adding functionality to programmatically created UIButtons - ios

Question

I am trying to add functionality to dynamically created buttons. I have created buttons with functionality before but never programatically. Here is my code.
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil
{
print("error")
}
else
{
if let content = data
{
do
{
//download JSON data from php page, display data
let SongArray = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as! [[String]]
print(SongArray)
//Make buttons with JSON array
var buttonY: CGFloat = 20
for song in SongArray {
let songButton = UIButton(frame: CGRect(x: 50, y: buttonY, width: 250, height: 30))
buttonY = buttonY + 50 // 50px spacing
songButton.layer.cornerRadius = 10 //Edge formatting for buttons
songButton.backgroundColor = UIColor.darkGray //Color for buttons
songButton.setTitle("\(song[0])", for: UIControlState.normal) //button title
songButton.titleLabel?.text = "\(song[0])"
songButton.addTarget(self,action: #selector(self.songButtonPressed(_:)), for: .touchUpInside)
DispatchQueue.main.async {
self.view.addSubview(songButton) // adds buttons to view
}
}
}
catch
{
}
}
}
}
task.resume()
}
} //close viewDidLoad
func songButtonPressed(_ sender:UIButton) { // function for buttons
if sender.titleLabel?.text == "\("Song[0]")" {
print("So far so good!!")
}
}
What I ideally want to do is use the function SongButtonPressed to run when any of the buttons are pressed, so far the app just crashes when I click on a button, though they appear just fine. How can I use a function to add functionality to these buttons dynamically

Answer 1

It looks like you are using the UIKit framework, so you can use the .isHidden method or .isEnabled
The hidden method with hide the button and the enabled method will have the button appear but the user will not be able to press the button.
To use the method write the following code.
Button.isHidden = true
Or
Button.is enabled = false
But if you use these methods you need to have a button that will do the opposite (set it to true if it is false or false if it is true) so that the button can be used again.

Answer 2

Try by replacing the following line:
function name must be present in Selector attribute
SongButton.addTarget(self,action: #selector(self.SongButtonPressed(_:)), for: UIControlEvents.touchUpInside)
And most important function SongButtonPressed must be outside viewDidLoad