Get the current first responder

UIResponder+firstResponder.swift

//
//  UIResponder.swift
//
//  Created by Groom on 23/03/2015.
//  Copyright (c) 2015 Stephen Groom. All rights reserved.
//

import UIKit

extension UIResponder {

    //Class var not supported in 1.0
    private struct CurrentFirstResponder {
        weak static var currentFirstResponder: UIResponder?
    }
    private class var currentFirstResponder: UIResponder? {
        get { return CurrentFirstResponder.currentFirstResponder }
        set(newValue) { CurrentFirstResponder.currentFirstResponder = newValue }
    }
    
    class func getCurrentFirstResponder() -> UIResponder? {
        currentFirstResponder = nil
        UIApplication.sharedApplication().sendAction("findFirstResponder", to: nil, from: nil, forEvent: nil)
        return currentFirstResponder
    }
    
    func findFirstResponder() {
        UIResponder.currentFirstResponder = self
    }
}