In many games and apps I have seen when you click on something, the button image change and while your finger is still on the botton and move it from the button, the image change again and the button is not clicked
In spriteKit I normaly do
In ViewController
But I don't know how to animate the button when is pressed/hovered and release(return to default state) when the finger is not on button
You can set two images to the button for the highlighted and normal state like this
button.setImage(imageUnhighlighted, forState: UIControlState.Normal)
button.setImage(imageHighlighted, forState: UIControlState.Highlighted)