yourButton.ImageView?.image is a READ-ONLY property!!! yourButton.ImageView?.image is a READ-ONLY property!!! yourButton.ImageView?.image is a READ-ONLY property!!! yourButton.ImageView?.image is a READ-ONLY property!!! yourButton.ImageView?.image is a READ-ONLY property!!! yourButton.setImage(UIImage(named: “name_of_image”), forState: UIControlState.Normal)