Delete Core Data Row When Long Pressing - swiftui

Question

I have created a new Mac OS xcode application with core data and was playing around with the default code that generates that allows you to add items.
But I wanted to change the way in which the rows are deleted. With using a long press gesture to trigger the delete.
View:
var body: some View {
List {
ForEach(items) { item in
Text("Item at \(item.timestamp!, formatter: itemFormatter)")
}
//.onDelete(perform: deleteItems) Want to change this command to the one below
.onLongPressGesture(minimumDuration: 1.5, perform: deleteItems)
}
.toolbar {
Button(action: addItem) {
Label("Add Item", systemImage: "plus")
}
}
}
Delete Item Function
private func deleteItems(offsets: IndexSet) {
withAnimation {
offsets.map { items[$0] }.forEach(viewContext.delete)
do {
try viewContext.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
But I get the following error
Cannot convert value of type '(IndexSet) -> ()' to expected argument type '() -> Void'

Answer 1

".onDelete(perform action: ((IndexSet) -> Void)?)" and
".onLongPressGesture(minimumDuration: Double = 1.5, perform action: #escaping () -> Void)"
as you can see have different signatures. So what you are doing is not working.
You could try something like this:
List {
ForEach(items, id: \.self) { item in
Text("Item at \(item)")
.onLongPressGesture(minimumDuration: 1.5, perform: {deleteItems2(item)})
}
// .onDelete(perform: deleteItems)
}
private func deleteItems2(_ item: Item) {
if let ndx = items.firstIndex(of: item) {
viewContext.delete(items[ndx])
do {
try viewContext.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}