从Xcode 15开始，它涉及预览宏。
我用MapKit创建了一个简单的应用程序来学习它。

struct LocationDetailsView: View {
    @Binding var mapSelection: MKMapItem?
    @Binding var show: Bool
    @State private var lookAroundScene: MKLookAroundScene?
    @Binding var getDirections: Bool
    
    var body: some View {
        VStack {
            HStack {
                VStack(alignment: .leading) {
                    Text(mapSelection?.placemark.name ?? "")
                        .font(.title2)
                        .fontWeight(.semibold)
                    
                    Text(mapSelection?.placemark.title ?? "")
                        .font(.footnote)
                        .foregroundStyle(.gray)
                        .lineLimit(2)
                        .padding(.trailing)
                }
                        
                Spacer()
                
                Button {
                    show.toggle()
                    mapSelection = nil
                } label: {
                    Image(systemName: "xmark.circle.fill")
                        .resizable()
                        .frame(width: 24, height: 24)
                        .foregroundStyle(.gray, Color(.systemGray5))
                }
            }
            .padding(.init(top: 40, leading: 20, bottom: 0, trailing: 20))
            
            if let scene = lookAroundScene {
                LookAroundPreview(initialScene: scene)
                    .frame(height: 200)
                    .cornerRadius(12)
                    .padding()
            } else {
                ContentUnavailableView("No preview available", systemImage: "eye.slash")
            }
            
            HStack(spacing: 24) {
                Button {
                    if let mapSelection {
                        mapSelection.openInMaps()
                    }
                } label: {
                    Text("Open in Maps")
                        .font(.headline)
                        .foregroundColor(.white)
                        .frame(width: 170, height: 48)
                        .background(.green)
                        .cornerRadius(12)
                }
                
                Button {
                    getDirections = true
                    show = false
                } label: {
                    Text("Get Directions")
                        .font(.headline)
                        .foregroundColor(.white)
                        .frame(width: 170, height: 48)
                        .background(.blue)
                        .cornerRadius(12)
                }
            }
            .padding(.horizontal)
        }
        .onAppear {
            print("DEBUG: Did call on appear")
            fetchLookAroundPreview()
        }
        .onChange(of: mapSelection) { oldValue, newValue in
            print("DEBUG: Did call on change")
            fetchLookAroundPreview()
        }
        .padding()
    }
}

extension LocationDetailsView {
    func fetchLookAroundPreview() {
        if let mapSelection {
            lookAroundScene = nil
            Task {
                let request = MKLookAroundSceneRequest(mapItem: mapSelection)
                lookAroundScene = try? await request.scene
                print("DEBUG: lookAroundScene \(lookAroundScene)")
            }
        }
    }
}

#Preview {
    LocationDetailsView(
        mapSelection: .constant(MKMapItem.forCurrentLocation()),
        show: .constant(true) ,
        getDirections: .constant(false)
    )
}

字符串
在预览idk中如何提供lookAroundScene属性值给它，请给予我一些建议。顺便说一句，这个lookAroundScene会显示一个关于当前mapSelection的图像，如果我能在预览中显示它就太理想了。

根据Sweeper的回答进行更新

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