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Imagine building a house where every room is designed by a different architect, each using their own unique blueprint. Now, imagine trying to make all those rooms feel like they belong to the same home. This is the challenge Airbnb faced with its iOS app, where multiple UI frameworks and legacy codebases created inconsistency and inefficiency. Enter SwiftUI , Apple’s declarative UI framework, which promised to streamline development and unify the user experience. In this blog post, we’ll explore how Airbnb embraced SwiftUI, the technical challenges they overcame, and the lessons they learned along the way. Whether you’re an iOS developer, a product manager, or a tech enthusiast, this deep dive will provide valuable insights into modern UI development. Why SwiftUI? SwiftUI, introduced by Apple in 2019, is a declarative framework for building user interfaces across Apple platforms. Unlike UIKit, which uses an imperative approach, SwiftUI allows developers to describe wh...

How Airbnb's Epoxy Framework Solved Our Biggest iOS UI Headaches (And How You Can Use It Too) If you've ever built a complex iOS interface with UIKit, you know the pain. Massive view controllers. Endless delegate methods. State management spaghetti code. By 2018, Airbnb's iOS codebase was drowning in these problems - until they built Epoxy , a declarative UI framework that completely changed their approach to iOS development. The difference between traditional UIKit and Epoxy - less code, fewer bugs Why UIKit Was Failing Airbnb Airbnb's app had grown into one of the most complex iOS codebases in the world: 300+ unique screen types 5,000+ UI components 40+ engineers committing daily The traditional UIKit approach was crumbling under this scale: The 5 Worst UIKit Pain Points View controllers with 3,000+ lines of UI code Crash-prone manual diffing in tables/collections State spread across 10+ properties per screen Brittle inherita...