ios-application-dev

A practical guide for building iOS applications using UIKit, SnapKit, and SwiftUI. Focuses on proven patterns and Apple platform conventions. Swift, SwiftUI, UIKit, SF Symbols, Metal, and Apple are trademarks of Apple Inc. SnapKit is a trademark of its respective owners. - Touch targets >= 44pt - Content within safe areas (SwiftUI respects by default, use .ignoresSafeArea() only for backgrounds) - Use 8pt spacing increments (8, 16, 24, 32, 40, 48) - Primary actions in thumb zone - Support all screen sizes (iPhone SE 375pt to Pro Max 430pt) - UIKit: preferredFont(forTextStyle:) + adjustsFontForContentSizeCategory = true - SwiftUI: semantic text styles .headline , .body , .caption - Custom fonts: UIFontMetrics / Font.custom(_:size:relativeTo:) - Adapt layout at accessibility sizes (minimum 11pt) - Use semantic system colors ( .systemBackground , .label , .primary , .secondary ) - Asset catalog variants for custom colors (Any/Dark Appearance) - No color-only information (pair with icons or text) - Contrast ratio >= 4.5:1 for normal text, 3:1 for large text - Labels on icon buttons ( .accessibilityLabel() ) - Reduce motion respected ( @Environment(\.accessibilityReduceMotion) ) - Logical reading order ( .accessibilitySortPriority() ) - Support Bold Text, Increase Contrast preferences - Tab bar (3-5 sections) stays visible during navigation - Back swipe works (never override system...