Dynamic instantiation of Swift classes conforming to a specific protocol

gistfile1.swift

import UIKit

protocol FooProtocol {
    init()
    func description() -> String
}


class Bar : FooProtocol {
    required init() {
    }
    
    func description() -> String {
        return "Instance of \(self)"
    }
}

let dict: [String : FooProtocol.Type] = ["class" : Bar.self]

if let klass = dict["class"]  {
    klass.init().description()
}