Binary operator '==' cannot be applied to operands of type 'UILabel?' and 'String'

Question

Error : Binary operator \'==\' cannot be applied to operands of type \'UILabel?\' and \'String\'

import UIKit

class ViewController: UIViewController {
  let So         


        

Answer 1

An UIButton exposes its label through an UILabel that manage the drawing of its text. Thus change:

let hardness = sender.titleLabel

to

let hardness = sender.titleLabel.text

UIKit docs says:

UIButton

var titleLabel: UILabel?

A view that displays the value of the currentTitle property for a button.

and:

UILabel

var text: String?

The current text that is displayed by the label.

There is also a more direct way using the currentTitle:

UIButton

var currentTitle: String?

The current title that is displayed on the button.

Thus:

let hardness = sender.currentTitle

will also work.