Template for custom table cell loaded from a .xib file

CustomCell.swift

//
//  CustomCell.swift
//
//  Created by Rigoberto Sáenz Imbacuán (https://www.linkedin.com/in/rsaenzi/)
//  Copyright © 2019. All rights reserved.
//

// Notes:
// - Bind content to the ContentView in Interface Builder
// - Make the xib's file owner be this class

import UIKit

class TableCell: UITableViewCell {

    // This property must be bound to the ContentView view in Xcode Interface Builder
    @IBOutlet private weak var content: UIView!

    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        sharedInit()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        sharedInit()
    }

    private func sharedInit() {
        loadNib()
        addSubview(content)
        
        // Expand to fill its parent
        content.frame = self.bounds
        content.autoresizingMask = [.flexibleHeight, .flexibleWidth]
    }
}

UITableView+Load.swift
https://gist.github.com/rsaenzi/9df6cb80fe4828d89aa664de03b5f25f