Swift iOS: How to assign a value to a Label created with Tag system

After creation of a list of Label created with this func:

func addElongationlabel() {
        let elongationLabel = UITextView(frame: CGRect(x: 100, y: ordinata, width: 90, height: 35))
        elongationLabel.textAlignment = NSTextAlignment.center
        elongationLabel.tag = ordinata
        elongationLabel.textColor = UIColor.blue
        elongationLabel.backgroundColor = UIColor.red
        view.addSubview(elongationLabel)
    }

I'm obtaining a list of label using this cycle of For:

for i in 1...Int(numberOfDiesText.text!)!{
     ordinata = 220 + 50*i

        addElongationlabel()

    }//end of for

Now I want to assign to my Labels a value calculated. I'm trying with this code but it is not working:

for i in 1...Int(numberOfDiesText.text!)!{
     ordinata = 220 + 50*i

        if let eloLabel = (self.view.viewWithTag(ordinata)as? UILabel){
     // here I think I have to insert the correct command
        self.view.viewWithTag(ordinata) = eloLabel // this is not working...of course
        }

    }//end of for

Thank you to help me!