I'm trying to make a Storage Expiration Notification APP. I create a class called Product, here are the properties. @NSManaged public var productName: String? @NSManaged public var quantity: String? @NSManaged public var category = ["", "Food", "Daily", "Makeup"] @NSManaged public…
I have a tax Create/Edit View, and List View,View Model Class as Observable Object. I update values to core data in viewModel class from an edit view, that updated values are not reflecting in list view which uses the same…
I have an entity named Item. I have an export function that exports all Items to CSV. So name, weight, quantity and etc is all exported correctly. The purpose of this is to save the data so that it may…
I would love to get help on this one since I've been on it for a while. So I fetch my Sections like this and they all get in the right order, but the relationship "Todoitem" they have do not…
Currently, I have a note application, which I am using the following CoreData structure. extension Note { @nonobjc public class func fetchRequest() -> NSFetchRequest<Note> { return NSFetchRequest<Note>(entityName: "Note") } @NSManaged public var heavy_body: String? @NSManaged public var lite_title: String? @NSManaged…
I am reading data with following code from CoreData but instead of that can we read first attribute names "firstName", "lastName", "age" from CoreData into an array and read their values instead of writing all the names in code. It…
It seems there are 2 ways to perform asynchronous read in CoreData, without blocking main thread UI. newBackgroundContext + NSFetchRequest Source : https://www.advancedswift.com/core-data-background-fetch-save-create/ // Create a new background managed object context let context = persistentContainer.newBackgroundContext() // If needed, ensure the…
I want to start learning to use NSAsynchronousFetchRequest by referring to https://www.marcosantadev.com/coredata_crud_concurrency_swift_2/ I have the simplest use case of NSAsynchronousFetchRequest NSAsynchronousFetchRequest // Call from UI main thread func X() { let fetchRequest = NSFetchRequest<NSPlainNote>(entityName: "NSPlainNote") let asynchronousFetchRequest = NSAsynchronousFetchRequest(fetchRequest: fetchRequest)…
In CoreData each instance of NSManagedObject is unique. This is why CoreData uses NSSet (and its ordered counterpart NSOrderedSet) to represent collections. However, I need a list that permits an item to appear more than once. My intuition was to…
So my questions is, Is it right way if we use backgroundContext in main thread ? Here I want to use 'performAndWait' so the statements after this CoreData operation should execute after CoreData save. private lazy var backgroundContext: NSManagedObjectContext =…