How do I adjust the transparency (alpha) of a button in Swift?

Question

My button is

flButton

but when I try to set the

alpha

to

0

, it gives me the error

Value of type '(Any) -> ()
has no member
alpha
".

Do I have to replace

Any

in the

@IBAction

line?

import UIKit



class FirstLaunchView: UIViewController {



    @IBOutlet weak var logo1: UIImageView!

    @IBOutlet weak var smiley1: UIImageView!

    @IBOutlet weak var subHapp1: UILabel!

    @IBOutlet weak var happ1: UILabel!

    @IBAction func flButton(_ sender: Any) {



        UserDefaults.standard.set(false, forKey: "name")

        //launchDetector = false



        performSegue(withIdentifier: "toMain", sender: self)

    }



    @IBOutlet weak var firstLaunch: UIImageView!



    override func viewDidLoad() {

        super.viewDidLoad()



        logo1.alpha = 0

        smiley1.alpha = 0

        subHapp1.alpha = 0

        happ1.alpha = 0

        flButton.alpha = 0         

    }

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Answer 1

Your flButton is an @IBAction function. You should either create an @IBOutlet for your button or do this in your function if you want to keep it:

if let button = sender as? UIButton {
    button.alpha = 0
}

Or you could just change the type of you @IBAction function from:

@IBAction func flButton(_ sender: Any)

To:

@IBAction func flButton(_ sender: UIButton)

And then just set sender.alpha = 0.

How do I adjust the transparency (alpha) of a button in Swift?

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