var view: UIView!

override init(frame: CGRect) {
    // 1. setup any properties here
    
    // 2. call super.init(frame:)
    super.init(frame: frame)
    
    // 3. Setup view from .xib file
    xibSetup()
}

required init?(coder aDecoder: NSCoder) {
    // 1. setup any properties here
    
    // 2. call super.init(coder:)
    super.init(coder: aDecoder)
    
    // 3. Setup view from .xib file
    xibSetup()
}

func xibSetup() {
    view = loadViewFromNib()
    
    // use bounds not frame or it'll be offset
    view.frame = bounds
    
    // Make the view stretch with containing view
    view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
    
    // Adding custom subview on top of our view (over any custom drawing > see note below)
    addSubview(view)
}

func loadViewFromNib() -> UIView {
    let bundle = Bundle(for: type(of: self))
    // load MyView.xib
    let nib = UINib(nibName: "MyView", bundle: bundle)
    guard let view = nib.instantiate(withOwner: self, options: nil)[0] as?  UIView else { fatalError("cast to UIView Fail") }
    return view
}

/*
 // Only override drawRect: if you perform custom drawing.
 // An empty implementation adversely affects performance during animation.
 override func drawRect(rect: CGRect) {
 
 // If you add custom drawing, it'll be behind any view loaded from XIB
 }
 */