A basic Eureka row for displaying a centred image in a row

LogoRow.swift

//
//  LogoRow.swift
//
//  Created by Andrew Plummer on 30/12/2016.
//

import Foundation

public protocol LogoCellType {
    var logo: UIImageView { get }
}

open class _LogoCell<T>: Cell<T>, LogoCellType where T: Equatable {
    public var logo: UIImageView

    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        self.logo = UIImageView()
        logo.contentMode = .center
        
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    open var dynamicConstraints = [NSLayoutConstraint]()
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    open override func setup() {
        super.setup()
        selectionStyle = .none
        height = { 280.0 }
        self.logo.translatesAutoresizingMaskIntoConstraints = false
        
        contentView.addSubview(logo)
        setNeedsUpdateConstraints()
    }
    
    open override func update() {
        super.update()
        textLabel?.text = nil
        detailTextLabel?.text = nil
        
        if let rowValue = row.value as? UIImage {
            logo.image = rowValue
        }
    }
    
    open override func updateConstraints() {
        customConstraints()
        super.updateConstraints()
    }
    
    open func customConstraints() {
        
        contentView.removeConstraints(dynamicConstraints)
        dynamicConstraints = []
        
        let views : [String: AnyObject] = ["logo": logo]
        
        dynamicConstraints.append(
            contentsOf: NSLayoutConstraint
                .constraints(
                    withVisualFormat: "V:|-[logo]-|",
                    options: [],
                    metrics: nil,
                    views: views)
        )
        
        dynamicConstraints.append(
            contentsOf: NSLayoutConstraint
                .constraints(
                    withVisualFormat: "H:|-[logo]-|",
                    options: [],
                    metrics: nil,
                    views: views)
        )
        
        contentView.addConstraints(dynamicConstraints)
    }
}

open class LogoCell : _LogoCell<UIImage>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

open class _LogoRow: Row<LogoCell> {
    required public init(tag: String?) {
        super.init(tag: tag)
    }
}

public final class LogoRow: _LogoRow, RowType {
    public required init(tag: String?) {
        super.init(tag: tag)
    }
}