Apple HIG: Status Components

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Key Principles

Progress Indicators

1. Show progress for operations longer than a second or two.

2. Determinate when duration/percentage is known. A filling progress bar gives users a clear sense of remaining work. Use for downloads, uploads, or any measurable process.

3. Indeterminate when duration is unknown. A spinner communicates work is happening without promising a timeframe. Use for unpredictable network requests.

4. Prefer progress bars over spinners. Determinate progress feels faster and more trustworthy.

5. Place indicators where content will appear. Inline progress near the content area, not modal or distant.

6. Don't stack multiple indicators. Aggregate simultaneous operations into one representation or show the most relevant.

Status Bars

7. Don't hide the status bar without good reason. Reserve hiding for immersive experiences (full-screen media, games, AR).

8. Match status bar style to your content. Light or dark for adequate contrast.

9. Respect safe areas. No interactive content behind the status bar.

10. Restore promptly when exiting immersive contexts.

Activity Rings

11. Activity rings are for Move, Exercise, and Stand goals. Don't repurpose the ring metaphor for unrelated data.

12. Respect ring color conventions. Red (Move), green (Exercise), blue (Stand) are strongly associated with Apple Fitness.

13. Use HealthKit APIs for activity data rather than manual tracking.

14. Celebrate completions with animation and haptics when rings close.

Reference Index

Output Format

1. Indicator type recommendation with rationale (determinate vs indeterminate).
2. Timing and animation guidance -- duration thresholds, animation style, transitions.
3. Accessibility -- VoiceOver progress announcements, live region updates.
4. Platform-specific behavior across targeted platforms.

Questions to Ask

1. Is the duration known or unknown?
2. Which platforms?
3. How long does the operation typically take?
4. System-level or in-app indicator?

Related Skills

• hig-components-system -- Widgets and complications displaying progress or status
• hig-inputs -- Gestures triggering progress states (pull-to-refresh)
• hig-technologies -- HealthKit for activity ring data; VoiceOver for progress announcements

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When to Use

This skill is applicable to execute the workflow or actions described in the overview.