Uitextfield does not take the text value of a Swift Array

Question

Guys, I’m using core data to save user input to an array. Until then the code works perfectly, the problem is when to take some element of this array and put in the Uitextfield. The code doesn’t show errors, it just doesn’t work as it should.

@IBOutlet weak var quoteTextField: UILabel!
@IBOutlet weak var addQuote: UIButton!
@IBOutlet weak var deleteQuote: UIButton!

var bookArray: Array<AnyObject> = []

override func viewDidLoad() {
    super.viewDidLoad()        

    //Pega todas as quotes guardadas no CoreData
    var appDel: AppDelegate = (UIApplication.sharedApplication().delegate as! AppDelegate)
    var context:NSManagedObjectContext = appDel.managedObjectContext!
    var request = NSFetchRequest(entityName: "BookArray")
    request.returnsObjectsAsFaults = false
    bookArray = context.executeFetchRequest(request, error: nil)!

    if (bookArray.count != 0){
        var randomIndex = Int(arc4random_uniform(UInt32(bookArray.count)))
        quoteTextField.text = bookArray[randomIndex] as? String

    }
}