unity-ui-development
Unity UI Development
Overview
Unity provides two UI systems: UGUI (the established GameObject-based system) and UI Toolkit (the newer retained-mode system inspired by web technologies). This skill covers both systems, when to use each, and implementation patterns.
Choosing a UI System
| Factor | UGUI | UI Toolkit |
|---|---|---|
| Runtime UI | Mature, full-featured | Supported (Unity 2023+) |
| Editor UI | Not supported | Primary system for editor |
| World-space UI | Excellent (World Space Canvas) | Limited |
| Animation/Tweening | DOTween, Animator, LeanTween | USS transitions, C# manipulation |
| Styling | Per-element, manual | USS stylesheets (CSS-like) |
| Performance | Draw call heavy with many canvases | Retained mode, lighter draw calls |
| Learning curve | Lower for Unity devs | Higher (web-like paradigm) |
| VR/AR | Well-supported | Limited world-space support |
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