Swift enum to return ready-to-use UIImageView with a logo from asset library.

LogoView.swift

import UIKit

enum LogoView : UIViewConvertible {
    case Default()
    case Large()
    case Symbol()
    
    // MARK: UIViewConvertible
    var View: UIView {
        switch self {
        case .Large():
            return UIImageView(image: UIImage(named: "logo-large")?.imageWithRenderingMode(.AlwaysTemplate))
        case .Symbol():
            return UIImageView(image: UIImage(named: "logo-symbol")?.imageWithRenderingMode(.AlwaysTemplate))
        default:
            return UIImageView(image: UIImage(named: "logo-default")?.imageWithRenderingMode(.AlwaysTemplate))
        }
    }
}

UIViewConvertible.swift

import Foundation
import UIKit

public protocol UIViewConvertible {
    var View: UIView { get }
}

extension UIView: UIViewConvertible {
    public var View: UIView {
        return self
    }
}