Load UIView from NIB

LoadFromNib.swift

class <#ClassName#>: UIView {
  // Do not forget to wire to XIB
    @IBOutlet var view: UIView!
  
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        loadFromNib()
    }

    init() {
        super.init(frame: CGRect())
        loadFromNib()
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        loadFromNib()
    }

    fileprivate func loadFromNib() {
        view = Bundle.main.loadNibNamed("<#ClassName#>", owner: self, options: nil)?.first as! UIView
        view.translatesAutoresizingMaskIntoConstraints = false
        addSubview(view)
        let views: [String : Any] = ["view": view]
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|[view]|", options: .alignAllCenterX, metrics: nil, views: views))
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[view]|", options: .alignAllCenterY, metrics: nil, views: views))

        // Any other setup
    }
}