SwiftUI: Cannot Delete List Item If Just Viewed - ios

Question

I have a very odd issue. I have a list app that crashes when I delete a list item that I just viewed. I can delete an item that is different than the one I just viewed without the crash. The crash error is:
Fatal error: Unexpectedly found nil while unwrapping an Optional value: file /Users/XXX/Documents/Xcode Projects Playground/Test-Camera-CloudKit/Test-Camera-CloudKit/DetailView.swift, line 20
Line 20 of the DetailView.swift file is the line that displays the image/photo [Image(uiImage: UIImage(data: myItem.photo!) ?? UIImage(named: "gray_icon")!)]. Below are the files from my stripped down app to try to run this issue to ground. I am using CoreData and CloudKit.
ContentView.swift:
import SwiftUI
struct ContentView: View {
#Environment(\.managedObjectContext) var moc
#FetchRequest(entity: Item.entity(), sortDescriptors: [NSSortDescriptor(key: "name", ascending: true)]) var items: FetchedResults<Item>
#State private var showingAddScreen = false
var body: some View {
NavigationView {
List {
ForEach(items, id: \.self) { item in
NavigationLink(destination: DetailView(myItem: item)) {
HStack {
Text(item.name ?? "Unknown name")
}
}
}.onDelete(perform: delete)
}
.navigationBarTitle("Items")
.navigationBarItems(trailing:
Button(action: {
self.showingAddScreen.toggle()
}) {
Image(systemName: "plus")
}
)
.sheet(isPresented: $showingAddScreen) {
AddItemView().environment(\.managedObjectContext, self.moc)
}
}
}
func delete(at offsets: IndexSet) {
for index in offsets {
let item = items[index]
moc.delete(item)
}
do {
try moc.save()
} catch {
print("Error deleting objects")
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
AddItemView.swift:
import SwiftUI
struct AddItemView: View {
#Environment(\.managedObjectContext) var moc
#Environment(\.presentationMode) var presentationMode
#State private var image : Data = .init(count: 0)
#State private var name = ""
#State private var show = false
var body: some View {
NavigationView {
Form {
Section {
TextField("Name of item", text: $name)
}
Section {
VStack {
Button(action: {self.show = true}) {
HStack {
Image(systemName: "camera")
}
}
Image(uiImage: UIImage(data: self.image) ?? UIImage(named: "gray_icon")!)
.resizable()
.aspectRatio(contentMode: .fill)
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: 300, alignment: Alignment.center)
.clipped()
}
.sheet(isPresented: self.$show, content: {
ImagePicker(show: self.$show, image: self.$image)
})
}
Section {
Button("Save") {
let newItem = Item(context: self.moc)
newItem.name = self.name
newItem.photo = self.image
try? self.moc.save()
self.presentationMode.wrappedValue.dismiss()
}
}
}
.navigationBarTitle("Add Item")
}
}
}
struct AddItemView_Previews: PreviewProvider {
static var previews: some View {
AddItemView()
}
}
DetailView.swift
import SwiftUI
struct DetailView: View {
#Environment(\.managedObjectContext) var moc
#ObservedObject var myItem: Item
var body: some View {
VStack {
Text(myItem.name ?? "Unknown")
Image(uiImage: UIImage(data: myItem.photo!) ?? UIImage(named: "gray_icon")!)
.resizable()
.aspectRatio(contentMode: .fill)
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: 300, alignment: Alignment.center)
.clipped()
}
.navigationBarTitle(Text(myItem.name ?? "Unknown"), displayMode: .inline)
}
}
struct DetailView_Previews: PreviewProvider {
static let moc = NSManagedObjectContext(concurrencyType: .mainQueueConcurrencyType)
static var previews: some View {
let item = Item(context: moc)
item.name = "Test"
return NavigationView {
DetailView(myItem: item)
}
}
}
ImagePicker.swift
import SwiftUI
import Combine
struct ImagePicker : UIViewControllerRepresentable {
#Binding var show : Bool
#Binding var image : Data
func makeCoordinator() -> ImagePicker.Coordinator {
return ImagePicker.Coordinator(child1: self)
}
func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> UIImagePickerController {
let picker = UIImagePickerController()
picker.sourceType = .photoLibrary
picker.delegate = context.coordinator
return picker
}
func updateUIViewController(_ uiViewController: UIImagePickerController, context: UIViewControllerRepresentableContext<ImagePicker>) {
}
class Coordinator : NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var child : ImagePicker
init(child1: ImagePicker) {
child = child1
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
self.child.show.toggle()
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let image = info[.originalImage]as! UIImage
let data = image.jpegData(compressionQuality: 0.45)
self.child.image = data!
self.child.show.toggle()
}
}
}
I am really struggling with how does the app have an error in a view that is not being shown when an item is deleted. The list items does get deleted and removed from CloudKit. The delete operation works. The crash and error happens whether the coredata attribute for the photo has a photo or not. In other words, it has the error even when the item does have a photo and is not nil. Where am I going wrong? How do I get it to allow me to delete an item that I just viewed in the DetailView without a nil error? Any help is greatly appreciated. Thanks.