years. Immutable values in view models and an asynchronous update mechanism make for a unified reactive programming model. This gives developers an entirely native alternative to similar reactive frameworks such as React Native or Flutter. SwiftUI definitely represents the future of Apple UI development, and although new, it has shown its benefits. We've been having great experience with it — and its shallow learning curve. It's worth noting that you should know your customer's use case before jumping into using SwiftUI, given that it doesn't support iOS 12 or below.