Qfyilyi

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)

}

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")

}