how do i change an image if i click on a button in Swift? [duplicate]

Answer 1

let image = UIImage(named: circleArray[0]) // circleArray[1], circleArray[2]

in your action function set button image

button.setImage(image, for: .normal)

Answer 2

first of all you need to give tag to UIButton

    @IBOutlet var btn: UIButton!
    let circleArray = ["circle-gray-big","circle-green-big","circle-red-big"]

    override func viewDidLoad() {
            super.viewDidLoad()
            see.btn.tag = 0
    }

    @IBAction func carbsButton(_ sender: Any) {
            button.setImage(UIImage(named: circleArray[btn.tag % 3]),forState:Normal)
            btn.tag = ban.tag + 1          
    }

Do in this manner you will definitely get what you want..If it solve the problem hit up arrow.

Answer 3

Swift 3.0

Global declaration of the class,

let circleArray = ["circle-gray-big","circle-green-big","circle-red-big"]
var index = 0

In UIImageView:

@IBOutlet var imageView: UIImageView! //Global

@IBAction func carbsButton(_ sender: Any) {

 self.index = (self.index >= self.circleArray.count-1) ? 0 : self.index+1
 self.imageView.image = UIImage(named:circleArray[index])
}

In UIButton

Change Any in carbsButton(_ sender: Any) to carbsButton(_ sender: UIButton). After do like below code,

@IBAction func carbsButton(_ sender: UIButton) {
  self.index = (self.index >= self.circleArray.count-1) ? 0 : self.index+1
   sender.setImage(UIImage(named:circleArray[index]), for: .normal)//Button
}

In UIImageView and UIButton:

let circleArray = ["circle-gray-big","circle-green-big","circle-red-big"]
var index = 0

@IBOutlet var imageView: UIImageView!    
@IBAction func carbsButton(_ sender: UIButton) {

    self.index = (self.index >= self.circleArray.count-1) ? 0 : self.index+1

    self.imageView.image = UIImage(named:circleArray[index]) //imageView
    sender.setImage(UIImage(named:circleArray[index]), for: .normal)//Button
}

Sample Output:

sender.setBackgroundImage(UIImage(named:circleArray[index]), for: .normal)

Answer 4

button.setImage(UIImage(named: circleArray[0]),forState:Normal)

You can set various images for various state of the button(e.g Normal,highlighted,selected)

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