https://stackoverflow.com/q/54272073/1271826

BasicButton.swift

import UIKit

class BasicButton: UIControl {
    
    // Make this private, as external objects shouldn't interact w this directly
    
    private var buttonImageView: UIImageView = {
        let logoView = UIImageView()
        logoView.contentMode = .scaleAspectFill
        logoView.tintColor = .blue
        logoView.translatesAutoresizingMaskIntoConstraints = false
        logoView.isUserInteractionEnabled = false
        return logoView
    }()
    
    // But expose `UIImage` property so you can programmatically change the image later
    
    var image: UIImage? {
        get { return buttonImageView.image }
        set { buttonImageView.image = newValue }
    }
    
    convenience init(image: UIImage) {
        self.init()
        self.image = image
    }
    
    // The following two init methods should make sure the control is property configured, too
    
    override init(frame: CGRect = .zero) {
        super.init(frame: frame)
        setupView()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setupView()
    }
    
    // Since you are setting the image view to a fixed size, you might as well declare the
    // intrinsicContentSize
    
    override var intrinsicContentSize: CGSize {
        return CGSize(width: 80, height: 80)
    }

}

private extension BasicButton {
    
    func setupView() {
        addSubview(buttonImageView)
        setupLayout()
    }
    
    func setupLayout() {
        // Personally, I don't think a view should be setting its `translatesAutoresizingMaskIntoConstraints`; 
        // it is the responsibility of the presenter to dictate how it wants to use this view;
        // I know it feels convenient to do this, but, IMHO, it's not a best practice as this violates
        // the open/closed principle.
      
        translatesAutoresizingMaskIntoConstraints = false
      
        // If we're going to use hardcoded size, let's use the intrincsic contentSize
      
        let size = intrinsicContentSize
        
        // Personally I would never force the image view to be some fixed size, but I did so because you did.
        // I'd suggest using the standard leading/trailing/top/bottom constraints, so if the class that uses this
        // decides a different size is better, this will accommodate that. But that's up to you.
        
        NSLayoutConstraint.activate([
            buttonImageView.centerXAnchor.constraint(equalTo: centerXAnchor),
            buttonImageView.centerYAnchor.constraint(equalTo: centerYAnchor),
            buttonImageView.heightAnchor.constraint(equalToConstant: size.height),
            buttonImageView.widthAnchor.constraint(equalToConstant: size.width)
        ])
    }
}

Thanks for the help. This is a thinned out version of my actual code, which is much more complex. But, seems to be a mess. If you have time to review it I would be stoked. Will post link soon.

Full Custom Button

https://gist.github.com/mickspecial/284374a3f0c5b8752cac1651f5209e00

@mickspecial - OK, I’ll check in later.