Apple HIG: Navigation Components

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Key Principles

Search: discoverable with instant feedback. Choose placement per platform and context, including bottom search/tab affordances on iOS. Show results as the user types when feasible, with debounce/cancellation for remote searches.
Page controls: position in a flat page sequence. For discrete, equally weighted pages (onboarding, photo gallery). Show current page and total count.
Path controls: file hierarchy navigation. macOS path controls display location within a directory structure and allow jumping to any ancestor.
Search scopes narrow large result sets. Consider scope controls when categories are clear; default to a broad scope and avoid unnecessary controls.
Clear empty states for search. Helpful message suggesting corrections or alternatives, not a blank screen.
Page controls are not for hierarchical navigation. Flat, linear sequences only. Use a navigation stack, sidebar or split view for hierarchy; tab bars also represent peer destinations.
Keep path controls concise. Show meaningful segments only. Users can click any segment to navigate directly.