how to get core data entity after app closes

The issueĪlthough this is indeed a good thing, that method might either pose performance issues and/or raise unexpected exceptions in our code. It can be seen as a property which is automatically saved to (and read from) UserDefaults.This piece of code is usually put inside the Main() method of the Program.cs file and will ensure that the DB is not only present, but also up-to-date and perfectly matching the migrations present in the actual code. Important: Only display text if the disease item is available!!!!Ī little bit hacky, but this works for is a convenient way to save and read variables from UserDefaults and use them in the same way as properties.

Be safe on your Views where some CoreData elements are accessed - Check for isFault!.NavigationLink(destination: EntryView(entry: self.entries)) struct JournalView: View private var Entry.entity(), Here is a view that passes a core data entry object to another view. Here is the core data object, which is an observable object by default: class Entry: NSManagedObject, Identifiable public var date: Date It only makes sense to use a but this cannot be an optional, which means when the object assigned to it gets deleted, the app crashes, because i cannot set it to nil.

And I cannot use a variable, as swiftui controls require bindings. I cannot use because it's a fetched object. I have tried assigning the passed in core data object to a optional but this does not work. How is this suppose to work? I seriously cannot make anything remotely complex with SwiftUI it seems.

I have confirmed this by wrapping the core data object variable into a view model as an optional, then set the object to nil right after the context delete action and the app works fine, but this is not a solution because I need the core data object to bind to the swift ui views and be the source of truth. Im finding it impossible to use core data with SwiftUI, because as I pass a core data to a view observed object variable, the navigation link view will hold a reference to the object even after the view has disappeared, so as soon as I delete the object from context the app crashes, with no error messages.

How to get core data entity after app closes