Changing text of UIButton programmatically swift

Simple question here. I have a UIButton, currencySelector, and I want to programmatically change the text. Here's what I have:

currencySelector.text = "foobar"

Xcode gives me the error "Expected Declaration". What am I doing wrong, and how can I make the button's text change?

In Swift 3, 4, 5:

button.setTitle("Button Title", for: .normal)

Otherwise:

button.setTitle("Button Title", forState: UIControlState.Normal)

Also an @IBOutlet has to declared for the button.

Just a clarification for those new to Swift and iOS programming. Below line of code:

button.setTitle("myTitle", forState: UIControlState.Normal)

only applies to IBOutlets, not IBActions.

So, if your app is using a button as a function to execute some code, say playing music, and you want to change the title from Play to Pause based on a toggle variable, you need to also create an IBOutlet for that button.

If you try to use button.setTitle against an IBAction you will get an error. Its obvious once you know it, but for the noobs (we all were) this is a helpful tip.

Swift 5.0

// Standard State
myButton.setTitle("Title", for: .normal)

Swift 5:

    let controlStates: Array<UIControl.State> = [.normal, .highlighted, .disabled, .selected, .focused, .application, .reserved]
    for controlState in controlStates {
        button.setTitle(NSLocalizedString("Title", comment: ""), for: controlState)
    }

Swift 3:

Set button title:

//for normal state:
my_btn.setTitle("Button Title", for: .normal)

// For highlighted state:
my_btn.setTitle("Button Title2", for: .highlighted)

Changing title when attributed is a bit different :

I just ran into a problem : If you have an UIButton with an Attributed Title, you have to use :

my_btn.setAttributedTitle(NSAttributedString(string: my_title), for: my_state)

as, per Apple SetTitle Doc :

> If you set both a title and an attributed title for the button, the button prefers the use of the attributed title over this one.

I had an attributed title and I tried to setTitle on it, with no effect...

Swift 3

When you make the @IBAction:

@IBAction func btnAction(_ sender: UIButton) {
  sender.setTitle("string goes here", for: .normal)
}

This sets the sender as UIButton (instead of Any) so it targets the btnAction as a UIButton

swift 4.2 and above

using button's IBOutlet

btnOutlet.setTitle("New Title", for: .normal)

using button's IBAction

@IBAction func btnAction(_ sender: UIButton) {
  sender.setTitle("New Title", for: .normal)
}

//for normal state:

btnSecurite.setTitle("TextHear", for: .normal)

As of 12/12/2021 - Swift version 5.5.1^ assuming you already have an IBOutlet linked to yourButton in a normal state.

yourButton.setTitle("Title of your button", for: .normal)

Swift 3

let button: UIButton = UIButton()
button.frame = CGRect.init(x: view.frame.width/2, y: view.frame.height/2, width: 100, height: 100)
button.setTitle(“Title Button”, for: .normal)

To set a title for a button in Xcode using swift - 04: first create a method called setTitle with parameter title and UIController state like below ;

func setTitle(_ title : String?, for state : UIControl.State)   {

}

and recall this method in your button action method like ;

yourButtonName.setTitle("String", for: .state)