native_liquid_glass 0.2.6

Liquid Glass iOS platform views for Flutter using native UIKit components.

native_liquid_glass

A Flutter plugin that exposes iOS native Liquid Glass widgets through Flutter Platform Views (UiKitView).

On iOS 26+, all widgets automatically adopt Apple's Liquid Glass visual style. On older iOS versions and non-iOS platforms, graceful fallbacks are provided.

Widgets

Widget	Native UIKit component
LiquidGlassTabBar	UITabBarController
LiquidGlassButton	UIButton with glass configurations
LiquidGlassButtonGroup	Row/column of UIButtons with unified glass blending
LiquidGlassContainer	Glass-effect UIView with custom shapes, animated transitions, and interactive press
LiquidGlassNavigationBar	UINavigationBar
LiquidGlassToolbar	UIToolbar
LiquidGlassSearchBar	Expandable UISearchTextField
LiquidGlassSearchScaffold	Full-screen scaffold with native tab bar + UISearchTab
LiquidGlassToggle	UISwitch
LiquidGlassSlider	UISlider
LiquidGlassStepper	UIStepper
LiquidGlassSegmentedControl	UISegmentedControl
LiquidGlassColorPicker	UIColorWell
LiquidGlassDatePicker	UIDatePicker
LiquidGlassMenu	UIButton + UIMenu context menu
LiquidGlassSheet	UISheetPresentationController
LiquidGlassAlert	UIAlertController
LiquidGlassPopover	UIPopoverPresentationController
LiquidGlassActivityIndicator	UIActivityIndicatorView
LiquidGlassProgressView	UIProgressView

Requirements

• Flutter 3.41.2+
• iOS/iPadOS 26.0+ for full Liquid Glass behavior (older iOS versions fall back to standard system styles)

Integration

This plugin supports both CocoaPods and Swift Package Manager (SPM).

• CocoaPods (default) — works automatically with flutter pub get
• SPM — supported from Flutter 3.19+ via ios/native_liquid_glass/Package.swift

Installation

dependencies:
    native_liquid_glass: ^0.2.6

Then run flutter pub get.

Icons

All icon-bearing widgets accept NativeLiquidGlassIcon, which supports three sources:

NativeLiquidGlassIcon.sfSymbol('star.fill')    // Native SF Symbol (preferred on iOS)
NativeLiquidGlassIcon.iconData(Icons.star)      // Flutter IconData (PNG-encoded for iOS)
NativeLiquidGlassIcon.asset('assets/star.png')  // App bundle asset (PNG or SVG)

On iOS, source resolution priority is asset → IconData → SF Symbol.

Usage

LiquidGlassTabBar

LiquidGlassTabBar(
  items: const [
    LiquidGlassTabItem(
      label: 'Home',
      icon: NativeLiquidGlassIcon.sfSymbol('house'),
      selectedIcon: NativeLiquidGlassIcon.sfSymbol('house.fill'),
      selectedItemColor: Color(0xFF007AFF),
      iosBadgeValue: '3',
    ),
    LiquidGlassTabItem(
      label: 'Search',
      icon: NativeLiquidGlassIcon.sfSymbol('magnifyingglass'),
    ),
    LiquidGlassTabItem(
      label: 'Profile',
      icon: NativeLiquidGlassIcon.iconData(Icons.person_outline),
      selectedIcon: NativeLiquidGlassIcon.iconData(Icons.person),
    ),
  ],
  currentIndex: _selectedIndex,
  onTabSelected: (index) => setState(() => _selectedIndex = index),
  height: 72,
  selectedItemColor: Colors.blue,
  labelTextStyle: const TextStyle(fontSize: 11, fontWeight: FontWeight.w600),
)

LiquidGlassButton

// Text button
LiquidGlassButton(
  label: 'Continue',
  onPressed: () {},
  icon: NativeLiquidGlassIcon.sfSymbol('arrow.right'),
  style: LiquidGlassButtonStyle.prominentGlass,
)

// Icon-only button
LiquidGlassButton.icon(
  onPressed: () {},
  icon: NativeLiquidGlassIcon.sfSymbol('heart.fill'),
  tint: const Color(0xFFFF375F),
  size: 50,
)

LiquidGlassButtonGroup

LiquidGlassButtonGroup(
  buttons: [
    LiquidGlassButtonData(
      label: 'Bold',
      icon: NativeLiquidGlassIcon.sfSymbol('bold'),
      onPressed: () {},
    ),
    LiquidGlassButtonData(
      label: 'Italic',
      icon: NativeLiquidGlassIcon.sfSymbol('italic'),
      onPressed: () {},
    ),
  ],
  axis: Axis.horizontal,
  spacing: 8,
)

