Getting types from NSManagedObject - ios

Question

It's my first time using core data. I'm trying to use it to store basic info about my user (if he's logged in through parse.com). So far so good with writing to core data, however, I'm struggling to get the data back. I'm able to print out the data as a [NSManagedObject], but I can't get the data into the different types ( String, Bool, and UIImage). How can I do this?
Saving Data
func saveUser(username : String, proPic : UIImage?){
//1
let appDelegate =
UIApplication.sharedApplication().delegate as! AppDelegate
let managedContext = appDelegate.managedObjectContext!
//2
let entity = NSEntityDescription.entityForName("User",
inManagedObjectContext:
managedContext)
let person = NSManagedObject(entity: entity!,
insertIntoManagedObjectContext:managedContext)
//3
person.setValue(username, forKey: "username")
person.setValue(true, forKey: "isLoggedIn")
person.setValue(proPic, forKey: "profilePic")
//4
var error: NSError?
if !managedContext.save(&error) {
println("Could not save \(error), \(error?.userInfo)")
}
}
Getting Data Back
//1
let appDelegate =
UIApplication.sharedApplication().delegate as! AppDelegate
let managedContext = appDelegate.managedObjectContext!
//2
let fetchRequest = NSFetchRequest(entityName:"UserInfo")
//3
var error: NSError?
let fetchedResults =
managedContext.executeFetchRequest(fetchRequest,
error: &error) as? [NSManagedObject]

Answer 1

You can use valueForKey similar way you used setValue before. Then you need to deal with the fact that it returns AnyObject.
Another option is to generate custom NSManagedObject subclass. Select your entity in the model editor and in the top menu go to Editor->Create NSManagedObjectSubclass... It will navigate you through the steps. Once you have that, you will have custom class with properties of appropriate type for each entity attribute.