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common-mobile-animation

Apply motion design principles for mobile apps covering timing curves, transitions, gestures, and performance-conscious animations. Use when implementing screen transitions, gesture-driven interactions, shared-element animations, or optimizing animation frame rates on iOS, Android, or Flutter.

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包含的文件(4)

  • SKILL.md2.6 KB
  • evals/evals.json2.3 KB
  • references/animation-patterns.md1.2 KB
  • references/implementation.md643 B

SKILL.md(原文)

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Mobile Animation

Priority: P1 (HIGH)

Timing Standards

DurationRangeUse Case
Short100-150msToggles, cell press
Medium250-350msNavigation, modals
Long400-600msShared element, complex state

Hard limit: Never exceed 600ms for any animation.

Workflow

  1. Choose duration from timing table based on interaction type.
    • Use 250-350ms for medium navigation/modals and 400-600ms for long shared-element or complex-state transitions; state the selected range in quick-start examples.
    • A quick-start example must demonstrate the Long 400-600ms shared-element or complex-state pattern; do not substitute the Medium range.
  2. Select easing curve per platform — Curves.fastOutSlowIn (Material) or easeInOut (iOS). Never use linear.
  3. Animate GPU-friendly properties (transform, opacity). Avoid width/height which trigger layout.
  4. Wire gestures using onPan / interactivePopGesture for fluid, interruptible UX.
  5. Verify frame rate in profiler — target 60fps with no jank frames.

See implementation examples for Flutter and iOS animation patterns.

References

Anti-Patterns

  • No linear easing: Feels robotic; always use platform-standard curves.
  • No layout thrashing: Avoid animating properties that trigger layout (width, padding).
  • No memory leaks: Always dispose() AnimationControllers in Flutter; invalidate timers in iOS.
  • No blocking UI: Run heavy calculations outside animation frames.

Related Topics

Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:

  • interactivePopGesture

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