SwiftUI Layout & View Structure Reference Comprehensive guide to stack layouts, view composition, subview extraction, and layout best practices. Relative Layout Over Constants --- Context-Agnostic Views Views should work in any context. Never assume presentation style or screen size. --- Own Your Container Custom views should own static containers but not lazy/repeatable ones. --- View Structure Principles SwiftUI's diffing algorithm compares view hierarchies to determine what needs updating. Prefer Modifiers Over Conditional Views Use conditionals when you truly have different views : --- Ex…