swift save multiple manage objects - swift

Question

Having issues saving my manage objects within my code. For some reason when i place data in the first view controller everything works well. For instance
I place new categories such as "Fruits", "Dairy", "Meats". The first view controller takes the data. When I click on the specific item such as "Dairy", and put in "Milk" for items within that section. If I go back to the previous view controller and click on "Meats", I see the same data i put in under "Dairy". How do i properly manage my NSManage objects.
Here is my code below.
import UIKit
import CoreData
class HomeSpecificItemViewController: UIViewController {
var selectedItem : [Items] = []
#IBOutlet weak var itemNameTextField: UITextField!
#IBOutlet weak var brandNameTextField: UITextField!
#IBOutlet weak var caloriesTextField: UILabel!
#IBOutlet weak var priceTextField: UILabel!
#IBOutlet weak var amountTextField: UITextField!
#IBOutlet weak var threshHoldNumberField: UITextField!
#IBOutlet weak var stepper: UIStepper!
override func viewDidLoad() {
super.viewDidLoad()
stepper.wraps = true
stepper.autorepeat = true
stepper.maximumValue = 10
// Do any additional setup after loading the view.
}
#IBAction func saveButton(sender: AnyObject) {
let context = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
let itemDescription = NSEntityDescription.insertNewObjectForEntityForName("Items", inManagedObjectContext: context) as! Items
itemDescription.setValue(itemNameTextField.text, forKey: "Items")
itemDescription.setValue(brandNameTextField.text, forKey: "Items")
do {
try context.save()
}catch _ {
}
/*
let request = NSFetchRequest(entityName: "Items")
let results : [AnyObject]?
do {
results = try context.executeFetchRequest(request)
}catch _ {
results = nil
}
if results != nil {
self.itemDescription = results as! [Items]
}
*/
}
#IBAction func cancelPressed(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
#IBAction func increaseNumberStepper(sender: UIStepper) {
threshHoldNumberField.text = Int(sender.value).description
}
}

Answer 1

Do you have a specific view controller for each category? If so, what you have to do is add predicates to your more specific view controllers.
Something like:
var request = NSFetchRequest(entityName: "Food")
request.predicate = NSPredicate(format: "category == %#", "Meat")
meats = try! context.executeFetchRequest(request)
This would return an array of all Food objects whose category atribute holds the string "Meat".

Answer 2

I was saving my data to core data without properly declaring the manage context and without assigning the text labels to the core data object.
issue resolved!