Moving between screens.
WHAT MODERN NAVIGATION PROVIDES
A stack driven by state, rather than by imperative pushing.
WHY THAT MATTERS
The navigation state can be saved, restored and driven by links or notifications.
WHAT THAT ENABLES
Deep linking, and restoring where the user was.
WHAT TO MODEL
The navigation path as data.
WHAT PRESENTATION OPTIONS EXIST
Sheets, for tasks Full-screen covers, for immersive tasks Alerts, for decisions Confirmation prompts, for destructive actions
WHAT TO USE ALERTS FOR
Decisions requiring the user's attention, sparingly.
WHY SPARINGLY
They interrupt everything.
WHAT TO HANDLE
Dismissal by gesture, which users perform mid-task.
WHAT TO DO ABOUT UNSAVED WORK
Confirm before discarding.
WHAT TO TEST
Entering every screen directly by link Returning after the application was terminated Rapid navigation
WHAT TO AVOID
Presenting from a view that may disappear Several presentations competing
