# How to Use iOS 26+ Liquid Glass APIs in SwiftUI: A Complete Developer Guide

> Learn to implement iOS 26+ Liquid Glass APIs in SwiftUI using glassEffect and GlassEffectContainer for hardware accelerated blur and dynamic lighting. Build stunning iOS apps today.

- Repository: [OpenAI/plugins](https://github.com/openai/plugins)
- Tags: how-to-guide
- Published: 2026-07-04

---

**Apply the `glassEffect()` modifier and `GlassEffectContainer` to render Apple’s native Liquid Glass material on iOS 26+, ensuring hardware-accelerated blur and dynamic lighting without custom layers.**

The **openai/plugins** repository houses the definitive SwiftUI Liquid Glass skill that encodes design guidance for adopting translucent materials in modern applications. According to the source definition at [`plugins/build-ios-apps/skills/swiftui-liquid-glass/SKILL.md`](https://github.com/openai/plugins/blob/main/plugins/build-ios-apps/skills/swiftui-liquid-glass/SKILL.md), iOS 26 introduces native APIs including `glassEffect()`, `GlassEffectContainer`, and `GlassButtonStyle` that replace inefficient custom blur implementations with system-optimized rendering pipelines.

## Core Principles from the Source Code

The [`SKILL.md`](https://github.com/openai/plugins/blob/main/SKILL.md) file in the openai/plugins repository establishes four fundamental rules for implementing Liquid Glass in SwiftUI applications:

- **Prefer native APIs**: Use `glassEffect()`, `GlassEffectContainer`, and built-in glass button styles rather than custom blur layers or third-party effects.
- **Leverage system containers**: Place toolbars, search fields, and sheets on floating Liquid Glass surfaces so the system manages material elevation and dynamic lighting automatically.
- **Group for performance**: Wrap multiple sibling views that share identical glass effects inside `GlassEffectContainer` to enable efficient compositing and smooth morphing transitions.
- **Customize conservatively**: The `Glass` struct allows tint, radius, and opacity adjustments, but defaults should only be overridden when specific design requirements demand it.

## Step-by-Step Implementation

### Identify Target UI Surfaces

Before applying effects, locate view hierarchies where translucent materials improve depth perception—such as bottom tab bars, side panels, or modal sheets. According to the reference documentation at [`plugins/build-ios-apps/skills/swiftui-liquid-glass/references/liquid-glass.md`](https://github.com/openai/plugins/blob/main/plugins/build-ios-apps/skills/swiftui-liquid-glass/references/liquid-glass.md), Liquid Glass is designed specifically for surfaces that sit above content and reveal the backdrop beneath them.

### Apply the `glassEffect()` Modifier

The primary entry point for Liquid Glass is the `glassEffect()` view modifier. Apply it directly to any SwiftUI view to inject the system-provided blur, tint, and dynamic lighting.

```swift
import SwiftUI

struct GlassyCard: View {
    var body: some View {
        VStack {
            Text("Hello, Liquid Glass!")
                .font(.headline)
                .foregroundColor(.primary)
        }
        .padding()
        .background(.ultraThinMaterial)  // Fallback for older iOS versions
        .glassEffect()                    // Native iOS 26+ API
        .cornerRadius(12)
        .shadow(radius: 4)
    }
}

```

The view automatically updates its blur intensity and color tint as the background content changes, reacting to ambient light conditions without manual intervention.

### Group Views with `GlassEffectContainer`

When multiple sibling views require identical glass materials, wrapping them in `GlassEffectContainer` batches rendering operations and reduces GPU overhead. This container enables the smooth morphing behavior characteristic of the iOS 26 design language.

```swift
struct Dashboard: View {
    var body: some View {
        GlassEffectContainer {
            HStack(spacing: 24) {
                Image(systemName: "heart.fill")
                Image(systemName: "star.fill")
                Image(systemName: "bolt.fill")
            }
            .font(.largeTitle)
            .foregroundStyle(.white)
        }
        .padding()
        .background(.ultraThinMaterial)  // Fallback material
    }
}

