SwiftUI Liquid Glass

SwiftUI Liquid Glass

Use this skill to build or review SwiftUI features that fully align with the iOS 26+ Liquid Glass API. Prioritize native APIs (glassEffect, GlassEffectContainer, glass button styles) and Apple design guidance. Keep usage consistent, interactive where needed, and performance aware.

Read the full API reference at references/liquid-glass.md for detailed usage.

Workflow Decision Tree

1) Review an existing feature

• Inspect where Liquid Glass should be used and where it should not.
• Verify correct modifier order, shape usage, and container placement.
• Check for iOS 26+ availability handling and sensible fallbacks.

2) Improve a feature using Liquid Glass

• Identify target components for glass treatment (surfaces, chips, buttons, cards).
• Refactor to use GlassEffectContainer where multiple glass elements appear.
• Introduce interactive glass only for tappable or focusable elements.

3) Implement a new feature using Liquid Glass

• Design the glass surfaces and interactions first (shape, prominence, grouping).
• Add glass modifiers after layout/appearance modifiers.
• Add morphing transitions only when the view hierarchy changes with animation.

Core Guidelines

• Prefer native Liquid Glass APIs over custom blurs.
• Use GlassEffectContainer when multiple glass elements coexist.
• Apply .glassEffect(...) after layout and visual modifiers.
• Use .interactive() for elements that respond to touch/pointer.
• Keep shapes consistent across related elements for a cohesive look.
• Gate with #available(iOS 26, *) and provide a non-glass fallback.

Review Checklist

• Availability: #available(iOS 26, *) present with fallback UI.
• Composition: Multiple glass views wrapped in GlassEffectContainer.
• Modifier order: glassEffect applied after layout/appearance modifiers.
• Interactivity: interactive() only where user interaction exists.
• Transitions: glassEffectID used with @Namespace for morphing.
• Consistency: Shapes, tinting, and spacing align across the feature.

Quick Snippets

if #available(iOS 26, *) {
    Text("Hello")
        .padding()
        .glassEffect(.regular.interactive(), in: .rect(cornerRadius: 16))
} else {
    Text("Hello")
        .padding()
        .background(.ultraThinMaterial, in: RoundedRectangle(cornerRadius: 16))
}

GlassEffectContainer(spacing: 24) {
    HStack(spacing: 24) {
        Image(systemName: "scribble.variable")
            .frame(width: 72, height: 72)
            .font(.system(size: 32))
            .glassEffect()
        Image(systemName: "eraser.fill")
            .frame(width: 72, height: 72)
            .font(.system(size: 32))
            .glassEffect()
    }
}

Button("Confirm") { }
    .buttonStyle(.glassProminent)

Resources

• Reference guide: references/liquid-glass.md
• Prefer Apple docs for up-to-date API details, and use web search to consult current Apple Developer documentation.