Comparison
SwiftUI vs UIKit: building iOS interfaces
Apple's modern declarative framework vs the battle-tested imperative one. Here's how they compare for real projects.
SwiftUI
Apple's modern declarative UI framework. Build interfaces with Swift code using a state-driven approach.
UIKit
Apple's original UI framework for iOS. Imperative, mature, with decades of documentation and solutions.
| Feature | SwiftUI | UIKit |
|---|---|---|
| Development Speed | Fast — less code, live previews | Slower — more boilerplate |
| Learning Curve | Moderate — new paradigm | Steeper — larger API surface |
| Maturity | Improving — some gaps remain | Mature — battle-tested |
| Customization | Growing — can drop to UIKit | Extensive — full control |
| Animation | Easy, declarative | Powerful but verbose |
| iOS Version Support | iOS 15+ for most features | All iOS versions |
| Navigation | Improving (NavigationStack) | Mature (UINavigationController) |
| Community Resources | Growing rapidly | Extensive, decades of content |
When to choose each
Choose SwiftUI
Choose SwiftUI for new projects targeting iOS 16+, when development speed matters, and when you want the best developer experience with live previews.
Choose UIKit
Choose UIKit when you need iOS 14 support, have complex custom UI requirements, or need specific UIKit-only features that SwiftUI hasn't adopted yet.
Our verdict
We use SwiftUI as our primary framework for new iOS projects, with UIKit integration for edge cases. The productivity gains from declarative UI, live previews, and less code are significant. For most new apps, SwiftUI is the right choice.
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