How to change the background color of a UIButton when tapped in swift?

Question

ViewController: UIViewController {
   @IBAction func like(sender: AnyObject) {
       like(backgroundColor!) = UIColor.greenColor()
   }
}

I want to chanage the color of UIbutton"like button" : White is the default "not tapped or unlike" green when is tapped.

How do you change a buttons background colour when it is tapped using Swift?

score 4 · Accepted Answer · edited Feb 05 '22 at 22:12

4

The button isn't like -- that's the method's name. You can access the button through sender.

@IBAction func like(sender: AnyObject) {
    (sender as UIButton).backgroundColor = UIColor.green
}

Or more concise:

@IBAction func like(button: UIButton ) {
    button.backgroundColor = UIColor.green
}

edited Feb 05 '22 at 22:12

Jacopo Penzo

answered Mar 29 '15 at 23:22

Lyndsey Scott

It works like magic ! but why the color is not filling the png image? thank you very much – JAMESMATHEO12 Mar 29 '15 at 23:29
@JAMESMATHEO12 I don't know exactly what you mean, but it sounds as if your png image isn't actually transparent where you expect it to be. – Lyndsey Scott Mar 29 '15 at 23:30
@JAMESMATHEO12 Oh, well a UIButton is naturally rectangular so you'll have to add a corner radius to make it circular instead. – Lyndsey Scott Mar 29 '15 at 23:39

1 Answers1