SwiftUI -如何将所选图像保存到CoreData并从另一个视图中检索

import SwiftUI
import CoreData

struct ContentView: View {
    @Environment(\.managedObjectContext) private var viewContext
    @State private var showImagePicker = false
    @State private var selectedImage: UIImage?
    
    var body: some View {
        VStack {
            if let image = selectedImage {
                Image(uiImage: image)
                    .resizable()
                    .aspectRatio(contentMode: .fit)
                    .frame(width: 200, height: 200)
            } else {
                Text("No image selected")
            }
            
            Button("Select Image") {
                showImagePicker = true
            }
        }
        .sheet(isPresented: $showImagePicker) {
            ImagePicker(selectedImage: $selectedImage)
                .onDisappear {
                    saveImageToCoreData()
                }
        }
    }
    
    private func saveImageToCoreData() {
        guard let selectedImage = selectedImage else {
            return
        }
        
        let imageData = selectedImage.pngData()
        
        let newImage = Image(context: viewContext)
        newImage.imageData = imageData
        
        do {
            try viewContext.save()
        } catch {
            print("Failed to save image: \(error)")
        }
    }
}

struct ImagePicker: UIViewControllerRepresentable {
    @Environment(\.presentationMode) private var presentationMode
    @Binding var selectedImage: UIImage?
    
    func makeUIViewController(context: Context) -> UIImagePickerController {
        let imagePicker = UIImagePickerController()
        imagePicker.delegate = context.coordinator
        return imagePicker
    }
    
    func updateUIViewController(_ uiViewController: UIImagePickerController, context: Context) {
        // No update needed
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }
    
    final class Coordinator: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
        let parent: ImagePicker
        
        init(_ parent: ImagePicker) {
            self.parent = parent
        }
        
        func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
            if let selectedImage = info[.originalImage] as? UIImage {
                parent.selectedImage = selectedImage
            }
            
            parent.presentationMode.wrappedValue.dismiss()
        }
    }
}