Helper protocol that helps initilizing views with xib. This gist is only valid when `xib file` has same file name with `swift file`

XibGenerated.swift

public protocol XibGenerated {
    func setUpXib()
    func setUpViews()
}

extension XibGenerated where Self: UIView {
    public func setUpXib(bundle: Bundle? = nil) {
        let viewType = type(of: self)
        let bundle = bundle ?? Bundle(for: viewType)
        let nibName = String(describing: viewType)
        let nib = UINib(nibName: nibName, bundle: bundle)
        guard let viewXib = nib.instantiate(withOwner: self, options: nil).first as? UIView else {
            assertionFailure("Expected to instantiate view from nib named \"\(nibName)\" in bundle \"\(bundle.bundleIdentifier ?? "invalid bundle")")
            return
        }
        viewXib.frame = bounds
        viewXib.translatesAutoresizingMaskIntoConstraints = false
        addSubview(viewXib)
        viewXib.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
        viewXib.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
        viewXib.topAnchor.constraint(equalTo: topAnchor).isActive = true
        viewXib.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
    }

    public func setUpViews() {}
}