Saving an custom object array that is appended constantly - arrays

Question

I'm relatively new to Swift and coding in general. I'm trying to hone my skills at the moment but putting together a simple reminder app. I'm trying to get the back end working before I put together the story board but I have the essential story board elements to test if my system will work.
Basically I'm trying to save a array that contains a custom object, but this array is appended to each reminder addition done by the user. This is so that every time the app opens, the array will contain the reminders from last time.
Here is the code I have so far to create and append the list;
func createReminder() {
let reminderAdd = Reminder(chosenReminderDescription: textRetrieve.text!, chosenReminderLength: 1)
reminderList.append(reminderAdd)
dump(reminderList)
}
Here is the object code;
class Reminder {
var reminderDescription = "Require initalisation."
var reminderLength = 1 // in days
init (chosenReminderDescription: String, chosenReminderLength: Int) {
reminderDescription = chosenReminderDescription
reminderLength = chosenReminderLength
}
}
How would I go about saving the array?
EDIT:
This is what i've added so far.
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let reminderAdd = Reminder(chosenReminderDescription: "Placeholder test", chosenReminderLength: 1)
reminderList.append(reminderAdd)
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Tasks", in: context)
let newTask = NSManagedObject(entity: entity!, insertInto: context)
newTask.setValue(reminderList, forKey: "taskName")
do {
try context.save()
} catch {
print("Failed saving")
}
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Tasks")
//request.predicate = NSPredicate(format: "age = %#", "12")
request.returnsObjectsAsFaults = false
do {
let result = try context.fetch(request)
for data in result as! [NSManagedObject] {
print(data.value(forKey: "taskName"))
}
} catch {
print("Failed")
}
I'm getting crashes and I can't seem to debug it as of yet. I believe this line is causing the crash as when I remove it the app launches fine.
let reminderAdd = Reminder(chosenReminderDescription: "Placeholder test", chosenReminderLength: 1)
reminderList.append(reminderAdd)
Any ideas?
EDIT 2:
datamodel
That is the data model, I'm not entirely sure what you mean to make the object into a codable. Thanks again.
EDIT 3:
ViewDidLoad
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Tasks", in: context)
let newTask = Tasks(entity: entity!, insertInto: context)
newTask.setValue(reminderList, forKey: "taskName")
do {
try context.save()
} catch {
print("Failed saving")
}
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Tasks")
//request.predicate = NSPredicate(format: "age = %#", "12")
request.returnsObjectsAsFaults = false
do {
let result = try context.fetch(request)
for data in result as! [Tasks] {
print(data.value(forKey: "taskName"))
}
} catch {
print("Failed")
}
dump(reminderList)
}

Answer 1

you could create an instance using CoreData and store it like an internal database.
These are some good tutorial to start with that:
https://medium.com/xcblog/core-data-with-swift-4-for-beginners-1fc067cca707
https://www.raywenderlich.com/7569-getting-started-with-core-data-tutorial
EDIT 2
As you can see in this image,
https://ibb.co/f1axcA
my list in coreData is of type [Notifica], so is an array of object Notifica, to implement codable you should do something like this
public class Notifica: NSObject, NSCoding {
public required init?(coder aDecoder: NSCoder) {
self.id = aDecoder.decodeObject(forKey: "id") as? Double
self.type = aDecoder.decodeObject(forKey: "type") as? String
self.idEvent = aDecoder.decodeObject(forKey: "idEvent") as? Int
self.contactPerson = aDecoder.decodeObject(forKey: "contactPerson") as? People
self.title = aDecoder.decodeObject(forKey: "title") as? String
self.date = aDecoder.decodeObject(forKey: "date") as? String
}
public func encode(with aCoder: NSCoder) {
aCoder.encode(id, forKey: "id")
aCoder.encode(type, forKey: "type")
aCoder.encode(idEvent, forKey: "idEvent")
aCoder.encode(contactPerson, forKey: "contactPerson")
aCoder.encode(title, forKey: "title")
aCoder.encode(date, forKey: "date")
}
ecc..
Another thing is to not call NSManagedObject and pass the entity, but you should name that Tasks as you called in dataModel, if you type Tasks on xcode it will fin for you the NSManagedObject created and then you can set the value for taskName
EDIT 3
"<Simple_Reminders.Reminder: 0x60400046da40>" means that a Reminder object exist! So you saved it! Reminder has two variable:
-reminderDescription and
-reminderLength, so change your code
do {
let result = try context.fetch(request)
for data in result as! [Tasks] {
print(data.value(forKey: "taskName"))
}
} catch {
print("Failed")
}
with this
do {
let result = try context.fetch(request)
for data in result as! [Tasks] {
print(data.value(forKey: "taskName"))
if let reminders = data.value(forKey: "taskName") as? [Reminder] {
for reminder in reminders {
// Now you have your single object Reminder and you can print his variables
print("Your reminder description is \(reminder. reminderDescription), and his length is \(reminder. reminderLength))"
}
}
}
} catch {
print("Failed")
}