```

### Customize Appearance with the `Glass` Struct

For scenarios requiring specific visual treatment, instantiate the `Glass` struct with custom tint, radius, and opacity values, then pass it to the `glassEffect(_:)` initializer.

```swift
struct CustomGlassView: View {
    let customGlass = Glass(
        tint: .blue.opacity(0.2),   // Subtle blue tint
        radius: 20,                 // Stronger blur radius
        opacity: 0.85
    )
    
    var body: some View {
        VStack {
            Text("Custom Glass")
                .font(.title2)
                .padding()
        }
        .glassEffect(customGlass)   // Apply custom configuration
        .cornerRadius(16)
    }
}

```

This approach maintains compatibility with the native rendering pipeline while providing controlled customization.

### Use Built-In Glass Button Styles

Replace custom button backgrounds with the system-provided `GlassButtonStyle` to ensure visual consistency with Apple's design language. Apply the style using the `.glass` modifier.

```swift
struct GlassButton: View {
    var body: some View {
        Button("Press Me") {
            // Action logic
        }
        .buttonStyle(.glass)          // Applies GlassButtonStyle
        .padding()
    }
}

```

The `.glass` style automatically adapts to the current Liquid Glass material context, eliminating the need for manual background layer management.

## Testing and Validation

Run applications on physical iOS 26+ devices or simulators to verify dynamic behaviors including light adaptivity and touch feedback. The Liquid Glass system reacts to ambient lighting conditions and user interactions in ways that static design previews cannot accurately represent, making runtime testing essential for confirming correct behavior.

## Summary

- **Use `glassEffect()`** as the primary modifier for applying Liquid Glass materials to individual views in iOS 26+.
- **Wrap related views** in `GlassEffectContainer` to optimize rendering performance and enable morphing animations.
- **Implement `GlassButtonStyle`** via `.buttonStyle(.glass)` instead of custom background views for interactive controls.
- **Reference [`plugins/build-ios-apps/skills/swiftui-liquid-glass/references/liquid-glass.md`](https://github.com/openai/plugins/blob/main/plugins/build-ios-apps/skills/swiftui-liquid-glass/references/liquid-glass.md)** for authoritative code patterns and API details.
- **Maintain fallback materials** such as `.ultraThinMaterial` to support older iOS versions gracefully.

## Frequently Asked Questions

### What is the minimum iOS version required for Liquid Glass APIs?

Liquid Glass APIs including `glassEffect()` and `GlassEffectContainer` require **iOS 26 or later**. For applications supporting earlier versions, provide fallback materials like `.ultraThinMaterial` or `.regularMaterial` to maintain visual continuity across older devices.

### How does `GlassEffectContainer` improve rendering performance?

`GlassEffectContainer` batches multiple views sharing identical glass materials into a single composited surface. According to the openai/plugins source code, this container reduces GPU draw calls and enables hardware-accelerated blur and morphing effects more efficiently than applying individual modifiers to separate views.

### Can I use custom blur effects instead of the native Liquid Glass APIs?

While technically possible, the **openai/plugins** repository explicitly recommends against custom blur implementations. Native APIs in iOS 26+ are optimized for battery efficiency, dynamic lighting adaptation, and accessibility features that custom `UIVisualEffectView` wrappers cannot replicate reliably.

### Where are the definitive reference files located within the repository?

The complete API reference resides at [`plugins/build-ios-apps/skills/swiftui-liquid-glass/references/liquid-glass.md`](https://github.com/openai/plugins/blob/main/plugins/build-ios-apps/skills/swiftui-liquid-glass/references/liquid-glass.md), while high-level design guidance and usage policies are defined in [`plugins/build-ios-apps/skills/swiftui-liquid-glass/SKILL.md`](https://github.com/openai/plugins/blob/main/plugins/build-ios-apps/skills/swiftui-liquid-glass/SKILL.md). The default prompt configuration for automated tools is stored in [`plugins/build-ios-apps/skills/swiftui-liquid-glass/agents/openai.yaml`](https://github.com/openai/plugins/blob/main/plugins/build-ios-apps/skills/swiftui-liquid-glass/agents/openai.yaml).