dmytro-anokhin

// First we need to create entities
let authorEntity = NSEntityDescription()
authorEntity.name = "Author"
authorEntity.managedObjectClassName = NSStringFromClass(Author.self)

let publicationEntity = NSEntityDescription()
publicationEntity.name = "Publication"
publicationEntity.managedObjectClassName = NSStringFromClass(Publication.self)
publicationEntity.isAbstract = true

dmytro-anokhin

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<model>
    <entity name="Article" representedClassName="Article" parentEntity="Publication" syncable="YES" codeGenerationType="class">
        <attribute name="text" optional="YES" attributeType="String"/>
    </entity>
    <entity name="Author" representedClassName="Author" syncable="YES" codeGenerationType="class">
        <attribute name="fullName" optional="YES" attributeType="String"/>
        <relationship name="publications" optional="YES" toMany="YES" deletionRule="Cascade" destinationEntity="Publication" inverseName="author" inverseEntity="Publication"/>
    </entity>
    <entity name="Publication" representedClassName="Publication" isAbstract="YES" syncable="YES" codeGenerationType="class">

dmytro-anokhin

class ImageLoader : BindableObject {
    
    enum LoadingState : Hashable {
       // ...
    }
  
    let didChange = PassthroughSubject<ImageLoader, Never>()
    
    private(set) var state: LoadingState = .initial {
        didSet {

dmytro-anokhin

struct URLImage : View {
  
    // ...

    var body: some View {
        if let image = imageLoader.image {
            return image
                .onAppear {}
                .onDisappear {}
        }

dmytro-anokhin

struct URLImage : View {
    
    // ...
  
    @ObjectBinding private var imageLoader: ImageLoader

    var body: some View {
        if let image = imageLoader.image {
            return image
        }

dmytro-anokhin

struct URLImage : View {
    init(url: URL, placeholder: Image = Image(systemName: "photo")) {
        // ...
    }
}

dmytro-anokhin

struct ImageListView : View {

    let urls = (300..<325).map { "https://picsum.photos/\($0)" }.map { URL(string: $0)! }

    var body: some View {
        NavigationView {
            List(urls.identified(by: \.self)) { url in
                NavigationButton(destination: ImageDetailView(url: url)) {
                    HStack {
                        URLImage(url: url)

dmytro-anokhin

extension UIWindow {

    /// Print the app's key window hierarchy.
    class func printKeyWindowHierarchy() {
        UIApplication.shared.keyWindow?.printHierarchy()
    }
    
    /// Prints the window's view hierarchy.
    func printHierarchy() {
        traverseHierarchy { responder, level in

dmytro-anokhin

extension UIWindow {
    /// Traverse the window's view hierarchy in the same way as the Debug View Hierarchy tool in Xcode.
    ///
    /// `traverseHierarchy` uses Depth First Search (DFS) to traverse the view hierarchy starting in the window. This way the method can traverse all sub-hierarchies in a correct order.
    ///
    /// - parameters:
    ///     - visitor: The closure executed for every view object in the hierarchy
    ///     - responder: The view object, `UIView`, `UIViewController`, or `UIWindow` instance.
    ///     - level: The depth level in the view hierarchy.
    func traverseHierarchy(_ visitor: (_ responder: UIResponder, _ level: Int) -> Void) {

dmytro-anokhin

extension UIResponder {

    /// The responder chain from the target responder (self)
    ///     to the `UIApplication` and the app delegate
    var responderChain: [UIResponder] {
        var responderChain: [UIResponder] = []
        var currentResponder: UIResponder? = self

        while currentResponder != nil {
            responderChain.append(currentResponder!)