SwiftUI Architecture Patterns

Comprehensive guide to modern SwiftUI architecture, @Observable macro, state management, view composition, and the ongoing MV vs MVVM debate for iOS 26 development.

Prerequisites

• iOS 17+ for @Observable (iOS 26 recommended)
• Xcode 26+
• SwiftUI framework

The Architecture Debate: MV vs MVVM

The Modern Reality

With @Observable (iOS 17+), SwiftUI has evolved. The traditional MVVM pattern is not always necessary.

When to Use MV (Model-View)