ContentView.swift

import PhotosUI
import SwiftUI

class ImageModel: ObservableObject {
    enum ImageState {
        case empty, loading(Progress), success(Image), failure(Error)
    }
    
    @Published private(set) var imageState: ImageState = .empty
    @Published var imageSelection: PhotosPickerItem? {
        didSet {
            if let imageSelection {
                let progress = loadTransferable(from: imageSelection)
                imageState = .loading(progress)
            } else {
                imageState = .empty
            }
        }
    }
    
    private func loadTransferable(from imageSelection: PhotosPickerItem) -> Progress {
        imageSelection.loadTransferable(type: Image.self) { result in
            DispatchQueue.main.async {
                guard imageSelection == self.imageSelection else { return }
                print(imageSelection)
                switch result {
                case .success(let image?):
                    self.imageState = .success(image)
                case .success(nil):
                    self.imageState = .empty
                case .failure(let error):
                    self.imageState = .failure(error)
                }
            }
        }
    }
}

struct MyImage: View {
    let imageState: ImageModel.ImageState
    
    var body: some View {
        switch imageState {
        case .success(let image):
            image.resizable().scaledToFill()
        case .loading:
            ProgressView()
        case .empty:
            Image(systemName: "person.crop.circle.badge.plus")
                .font(.system(size: 40))
        case .failure:
            Image(systemName: "exclamationmark.triangle.fill")
                .font(.system(size: 40))
        }
    }
}

struct EditableMyImage: View {
    @ObservedObject var viewModel: ImageModel
    
    var body: some View {
        MyImage(imageState: viewModel.imageState)
    }
}

struct ContentView: View {
    @StateObject var viewModel = ImageModel()
    
    var body: some View {
        VStack {
            PhotosPicker(selection: $viewModel.imageSelection, matching: .images) {
                EditableMyImage(viewModel: viewModel)
                    .frame(width: 100, height: 100)
            }
        }
    }
}