How to connect UILabel text to UISlider meaning? - swift

Question

I'm new in Swift and trying to create Temperature Converter from ºC to ºF programmatically. But I have no idea how to change meaning of my label when l drag the slider.
I tried to change addTarget, but it didn't help. I really have no idea what's wrong and why my label still being "0ºC".
enter image description here
Here is my code:
class ListVC: UIViewController {
var cLabel : UILabel = UILabel()
var slider : UISlider = UISlider()
override func viewDidLoad() {
super.viewDidLoad()
**// creating label**
let cLabel = UILabel()
cLabel.frame = CGRect(x: 150, y: 250, width: 100, height: 200)
cLabel.textAlignment = .center
cLabel.text = "0ºC"
cLabel.textColor = .black
cLabel.font = UIFont(name: "Apple SD Gothic Neo", size: 25)
self.view.addSubview(cLabel)
self.view = view
**// creating slider**
let slider = UISlider()
slider.frame = CGRect(x: 110, y: 300, width: self.view.frame.width, height: 250)
slider.center = self.view.center
slider.translatesAutoresizingMaskIntoConstraints = false
slider.minimumValue = 0
slider.maximumValue = 100
slider.value = 0
slider.isContinuous = true
slider.isUserInteractionEnabled = true
slider.addTarget(self, action:#selector(sliderValue(sender:)), for: .valueChanged)
self.view.addSubview(slider)
}
**// creating function that had to change label value but something went wrong**
#objc func sliderValue(sender: UISlider) {
cLabel.text = String(sender.value)
}
Thank you!