Configurable.swift

import Foundation

//Inspired by: https://github.com/devxoul/Then

public protocol Configurable {}

extension Configurable {
    public func configure(block: (inout Self)->Void) -> () -> Self {
        return {
            var copy = self
            block(&copy)
            return copy
        }
    }
}

extension NSObject: Configurable {}

//MARK:- Usage

class MyController: UIViewController, UITextFieldDelegate {

    let titleLabel = UILabel().configure {
        $0.textColor = UIColor.greenColor()
    }()

    lazy var valueField2: UITextField = UITextField().configure {
        $0.delegate = self
    }()

    lazy var refreshControl: UIRefreshControl = UIRefreshControl().configure {
        $0.addTarget(self, action: #selector(refresh(_:)), forControlEvents: .ValueChanged)
    }()

    func refresh(sender: AnyObject) {
        //Refresh UI
    }
}