LiquidGlassContainer

// Basic container
LiquidGlassContainer(
  config: const LiquidGlassConfig(
    effect: LiquidGlassEffect.regular,
    shape: LiquidGlassEffectShape.capsule,
    tint: Color(0xFF007AFF),
    interactive: true,
  ),
  width: 200,
  height: 80,
  onTap: () => print('tapped'),
  child: const Center(child: Text('Glass!')),
)

// Wraps child when width/height omitted (like Flutter Container)
LiquidGlassContainer(
  config: const LiquidGlassConfig(shape: LiquidGlassEffectShape.rect),
  child: Padding(
    padding: EdgeInsets.all(20),
    child: Text('Wraps content'),
  ),
)

// Custom SVG shape (hand-built)
LiquidGlassContainer(
  config: LiquidGlassConfig(
    shape: LiquidGlassEffectShape.custom,
    customPath: [
      LiquidGlassPathOp.moveTo(50, 0),
      LiquidGlassPathOp.lineTo(150, 0),
      LiquidGlassPathOp.lineTo(200, 60),
      LiquidGlassPathOp.lineTo(150, 120),
      LiquidGlassPathOp.lineTo(50, 120),
      LiquidGlassPathOp.lineTo(0, 60),
      LiquidGlassPathOp.close(),
    ],
    customPathSize: Size(200, 120),
  ),
  width: 200,
  height: 120,
  child: const Center(child: Text('Diamond')),
)

// Custom shape from an SVG path string (`d` attribute of <path>)
LiquidGlassContainer(
  config: LiquidGlassConfig(
    shape: LiquidGlassEffectShape.custom,
    customPath: 'M50 0 L150 0 L200 60 L150 120 L50 120 L0 60 Z'
        .toLiquidGlassPath(),
    customPathSize: const Size(200, 120),
  ),
  width: 200,
  height: 120,
  child: const Center(child: Text('Diamond')),
)

// Animated transitions between shapes/effects
LiquidGlassContainer(
  config: LiquidGlassConfig(shape: _currentShape),
  animateChanges: true, // spring transition on config changes
  child: myContent,
)

LiquidGlassNavigationBar

LiquidGlassNavigationBar(
  title: 'Settings',
  leadingItems: const [
    LiquidGlassNavBarItem(
      id: 'back',
      icon: NativeLiquidGlassIcon.sfSymbol('chevron.left'),
      label: 'Back',
    ),
  ],
  trailingItems: const [LiquidGlassNavBarItem(id: 'done', label: 'Done')],
  onItemTapped: (id) {},
)

LiquidGlassToolbar

LiquidGlassToolbar(
  items: const [
    LiquidGlassToolbarItem(id: 'share', icon: NativeLiquidGlassIcon.sfSymbol('square.and.arrow.up')),
    LiquidGlassToolbarSpacer(),
    LiquidGlassToolbarItem(id: 'done', label: 'Done'),
  ],
  onItemTapped: (id) {},
)

Controls

// Toggle
LiquidGlassToggle(value: _isOn, onChanged: (v) => setState(() => _isOn = v))

// Slider
LiquidGlassSlider(value: _volume, min: 0, max: 1, onChanged: (v) => setState(() => _volume = v))

// Stepper
LiquidGlassStepper(value: _count, min: 0, max: 10, onChanged: (v) => setState(() => _count = v))

// Segmented control
LiquidGlassSegmentedControl(
  labels: const ['Day', 'Week', 'Month'],
  selectedIndex: _period,
  onValueChanged: (i) => setState(() => _period = i),
)

Indicators

LiquidGlassActivityIndicator(animating: _isLoading)

LiquidGlassProgressView(progress: _uploadProgress, progressTintColor: Colors.blue)

Search

LiquidGlassSearchBar(
  placeholder: 'Search',
  expandable: true,
  onChanged: (query) {},
  onSubmitted: (query) {},
)

Pickers

LiquidGlassColorPicker(
  selectedColor: _selectedColor,
  onColorChanged: (color) => setState(() => _selectedColor = color),
)

LiquidGlassDatePicker(
  mode: LiquidGlassDatePickerMode.date,
  initialDate: DateTime.now(),
  onDateChanged: (date) {},
)

Context Menu

LiquidGlassMenu(
  items: const [
    LiquidGlassMenuItem(
      id: 'copy',
      title: 'Copy',
      icon: NativeLiquidGlassIcon.sfSymbol('doc.on.doc'),
    ),
    LiquidGlassMenuItem(id: 'delete', title: 'Delete', isDestructive: true),
  ],
  onItemSelected: (id) {},
  label: 'Actions',
)

Modals

// Alert
final actionId = await LiquidGlassAlert.show(
  context: context,
  title: 'Delete?',
  message: 'This cannot be undone.',
  actions: [
    const LiquidGlassAlertAction(id: 'delete', title: 'Delete', isDestructive: true),
    const LiquidGlassAlertAction(id: 'cancel', title: 'Cancel', isCancel: true),
  ],
);

// Sheet
LiquidGlassSheet.show(
  context: context,
  title: 'Options',
  detents: [LiquidGlassSheetDetent.medium],
);

// Popover
LiquidGlassPopover.show(
  context: context,
  builder: (_) => const Text('Popover content'),
  anchorRect: Offset.zero & const Size(50, 50),
);

Overlay suppression

Native glass platform views sit above Flutter's rendering surface. When Flutter shows overlays (showModalBottomSheet, showDialog, page transitions), the glass can bleed through.

