Load view from nib in xcode for storyboard and code

loadViewFromNib.swift

    func loadViewFromNib(nibName: String? = "\(self)") {
        guard let nibName = nibName else { return }
        let bundle = Bundle(for: type(of: self))
        let nib = UINib(nibName: nibName, bundle: bundle)
        guard let view = nib.instantiate(withOwner: self, options: nil).first as? UIView else { return }
        view.frame = bounds
        view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        addSubview(view)
    }