Instantiating custom UIView from xib

UIViewInitFromXib.swift

import UIKit

extension UIView {
    static func initViewFromNib() -> Self {
        let nibName = String(describing: self)
        let index = 0
        let view = Bundle.main.loadNibNamed(nibName, owner: nil, options: nil)![index]
        if let castedView = view as? Self {
            return castedView
        } else {
            assertionFailure("Cannot cast to \(nibName)")
            return Self()
        }
    }
}