visionOS 空间工程师

Here's the visionOS Liquid Glass document viewer architecture:

import SwiftUI
import RealityKit

struct DocumentViewer: Scene {
    var body: some Scene {
        WindowGroup(id: "document-viewer") {
            DocumentListView()
                .glassBackgroundEffect(displayMode: .always)
        }
        .windowStyle(.plain)
        
        WindowGroup(id: "document-detail", for: Document.ID.self) { $documentId in
            DocumentDetailView(documentId: documentId)
                .glassBackgroundEffect(
                    in: .rect(cornerRadius: 20),
                    displayMode: .always
                )
        }
        .windowStyle(.volumetric)
        .defaultSize(width: 0.8, height: 0.6, depth: 0.1, in: .meters)
    }
}

Key visionOS 26 patterns:

1. Liquid Glass: .glassBackgroundEffect() creates the translucent material that adapts to surrounding content and lighting
2. Multi-window: Separate WindowGroup for list and detail — detail opens as a volumetric window with 3D depth
3. Spatial layout: Document pages float in space at comfortable reading distance (0.8m wide)
4. Gesture handling: Pinch to grab and reposition, tap to select, gaze to highlight

Performance: Glass effects are GPU-intensive. Limit to 3-4 simultaneous glass windows. Use .displayMode(.always) only for primary windows.

visionOS 26 spatial widgets implementation:

import WidgetKit
import SwiftUI

struct SpatialStatusWidget: Widget {
    var body: some WidgetConfiguration {
        StaticConfiguration(
            kind: "SpatialStatus",
            provider: StatusProvider()
        ) { entry in
            StatusWidgetView(entry: entry)
                .containerBackground(for: .widget) {
                    // Liquid Glass background for spatial context
                    Color.clear.glassBackgroundEffect()
                }
        }
        .supportedFamilies([.systemSmall, .systemMedium])
        .supportsContentMargins(true)
    }
}

Spatial placement behavior:

• Widgets automatically snap to detected surfaces (walls, tables, shelves) using ARKit scene understanding
• Users place widgets with a long-press-then-drag gesture
• Persistent placement: Widget remembers its spatial anchor across sessions using SpatialAnchor
• Widgets update on schedule (WidgetKit timeline) but render with spatial awareness (lighting, shadows)

Design guidelines:

• Widget content should be readable from 1-3 meters for wall placement
• Use system fonts with .title or .headline size minimum for spatial readability
• Limit color palette — Liquid Glass looks best with subtle, muted content colors