based on https://stackoverflow.com/a/42032715

UIView+fromNib.swift

extension UIView {
    public class func fromNib(nibName: String? = nil, owner: Any? = nil) -> Self {
        return fromNib(nibName: nibName, type: self, owner: owner)
    }
    
    public class func fromNib<T: UIView>(nibName: String? = nil, type: T.Type, owner: Any? = nil) -> T {
        return fromNib(nibName: nibName, type: T.self, owner: owner)!
    }
    
    public class func fromNib<T: UIView>(nibName: String? = nil, type: T.Type, owner: Any? = nil) -> T? {
        var view: T?
        let name: String
        
        if let nibName = nibName {
            name = nibName
        } else {
            name = self.nibName
        }
        
        if let nibViews = nibBundle.loadNibNamed(name, owner: owner, options: nil) {
            if nibViews.indices.contains(nibIndex), let tog = nibViews[nibIndex] as? T {
                view = tog
            }
        }
        
        return view
    }
    
    public class var nibName: String {
        return "\(self)".components(separatedBy: ".").first ?? ""
    }
    
    public class var nibIndex: Int {
        return 0
    }
    
    public class var nibBundle: Bundle {
        return Bundle.main
    }
}


// Use like

class BaseView: UIView {
    override class var nibName: String { return "BaseView" }
    weak var delegate: StandardStateViewDelegate?
}

class MyView: BaseView {
    override class var nibIndex: Int { return 1 }
}