iOS Liquid Glass Reference

API reference for the Liquid Glass design system (iOS 26+): glass effects, containers, morphing transitions, and related system behaviors. This documents what the system provides — design direction is yours.

When to Use

• Implementing glass materials, glassEffect modifiers, or GlassEffectContainer
• Navigation surfaces that use system glass (tabs, toolbars, sheets)
• Checking how glass adapts to accessibility settings
• Creating app icons with Icon Composer

Apple's Stated Design Principles

Apple describes Liquid Glass with three principles (reference, not a mandate):