Persistent data with Core Data

all the data is gone

I can save and load data. But if I close xcode and reopen it all the data is gone. 

• Where and how do you save data ?

• How do you know you effectively saved data ?

• How do you close app (in simulator I assume) ?

Code Block 
func saveProcedures(){
        guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else{
            return
        }
        let context = appDelegate.persistentContainer.viewContext
        let entityname = "Fruits"
        guard let newEnity = NSEntityDescription.entity(forEntityName: entityname, in: context) else {
            return
        }
        let newProcedure = NSManagedObject(entity: newEnity, insertInto: context)
        let size = "5-7cm"
        let caption = "Orange"
        newProcedure.setValue(size, forKey: "size")
        newProcedure.setValue(caption, forKey: "caption")
        do {
            try context.save()
            print("saved fruit")
        } catch  {
            print(error)
        }
    }
    func loadProcedure (){
        guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else{
            return
        }
        let context = appDelegate.persistentContainer.viewContext
        let entityName = "Fruits"
        let request = NSFetchRequest<NSFetchRequestResult>(entityName: entityName)
        do {
            let results = try context.fetch(request)
            for r in results{
                if let result = r as? NSManagedObject{
                    guard let importance = result.value(forKey: "size") as? String else {
                        return
                    }
                    guard let protocol_caption = result.value(forKey: "caption") as? String else {
                        return
                    }
                    self.fruitsArray.append(caption)
                    print("loaded")
                }
            }
            print ("done")
            print (fruitsArray)
        } catch  {
            print(error)
        }
    }

Code Block 
I call saveProcedures() in the view did load of the view where I want to add data.