How to change UIButton image in Swift

Question

I am trying to change the image of a UIButton using Swift... What should I do

This is OBJ-C code.but I don\'t know with Swift:

[playButton setImage:[         


        

Answer 1

I prefer the method of initializing my variables at the top first:

let playButton:UIButton!
var image:UIImage!

and then setting them in viewDidLoad

override func viewDidLoad {
  ...
  playButton = UIButton(type: .Custom)
  imagePlay = UIImage(named:"play.png")
  playButton.setImage(imagePlay, forState: .Normal)
}