Snippet to create a custom back button with label + image

CustomBackButton.swift

func CustomBackButton() {
        leftView = UIView()
        
        let image : UIImage = #imageLiteral(resourceName: "back_button")
        let imageView = UIImageView(frame: CGRect(x: -15, y: 0, width: 30, height: 30))
        imageView.contentMode = .scaleAspectFit
        imageView.image = image
        
        leftView.addSubview(imageView)
        
        let label: UILabel = {
            let label = UILabel()
            label.font = UIFont(name: "Helvetica", size: 15.0)
            label.text = "Back"
            label.textColor = UIColor.Blue
            label.textAlignment = .right
            label.sizeToFit()
            label.frame = CGRect(x: 10, y: 8, width: label.frame.width, height: label.frame.height)
            return label
        }()
        
        leftView.addSubview(label)
        
        leftView.frame = CGRect(x: 0, y: 0, width: imageView.frame.width + label.frame.width, height: 30)
        
        leftViewTapGesture.addTarget(self, action: #selector(onClickBack))
        leftView.addGestureRecognizer(leftViewTapGesture)
        
        let barButton = UIBarButtonItem(customView: leftView)
        self.navigationItem.leftBarButtonItem = barButton
        
    }

func onClickBack() {
    self.navigationController?.popViewController(animated: true)
}