Is there a way to compare button images in Swift/iOS

Question

I've looked around and I don't think there's a way to do this, but what I'm looking for is the ability to compare button images. I have a situation where I want to see if the button is set to a certain image before I change it. The pseudocode would be something like

if (myCell.followButton.image == UIImage(named: "")) {
//do something here
}

Answer 1

On iOS 13 @Matt Cooper's answer does not work, I'm not sure but other infos are included in the name of the image (maybe changes in the API since 2015), so my comparison always returns false:

UIImage: 0x28297e880 named (main: Icon-camera-alt) {20, 20}

I've used this in my case:

myButton.currentImage?.description.contains("camera-alt")

Answer 2

It can be done in following way:

   if let btnImage = sender.image(for: .normal),
        let Image = UIImage(named: "firstImage.png"), UIImagePNGRepresentation(btnImage) == UIImagePNGRepresentation(Image)
    {
        sender.setImage(UIImage(named:"secondImage.png"), for: .normal)

    }
   else 
    {
         sender.setImage( UIImage(named:"firstImage.png"), for: .normal)
    }