This is handled automatically — every glass widget hides itself when its route is no longer current and restores when it is. Glass items inside the overlay stay visible. No setup required.

For custom overlays that don't go through the Navigator, use the manual API:

NativeLiquidGlassLifecycle.suppressGlassEffects();
await showMyCustomOverlay();
NativeLiquidGlassLifecycle.unsuppressGlassEffects();

Device qualification check

if (NativeLiquidGlassUtils.supportsLiquidGlass) {
  // Running on iOS 26+ — full Liquid Glass behavior active.
}

Spring Animation System

Cupertino-style spring physics for Flutter animations, built on SpringSimulation.

Presets

Preset	Duration	Bounce	Use case
LiquidGlassSpring.bouncy()	500ms	0.3	Playful, expressive
LiquidGlassSpring.snappy()	500ms	0.15	Quick UI transitions
LiquidGlassSpring.smooth()	500ms	0.0	Critically-damped, no overshoot
LiquidGlassSpring.interactive()	150ms	0.14	Tracking a pointer

SpringBuilder

SpringBuilder(
  value: _expanded ? 1.5 : 1.0,
  spring: LiquidGlassSpring.bouncy(),
  builder: (context, value, child) {
    return Transform.scale(scale: value, child: child);
  },
  child: myWidget,
)

VelocitySpringBuilder (drag + release)

VelocitySpringBuilder(
  value: _dragOffset,
  active: _isDragging,
  springWhenActive: LiquidGlassSpring.interactive(),
  springWhenReleased: LiquidGlassSpring.snappy(),
  builder: (context, value, velocity, child) {
    return Transform.translate(offset: Offset(value, 0), child: child);
  },
  child: myWidget,
)

Controllers (imperative API)

final ctrl = SingleSpringController(
  vsync: this,
  spring: LiquidGlassSpring.snappy(),
  initialValue: 0.0,
);

ctrl.animateTo(1.0); // spring to target, preserving velocity
ctrl.setValue(0.5);   // instant jump

SVG Path Utility

SvgPathExtension on String parses SVG path data (the d attribute of an <path> element) into Flutter paths or LiquidGlassConfig.customPath ops — so you can take an SVG straight from a design tool and drop it into a glass container.

// Flutter Path
final path = 'M10 10 L20 20 Z'.toPath();

// Scaled Flutter Path (from SVG viewBox to target size)
final scaled = 'M10 10 L20 20 Z'.toPathScaled(
  viewBox: const Size(30, 30),
  target: const Size(120, 120),
);

// Direct to LiquidGlassConfig.customPath
LiquidGlassContainer(
  config: LiquidGlassConfig(
    shape: LiquidGlassEffectShape.custom,
    customPath: 'M50 0 L150 0 L200 60 L150 120 L50 120 L0 60 Z'
        .toLiquidGlassPath(),
    customPathSize: const Size(200, 120),
  ),
  child: ...,
)

// Handles non-zero-origin viewBoxes (e.g. "1 0 24 226")
LiquidGlassContainer(
  config: LiquidGlassConfig(
    shape: LiquidGlassEffectShape.custom,
    customPath: svgD.toLiquidGlassPathScaled(
      viewBox: const Rect.fromLTWH(1, 0, 24, 226),
      target: const Size(48, 452),
    ),
    customPathSize: const Size(48, 452),
  ),
  child: ...,
)

Leading whitespace, newlines, comments, or stray characters before the first M/m are stripped automatically, so pasted SVG strings "just work". Quadratic Béziers are normalized to cubic Béziers to match iOS's path rendering.

How it works

Each widget creates a UiKitView that Flutter embeds into the render tree. The iOS plugin registers a native FlutterPlatformViewFactory for each view type. Initial configuration is passed through creationParams; subsequent changes are pushed over a per-view FlutterMethodChannel.

On iOS 26+, all native UIKit controls automatically receive Apple's Liquid Glass styling. On older iOS versions, the same controls render with their standard system appearance.

Notes

• Tab bar background, shadow, and badge styling are intentionally system-driven.
• Widgets that require custom icon data (non-SF Symbol) rasterize or load assets asynchronously before the platform view is shown; a same-size placeholder is displayed during resolution.
• See example/ for a working demo of all widgets.

Happy building. Thanks for trying native_liquid_glass.